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Cebuhar JD, Negrete J, Rodríguez Pirani LS, Picone AL, Proietti M, Romano RM, Della Védova CO, Casaux R, Secchi ER, Botta S. Anthropogenic debris in three sympatric seal species of the Western Antarctic Peninsula. Sci Total Environ 2024; 922:171273. [PMID: 38408675 DOI: 10.1016/j.scitotenv.2024.171273] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/30/2023] [Revised: 02/13/2024] [Accepted: 02/23/2024] [Indexed: 02/28/2024]
Abstract
Litter pollution is a growing concern, including for Antarctica and the species that inhabit this ecosystem. In this study, we investigated the microplastic contamination in three seal species that inhabit the Western Antarctic Peninsula: crabeater (Lobodon carcinophaga), leopard (Hydrurga leptonyx) and Weddell (Leptonychotes weddellii) seals. Given the worldwide ubiquity of this type of contaminant, including the Southern Ocean, we hypothesized that the three seal species would present anthropogenic debris in their feces. We examined 29 scat samples of crabeater (n = 5), leopard (n = 13) and Weddell (n = 11) seals. The chemical composition of the items found were identified using micro-Raman and micro-FTIR spectroscopies. All the samples of the three species presented anthropic particles (frequency of occurrence - %FO - 100 %). Fibers were the predominant debris, but fragments and filaments were also present. Particles smaller than 5 mm (micro debris) were predominant in all the samples. Leopard seals ingested significantly larger micro-debris in comparison with the other seal species. The dominant color was black followed by blue and white. Micro-Raman and micro-FTIR Spectroscopies revealed the presence of different anthropogenic pigments such as reactive blue 238, Indigo 3600 and copper phthalocyanine (blue and green). Carbon black was also detected in the samples, as well as plastic polymers such as polystyrene, polyester and polyethylene terephthalate (PET), polyamide, polypropylene and polyurethane These results confirm the presence of anthropogenic contamination in Antarctic seals and highlight the need for actions to mitigate the effects and reduce the contribution of debris in the Antarctic ecosystem.
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Affiliation(s)
- Julieta D Cebuhar
- Laboratório de Ecologia e Conservação da Megafauna Marinha, Instituto de Oceanografia, Universidade Federal do Rio Grande-FURG, Av. Itália Km 8 s/n, Rio Grande, Brazil; Programa de Pós-Graduação em Oceanografia Biológica, Instituto de Oceanografia, Universidade Federal do Rio Grande-FURG, Rio Grande, Brazil.
| | - Javier Negrete
- Laboratório de Predadores Tope, Instituto Antártico Argentino, Av. 25 de Mayo 1147, Villa Lynch, Buenos Aires, Argentina; Facultad de Ciencias Naturales y Museo, Calle 64 N° 3, Universidad Nacional de La Plata, La Plata 1900, Argentina; Consejo Nacional de Investigaciones Científicas Y Técnicas (CONICET), Godoy Cruz, 2290, C1425FQB, Ciudad Autónoma de Buenos Aires, Buenos Aires, Argentina
| | - Lucas S Rodríguez Pirani
- CEQUINOR (UNLP, CCT-CONICET La Plata, associated with CIC), Departamento de Química, Facultad de Ciencias Exactas, Universidad Nacional de La Plata, Blvd. 120 N° 1465, La Plata 1900, Argentina
| | - A Lorena Picone
- CEQUINOR (UNLP, CCT-CONICET La Plata, associated with CIC), Departamento de Química, Facultad de Ciencias Exactas, Universidad Nacional de La Plata, Blvd. 120 N° 1465, La Plata 1900, Argentina
| | - Maira Proietti
- Laboratório de Ecologia Molecular Marinha and Projeto Lixo Marinho, Instituto de Oceanografia, Universidade Federal do Rio Grande-FURG, Av. Itália Km 8 s/n, Rio Grande, Brasil Rio Grande, Brazil; The Ocean Cleanup, Rotterdam, Netherlands
| | - Rosana M Romano
- CEQUINOR (UNLP, CCT-CONICET La Plata, associated with CIC), Departamento de Química, Facultad de Ciencias Exactas, Universidad Nacional de La Plata, Blvd. 120 N° 1465, La Plata 1900, Argentina
| | - Carlos O Della Védova
- CEQUINOR (UNLP, CCT-CONICET La Plata, associated with CIC), Departamento de Química, Facultad de Ciencias Exactas, Universidad Nacional de La Plata, Blvd. 120 N° 1465, La Plata 1900, Argentina
| | - Ricardo Casaux
- Centro de Investigación Esquel de Montaña y Estepa Patagónica (CIEMEP), Roca 780, 9200 Esquel, Chubut, Argentina
| | - Eduardo R Secchi
- Laboratório de Ecologia e Conservação da Megafauna Marinha, Instituto de Oceanografia, Universidade Federal do Rio Grande-FURG, Av. Itália Km 8 s/n, Rio Grande, Brazil
| | - Silvina Botta
- Laboratório de Ecologia e Conservação da Megafauna Marinha, Instituto de Oceanografia, Universidade Federal do Rio Grande-FURG, Av. Itália Km 8 s/n, Rio Grande, Brazil
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Villafañe AB, Ronda AC, Rodríguez Pirani LS, Picone AL, Lucchi LD, Romano RM, Pereyra MT, Arias AH. Microplastics and anthropogenic debris in rainwater from Bahia Blanca, Argentina. Heliyon 2023; 9:e17028. [PMID: 37383205 PMCID: PMC10293668 DOI: 10.1016/j.heliyon.2023.e17028] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/02/2022] [Revised: 05/30/2023] [Accepted: 06/05/2023] [Indexed: 06/30/2023] Open
Abstract
Concern about atmospheric microplastic (MP) contamination has increased in recent years. This study assessed the abundance of airborne anthropogenic particles, including MPs, deposited in rainfall in Bahia Blanca, southwest Buenos Aires, Argentina. Rainwater samples were collected monthly from March to December 2021 using an active wet-only collector consisting of a glass funnel and a PVC pipe that is only open during rain events. Results obtained show that all rain samples contained anthropogenic debris. The term "anthropogenic debris" is used to refer to the total number of particles as not all the particles found could be determined as plastic. Among all the samples, an average deposition of 77 ± 29 items (anthropogenic debris) m-2d-1 was found. The highest deposition was observed in November (148 items m-2d-1) while the lowest was found in March (46 items m-2d-1). Anthropogenic debris ranged in size from 0.1 mm to 3.87 mm with the most abundant particles being smaller than 1 mm (77.8%). The dominant form of particles found were fibers (95%), followed by fragments (3.1%). Blue color predominated (37.2%) in the total number of samples, followed by light blue (23.3%) and black (21.7%). Further, small particles (<2 mm), apparently composed of mineral material and plastic fibers, were recognized. The chemical composition of suspected MPs was examined by Raman microscopy. The analysis of μ-Raman spectra confirmed the presence of polystyrene, polyethylene terephthalate, and polyethylene vinyl acetate fibers and provided evidence of fibers containing industrial additives such as indigo dye. This is the first assessment of MP pollution in rain in Argentina.
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Affiliation(s)
- A. Belén Villafañe
- Instituto Argentino de Oceanografía (IADO-CONICET/UNS), Camino La Carrindanga km 7.5, 8000, Bahía Blanca, Argentina
| | - Ana C. Ronda
- Instituto Argentino de Oceanografía (IADO-CONICET/UNS), Camino La Carrindanga km 7.5, 8000, Bahía Blanca, Argentina
- Departamento de Biología, Bioquímica y Farmacia, Universidad Nacional del Sur, Av. Alem 1253, 8000 Bahía Blanca, Argentina
| | - Lucas S. Rodríguez Pirani
- CEQUINOR (UNLP, CCT-CONICET La Plata, associated with CIC), Departamento de Química, Facultad de Ciencias Exactas, Universidad Nacional de La Plata. Blvd. 120 N° 1465, La Plata (1900), Argentina
| | - A. Lorena Picone
- CEQUINOR (UNLP, CCT-CONICET La Plata, associated with CIC), Departamento de Química, Facultad de Ciencias Exactas, Universidad Nacional de La Plata. Blvd. 120 N° 1465, La Plata (1900), Argentina
| | - Leandro D. Lucchi
- Comité Técnico Ejecutivo, Municipalidad de Bahía Blanca, Av. Gral. San Martín 3474 , Bahía Blanca, Argentina
| | - Rosana M. Romano
- CEQUINOR (UNLP, CCT-CONICET La Plata, associated with CIC), Departamento de Química, Facultad de Ciencias Exactas, Universidad Nacional de La Plata. Blvd. 120 N° 1465, La Plata (1900), Argentina
| | - Marcelo T. Pereyra
- INQUISUR-Departamento de Química, Universidad Nacional del Sur (UNS), Av. Alem 1253, Bahía Blanca, Argentina
| | - Andrés H. Arias
- Instituto Argentino de Oceanografía (IADO-CONICET/UNS), Camino La Carrindanga km 7.5, 8000, Bahía Blanca, Argentina
- Departamento de Química, Universidad Nacional del Sur (UNS), Av. Alem 1253, Bahía Blanca, Argentina
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Cayón VM, Erben MF, Romano RM, Stammler HG, Mitzel NW, Della Védova CO. Spectroscopic and structural studies on phenyl and pentafluorophenyl trifluorothioacetate, and pentafluorophenyl trifluoroacetate, CF 3C(O)SC 6H 5, CF 3C(O)SC 6F 5 and CF 3C(O)OC 6F 5. Phys Chem Chem Phys 2023; 25:9394-9403. [PMID: 36928872 DOI: 10.1039/d2cp05909f] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/18/2023]
Abstract
Phenyl and pentafluorophenyl trifluorothioacetate, CF3C(O)SC6H5 and CF3C(O)SC6F5, were prepared by condensation of CF3C(O)Cl and the corresponding mercaptan RSH under vacuum conditions. The compounds were isolated and properly characterized by using infrared spectroscopy, UV-Vis, multinuclear NMR spectroscopy techniques and by mass spectrometry. The crystal structures have been determined for both CF3C(O)SC6H5 and according to the best of our knowledge the not yet reported in the literature CF3C(O)SC6F5 species. The conformational preferences of the three title species were also determined by means of FTIR spectroscopy. In the case of CF3C(O)OC6F5, the FTIR spectrum was also measured in an Ar-matrix and a subsequent photochemical study was performed. The main stable photoproduct found, beside CO, was the ether C6F5OCF3. Quantum-chemical calculations were used to determine the conformational preferences and complement the experimental structure parameters as well as to interpret the UV-Vis spectra determined for the three species under study. As a result of all these experimental determinations complemented with computational calculations, it can be affirmed that the title compounds present a single syn conformation in the analyzed phases (syn with respect to the CO double bond and the opposite C-chalcogen single bond). This finding reconfirms the syn conformational transferability found so far for both thioesters and esters, a result that is closely related to the properties of these families in biological processes.
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Affiliation(s)
- Vanina M Cayón
- CEQUINOR (UNLP-CONICET, CCT-La Plata, associated with CIC), Departamento de Química, Facultad de Ciencias Exactas, Universidad Nacional de La Plata, Boulevard 120 e/60 y 64 No. 1465 La Plata B1900, Buenos Aires, Argentina.
| | - Mauricio F Erben
- CEQUINOR (UNLP-CONICET, CCT-La Plata, associated with CIC), Departamento de Química, Facultad de Ciencias Exactas, Universidad Nacional de La Plata, Boulevard 120 e/60 y 64 No. 1465 La Plata B1900, Buenos Aires, Argentina.
| | - Rosana M Romano
- CEQUINOR (UNLP-CONICET, CCT-La Plata, associated with CIC), Departamento de Química, Facultad de Ciencias Exactas, Universidad Nacional de La Plata, Boulevard 120 e/60 y 64 No. 1465 La Plata B1900, Buenos Aires, Argentina.
| | - Hans-Georg Stammler
- Universität Bielefeld, Lehrstuhl für Anorganische Chemie und Strukturchemie, Universitätsstraße 25, 33615, Bielefeld, Germany.
| | - Norbert W Mitzel
- Universität Bielefeld, Lehrstuhl für Anorganische Chemie und Strukturchemie, Universitätsstraße 25, 33615, Bielefeld, Germany.
| | - Carlos O Della Védova
- CEQUINOR (UNLP-CONICET, CCT-La Plata, associated with CIC), Departamento de Química, Facultad de Ciencias Exactas, Universidad Nacional de La Plata, Boulevard 120 e/60 y 64 No. 1465 La Plata B1900, Buenos Aires, Argentina.
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Recabarren-Villalón T, Ronda AC, La Sala L, Sanhueza C, Díaz L, Rodríguez Pirani LS, Picone AL, Romano RM, Petracci P, Arias AH. First assessment of debris pollution in the gastrointestinal content of juvenile Magellanic penguins (Spheniscus magellanicus) stranded on the west south Atlantic coasts. Mar Pollut Bull 2023; 188:114628. [PMID: 36701975 DOI: 10.1016/j.marpolbul.2023.114628] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/25/2022] [Revised: 01/12/2023] [Accepted: 01/15/2023] [Indexed: 06/17/2023]
Abstract
This paper provides the first evidence of debris pollution, including plastic, in juvenile Magellanic penguins (Spheniscus magellanicus) found stranded on the Atlantic coast of southern Buenos Aires Province, Argentina. Macro-, meso- and microparticles of anthropogenic origin were observed in 100 % of the studied birds, with debris abundance ranging between 33 and 200 items/bird. Microparticles represented 91 % of the total debris and 97 % of them were fibers. Black particles were the most abundant (30 %), followed by transparent (26 %), blue (14 %), yellow (10.3 %), and red (10 %). Infrared and Raman spectroscopy identified 62.7 % of the total particles as plastics, with polypropylene (27.8 %) and polyester (21.6 %) being the most abundant polymers. Semi-synthetic cellulosic fibers, metallic particles, and pigments were also found. The presence of metallic microparticles was suggested for the first time in penguins. Stranded juvenile Magellanic penguins are proposed as promising bioindicators of plastic pollution in the South Atlantic.
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Affiliation(s)
- Tatiana Recabarren-Villalón
- Instituto Argentino de Oceanografía (IADO-CONICET/UNS), Camino La Carrindanga km 7.5, 8000 Bahía Blanca, Argentina
| | - Ana C Ronda
- Instituto Argentino de Oceanografía (IADO-CONICET/UNS), Camino La Carrindanga km 7.5, 8000 Bahía Blanca, Argentina; Departamento de Biología, Bioquímica y Farmacia, Universidad Nacional del Sur, Av. Alem 1253, 8000 Bahía Blanca, Argentina
| | - Luciano La Sala
- Instituto de Ciencias Biológicas y Biomédicas del Sur, CONICET/UNS, Bahía Blanca, Argentina
| | - Cristina Sanhueza
- Grupo de Estudio en Conservación y Manejo (Gekko), Departamento de Biología, Bioquímica y Farmacia, Universidad Nacional del Sur, Bahía Blanca, Argentina
| | - Lucrecia Díaz
- Grupo de Investigación y Rehabilitación de Tortugas Marinas (Quelona), Departamento de Biología, Bioquímica y Farmacia, Universidad Nacional del Sur, Bahía Blanca, Argentina
| | - Lucas S Rodríguez Pirani
- CEQUINOR (UNLP, CCT-CONICET La Plata, associated with CIC), Departamento de Química, Facultad de Ciencias Exactas, Universidad Nacional de La Plata, Blvd. 120 N° 1465, La Plata 1900, Argentina
| | - A Lorena Picone
- CEQUINOR (UNLP, CCT-CONICET La Plata, associated with CIC), Departamento de Química, Facultad de Ciencias Exactas, Universidad Nacional de La Plata, Blvd. 120 N° 1465, La Plata 1900, Argentina
| | - Rosana M Romano
- CEQUINOR (UNLP, CCT-CONICET La Plata, associated with CIC), Departamento de Química, Facultad de Ciencias Exactas, Universidad Nacional de La Plata, Blvd. 120 N° 1465, La Plata 1900, Argentina
| | - Pablo Petracci
- Grupo de Estudio en Conservación y Manejo (Gekko), Departamento de Biología, Bioquímica y Farmacia, Universidad Nacional del Sur, Bahía Blanca, Argentina; Estación de Rescate de Fauna Marina Guillermo "Indio" Fidalgo, Sitio 11, Puerto Galván Bahía Blanca Buenos Aires, Argentina
| | - Andrés H Arias
- Instituto Argentino de Oceanografía (IADO-CONICET/UNS), Camino La Carrindanga km 7.5, 8000 Bahía Blanca, Argentina; Departamento de Química, Universidad Nacional del Sur (UNS), Av. Alem 1253, 8000 Bahía Blanca, Argentina.
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Picone AL, Rizzato ML, Lusi AR, Romano RM. Stamplike flexible SERS substrate for in-situ rapid detection of thiram residues in fruits and vegetables. Food Chem 2022; 373:131570. [PMID: 34810016 DOI: 10.1016/j.foodchem.2021.131570] [Citation(s) in RCA: 22] [Impact Index Per Article: 11.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/27/2021] [Revised: 10/07/2021] [Accepted: 11/07/2021] [Indexed: 11/19/2022]
Abstract
A simple and sensitive Surface-Enhanced Raman Spectroscopy (SERS) method for the detection of thiram residues in fruit and vegetable peels is reported. A flexible SERS substrate based on silver nanoparticles in an agar gel has been developed and characterised. Peels of different fruits and vegetables were intentionally contaminated with different amounts of thiram. The analyte was then extracted within few seconds by gentle rubbing the surface with the agar substrate using it as a stamp. The optimum experimental conditions of the developed method were explored. The limit of detection of thiram in the peels of tomato and green pepper was 140 pg/cm2. The values achieved for apple was 2 pg/cm2. The method presented could be extensively used for the detection of traces of other contaminants on food surfaces and for other relevant applications.
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Affiliation(s)
- A Lorena Picone
- CEQUINOR (UNLP, CCT-CONICET La Plata, Associated with CIC), Departamento de Química, Facultad de Ciencias Exactas, Universidad Nacional de La Plata, Boulevard 120 N° 1465, La Plata, CP 1900, Argentina.
| | - María Luz Rizzato
- CEQUINOR (UNLP, CCT-CONICET La Plata, Associated with CIC), Departamento de Química, Facultad de Ciencias Exactas, Universidad Nacional de La Plata, Boulevard 120 N° 1465, La Plata, CP 1900, Argentina
| | - Anabela R Lusi
- CEQUINOR (UNLP, CCT-CONICET La Plata, Associated with CIC), Departamento de Química, Facultad de Ciencias Exactas, Universidad Nacional de La Plata, Boulevard 120 N° 1465, La Plata, CP 1900, Argentina
| | - Rosana M Romano
- CEQUINOR (UNLP, CCT-CONICET La Plata, Associated with CIC), Departamento de Química, Facultad de Ciencias Exactas, Universidad Nacional de La Plata, Boulevard 120 N° 1465, La Plata, CP 1900, Argentina.
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Juncal LC, Ferrer EG, Williams PA, Boese R, Gustavo Pozzi C, Della Védova CO, Romano RM. Synthesis, X-ray Structures, and Spectroscopic Characterization of cis and trans-bis(O-propyldithiocarbonato)bis(pyridine)nickel(II), cis and trans-[Ni(CH3CH2CH2OC(S)S)2(C5H5N)2]. Chem Phys Lett 2022. [DOI: 10.1016/j.cplett.2022.139487] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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Bava YB, Cozzarín MV, Della Védova CO, Willner H, Romano RM. Preparation of FC(S)SF, FC(S)SeF and FC(Se)SeF through matrix photochemical reactions of F 2 with CS 2, SCSe, and CSe 2. Phys Chem Chem Phys 2021; 23:20892-20900. [PMID: 34528659 DOI: 10.1039/d1cp03764a] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The reactions of F2 with CS2, SCSe, and CSe2, respectively, were analyzed under matrix conditions by co-deposition of the halogen with the triatomic molecules trapped in argon matrices at cryogenic temperatures. In all cases, after co-deposition, the formation of the respective van der Waals complexes is observed. When each mixture is subsequently irradiated by means of broad-band UV-visible light (200 ≤ λ ≤ 800 nm), FC(S)SF, fluorothiocarbonylsulfenyl fluoride, FC(S)SeF, fluorothiocarbonylselenyl fluoride and FC(Se)SeF, fluoroselenocarbonylselenyl fluoride are produced, respectively. All these species exist as two stable planar syn- and anti-conformers (syn- and anti- of the CZ double bond, Y = S, Se, with respect to the S-F or Se-F single bond, respectively). For FC(S)SF, syn- is the rotamer with the lowest energy, while for both FC(S)SeF and FC(Se)SeF the anti-form is the lowest energy conformer. In all cases, other products due to alternative or subsequent photochannels are observed during the photochemical processes carried out in argon matrices at cryogenic temperatures.
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Affiliation(s)
- Yanina B Bava
- CEQUINOR (UNLP, CCT-CONICET La Plata, associated with CIC), Departamento de Química, Facultad de Ciencias Exactas, Universidad Nacional de La Plata, Blvd. 120 No. 1465, CC 962, La Plata, CP 1900, Argentina.
| | - Melina V Cozzarín
- CEQUINOR (UNLP, CCT-CONICET La Plata, associated with CIC), Departamento de Química, Facultad de Ciencias Exactas, Universidad Nacional de La Plata, Blvd. 120 No. 1465, CC 962, La Plata, CP 1900, Argentina.
| | - Carlos O Della Védova
- CEQUINOR (UNLP, CCT-CONICET La Plata, associated with CIC), Departamento de Química, Facultad de Ciencias Exactas, Universidad Nacional de La Plata, Blvd. 120 No. 1465, CC 962, La Plata, CP 1900, Argentina.
| | - Helge Willner
- Anorganische Chemie, Bergische Universität Wuppertal, Gaußstr. 20, D-42097 Wuppertal, Germany
| | - Rosana M Romano
- CEQUINOR (UNLP, CCT-CONICET La Plata, associated with CIC), Departamento de Química, Facultad de Ciencias Exactas, Universidad Nacional de La Plata, Blvd. 120 No. 1465, CC 962, La Plata, CP 1900, Argentina.
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Tamone LM, Picone AL, Romano RM. New insights into the Ar-matrix-isolation FTIR spectroscopy and photochemistry of dichloroacetyl chloride, ClC(O)CHCl2: Influence of O2 and comparison with gas-phase photochemistry. Journal of Photochemistry and Photobiology 2021. [DOI: 10.1016/j.jpap.2021.100019] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022] Open
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Cayón VM, Erben MF, Romano RM, Stammler HG, Mitzel NW, Della Védova CO. Structure, conformational properties and matrix photochemistry of S-( tert-butyl)trifluorothioacetate CF 3C(O)SC(CH 3) 3. NEW J CHEM 2020. [DOI: 10.1039/d0nj03173a] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/10/2023]
Abstract
CF3C(O)SC(CH3)3 species adopts a synperiplanar conformation with Cs symmetry. After UV-visible broadband light irradiation in matrix conditions CF3C(O)SC(CH3)3 photoevolves to CF3SC(CH3)3 and CO.
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Affiliation(s)
- Vanina M. Cayón
- CEQUINOR (UNLP-CONICET, CCT-La Plata, associated with CIC)
- Departamento de Química
- Facultad de Ciencias Exactas
- Universidad Nacional de La Plata
- Buenos Aires
| | - Mauricio F. Erben
- CEQUINOR (UNLP-CONICET, CCT-La Plata, associated with CIC)
- Departamento de Química
- Facultad de Ciencias Exactas
- Universidad Nacional de La Plata
- Buenos Aires
| | - Rosana M. Romano
- CEQUINOR (UNLP-CONICET, CCT-La Plata, associated with CIC)
- Departamento de Química
- Facultad de Ciencias Exactas
- Universidad Nacional de La Plata
- Buenos Aires
| | - Hans-Georg Stammler
- Universität Bielefeld
- Lehrstuhl für Anorganische Chemie und Strukturchemie
- 33615 Bielefeld
- Germany
| | - Norbert W. Mitzel
- Universität Bielefeld
- Lehrstuhl für Anorganische Chemie und Strukturchemie
- 33615 Bielefeld
- Germany
| | - Carlos O. Della Védova
- CEQUINOR (UNLP-CONICET, CCT-La Plata, associated with CIC)
- Departamento de Química
- Facultad de Ciencias Exactas
- Universidad Nacional de La Plata
- Buenos Aires
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Picone AL, Romano RM, Della Védova CO. Color Source for the First Argentinian Flags. ACS Omega 2019; 4:11424-11432. [PMID: 31460247 PMCID: PMC6682053 DOI: 10.1021/acsomega.9b01412] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 05/15/2019] [Accepted: 06/20/2019] [Indexed: 06/10/2023]
Abstract
In this work, a historical controversy of more than 200 years is settled by the study of the oldest preserved Argentinian flag. The results of the present work reinforce the hypothesis of a number of historians who consider it to be the first flag that was originally hoisted on February 27, 1812, on the banks of the Paraná River. The work consists of a study of the original textile. Through chemical analysis and implementation of different types of analyses, techniques, and spectroscopies such as UV-vis, UV-vis diffuse reflectance spectroscopy, attenuated total reflectance Fourier transform infrared spectroscopy, scanning electron microscopy-energy-dispersive X-ray spectroscopy, and resonance Raman, the original characteristics of the flag of Macha were determined. The flag was colored with indigotin from Europe (from Isatis tinctoria) and made of silk; it is white, blue, and white in a horizontal arrangement. It was not treated with tin, and its blue color was subsequently adopted by the Central American Confederation and later by various states of Central America. According to related contemporaneous stories, its preservation was due to the watchfulness of the patriots.
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Rodríguez Pirani LS, Cánneva A, Geronés M, Della Védova CO, Romano RM, Cavasso-Filho R, Erben MF. Formation of HCO+ and HCS+ Ions in the Photodissociation of CH3OC(S)SCH3 under VUV Synchrotron Radiation. J Phys Chem A 2019; 123:6674-6682. [DOI: 10.1021/acs.jpca.9b03670] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Lucas S. Rodríguez Pirani
- CEQUINOR (UNLP—CONICET, CCT La Plata, associated with CIC PBA). Departamento de Química, Facultad de Ciencias Exactas, Universidad Nacional de la Plata. Boulevard 120 e/ 60 y 64 No 1465 CP 1900, La Plata, República Argentina
| | - Antonela Cánneva
- CEQUINOR (UNLP—CONICET, CCT La Plata, associated with CIC PBA). Departamento de Química, Facultad de Ciencias Exactas, Universidad Nacional de la Plata. Boulevard 120 e/ 60 y 64 No 1465 CP 1900, La Plata, República Argentina
| | - Mariana Geronés
- CEQUINOR (UNLP—CONICET, CCT La Plata, associated with CIC PBA). Departamento de Química, Facultad de Ciencias Exactas, Universidad Nacional de la Plata. Boulevard 120 e/ 60 y 64 No 1465 CP 1900, La Plata, República Argentina
| | - Carlos O. Della Védova
- CEQUINOR (UNLP—CONICET, CCT La Plata, associated with CIC PBA). Departamento de Química, Facultad de Ciencias Exactas, Universidad Nacional de la Plata. Boulevard 120 e/ 60 y 64 No 1465 CP 1900, La Plata, República Argentina
| | - Rosana M. Romano
- CEQUINOR (UNLP—CONICET, CCT La Plata, associated with CIC PBA). Departamento de Química, Facultad de Ciencias Exactas, Universidad Nacional de la Plata. Boulevard 120 e/ 60 y 64 No 1465 CP 1900, La Plata, República Argentina
| | - Reinaldo Cavasso-Filho
- Universidade Federal do ABC, Rua Catequese, 242, CEP: 09090-400, Santo André, São Paulo, Brazil
| | - Mauricio F. Erben
- CEQUINOR (UNLP—CONICET, CCT La Plata, associated with CIC PBA). Departamento de Química, Facultad de Ciencias Exactas, Universidad Nacional de la Plata. Boulevard 120 e/ 60 y 64 No 1465 CP 1900, La Plata, República Argentina
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12
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Berrueta Martínez Y, Bava YB, Cavasso Filho RL, Erben MF, Romano RM, Della Védova CO. Valence and Inner Electronic Excitation, Ionization, and Fragmentation of Perfluoropropionic Acid. J Phys Chem A 2018; 122:9842-9850. [DOI: 10.1021/acs.jpca.8b09252] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Yanina Berrueta Martínez
- CEQUINOR (UNLP-CONICET-CIC), Departamento de Química, Facultad de Ciencias Exactas, Universidad Nacional de La Plata, Blvd. 120 N° 1465, 1900 La Plata, República Argentina
| | - Yanina B. Bava
- CEQUINOR (UNLP-CONICET-CIC), Departamento de Química, Facultad de Ciencias Exactas, Universidad Nacional de La Plata, Blvd. 120 N° 1465, 1900 La Plata, República Argentina
| | | | - Mauricio F. Erben
- CEQUINOR (UNLP-CONICET-CIC), Departamento de Química, Facultad de Ciencias Exactas, Universidad Nacional de La Plata, Blvd. 120 N° 1465, 1900 La Plata, República Argentina
| | - Rosana M. Romano
- CEQUINOR (UNLP-CONICET-CIC), Departamento de Química, Facultad de Ciencias Exactas, Universidad Nacional de La Plata, Blvd. 120 N° 1465, 1900 La Plata, República Argentina
| | - Carlos O. Della Védova
- CEQUINOR (UNLP-CONICET-CIC), Departamento de Química, Facultad de Ciencias Exactas, Universidad Nacional de La Plata, Blvd. 120 N° 1465, 1900 La Plata, República Argentina
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13
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Romano RM, Moreno Betancourt A, Della Védova CO, Zeng X, Beckers H, Willner H, Schwabedissen J, Mitzel NW. Preparation and Properties of Chlorosulfuryl Chloroformate, ClC(O)OSO 2Cl. Inorg Chem 2018; 57:14834-14842. [PMID: 30444121 DOI: 10.1021/acs.inorgchem.8b02581] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
The novel chlorosulfuryl chloroformate, ClC(O)OSO2Cl, was prepared by the reaction of CCl4 and SO3. Alternatively, the compound was obtained from the direct insertion reaction of SO3 to Cl2C═O. The latter reaction constitutes also a confirmation of the proposed mechanism for the former one. Density functional theory and MP2 theoretical approximations predict the existence of two conformers, syn-gauche and syn-anti, depending on the value adopted by the dihedral angles ϕ(Cl-C-O-S) and ϕ(C-O-S-Cl). The structure of the syn-gauche conformer was determined by gas-phase electron diffraction (GED). The existence of the syn-anti conformer can be neither confirmed nor excluded by the GED experiment. Vibrational spectra (vapor-phase and argon-matrix Fourier transform infrared and liquid Fourier transform Raman) were interpreted by an equilibrium mixture between both conformers.
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Affiliation(s)
- Rosana M Romano
- CEQUINOR (UNLP, CCT-CONICET La Plata), Departamento de Química, Facultad de Ciencias Exactas , Universidad Nacional de La Plata . Boulevard 120, N° 1465 , La Plata CP1900 , Argentina
| | - Angélica Moreno Betancourt
- CEQUINOR (UNLP, CCT-CONICET La Plata), Departamento de Química, Facultad de Ciencias Exactas , Universidad Nacional de La Plata . Boulevard 120, N° 1465 , La Plata CP1900 , Argentina
| | - Carlos O Della Védova
- CEQUINOR (UNLP, CCT-CONICET La Plata), Departamento de Química, Facultad de Ciencias Exactas , Universidad Nacional de La Plata . Boulevard 120, N° 1465 , La Plata CP1900 , Argentina
| | - Xiaoqing Zeng
- College of Chemistry, Chemical Engineering and Materials Science , Soochow University , Suzhou 215123 , Jiangsu , China
| | - Helmut Beckers
- Institut für Chemie und Biochemie, Anorganische Chemie , FU Berlin , Fabeckstraße 34/36 , Berlin 14195 , Germany
| | - Helge Willner
- FB C, Anorganische Chemie , Bergische Universität Wuppertal , Gaußstraße 20 , Wuppertal 42119 , Germany
| | - Jan Schwabedissen
- Fakultät für Chemie, Lehrstuhl für Anorganische Chemie und Strukturchemie , Universität Bielefeld , Universitätsstraße 25 , Bielefeld 33615 , Germany
| | - Norbert W Mitzel
- Fakultät für Chemie, Lehrstuhl für Anorganische Chemie und Strukturchemie , Universität Bielefeld , Universitätsstraße 25 , Bielefeld 33615 , Germany
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14
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García-Reyes F, Fantoni AC, Barón M, Romano RM, Punte GM, Echeverría GA. Role of weak C-H...O and strong N-H...O intermolecular interactions on the high-symmetry molecular packing of trans-cyclohexane-1,4-dicarboxamide. Acta Crystallogr C Struct Chem 2018; 74:1068-1078. [PMID: 30284971 DOI: 10.1107/s2053229618011750] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/07/2018] [Accepted: 08/20/2018] [Indexed: 11/10/2022]
Abstract
An unpredicted fourfold screw N-H...O hydrogen bond C(4) motif in a primary dicarboxamide (trans-cyclohexane-1,4-dicarboxamide, C8H14N2O2) was investigated by single-crystal X-ray diffraction and IR and Raman spectroscopies. Electron-density topology and intermolecular energy analyses determined from ab initio calculations were employed to examine the influence of weak C-H...O hydrogen-bond interactions on the peculiar arrangement of molecules in the tetragonal P43212 space group. In addition, the way in which the co-operative effects of those weak bonds might modify their relative influence on molecular packing was estimated from cluster calculations. Based on the results, a structural model is proposed which helps to rationalize the unusual fourfold screw molecular arrangement.
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Affiliation(s)
- Fernando García-Reyes
- IFLP (CONICET, CCT-La Plata) - Departamento de Física, Facultad de Ciencias Exactas, Universidad Nacional de La Plata, 115 y 49, 1900 La Plata, Argentina
| | - Adolfo C Fantoni
- IFLP (CONICET, CCT-La Plata) - Departamento de Física, Facultad de Ciencias Exactas, Universidad Nacional de La Plata, 115 y 49, 1900 La Plata, Argentina
| | - Máximo Barón
- Facultad de Ciencias Exactas y Naturales, Universidad de Belgrano, Villanueva 1324, 1426 Buenos Aires, Argentina
| | - Rosana M Romano
- CEQUINOR (UNLP-CONICET, CCT-La Plata), Departamento de Química, Facultad de Ciencias Exactas, Universidad Nacional de La Plata, 1900 La Plata, Argentina
| | - Graciela M Punte
- IFLP (CONICET, CCT-La Plata) - Departamento de Física, Facultad de Ciencias Exactas, Universidad Nacional de La Plata, 115 y 49, 1900 La Plata, Argentina
| | - Gustavo A Echeverría
- IFLP (CONICET, CCT-La Plata) - Departamento de Física, Facultad de Ciencias Exactas, Universidad Nacional de La Plata, 115 y 49, 1900 La Plata, Argentina
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15
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Moreno Betancourt A, Schwabedissen J, Romano RM, Della Védova CO, Beckers H, Willner H, Stammler HG, Mitzel NW. Disulfuryl Dichloride ClSO 2 OSO 2 Cl: A Conformation and Polymorphism Chameleon. Chemistry 2018; 24:10409-10421. [PMID: 29709088 DOI: 10.1002/chem.201800817] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/16/2018] [Indexed: 11/05/2022]
Abstract
Disulfuryl dichloride ClSO2 OSO2 Cl was characterized by vibrational spectroscopy in the gaseous and liquid phase as well as in the Ar-matrix. By varying the temperature, certain bands could be assigned to several conformers. Gas-phase electron diffraction revealed a dominance of the anti-conformer at ambient temperature. The same conformation was found in the solid state. Via the in situ technique for crystallization, not less than four different modifications were identified. Among these different modifications, the structural parameters of the molecules remain relatively constant, but the aggregation pattern changes. Although the molecules aggregate by chlorine⋅⋅⋅oxygen contacts in each modification, the geometrical parameters of these interaction show significant differences and were evaluated and are in part inconsistent with the halogen bonding concept.
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Affiliation(s)
- Angélica Moreno Betancourt
- CEQUINOR (UNLP-CONICET, CCT La Plata), Departamento de Química, Facultad de Ciencias Exactas, Universidad Nacional de La Plata, La Plata, CP 1900, Argentina
| | - Jan Schwabedissen
- Fakultät für Chemie, Lehrstuhl für Anorganische Chemie und Strukturchemie, Centrum für molekulare Materialien CM2, Universität Bielefeld, Universitätsstr. 25, 33615, Bielefeld, Germany
| | - Rosana M Romano
- CEQUINOR (UNLP-CONICET, CCT La Plata), Departamento de Química, Facultad de Ciencias Exactas, Universidad Nacional de La Plata, La Plata, CP 1900, Argentina
| | - Carlos O Della Védova
- CEQUINOR (UNLP-CONICET, CCT La Plata), Departamento de Química, Facultad de Ciencias Exactas, Universidad Nacional de La Plata, La Plata, CP 1900, Argentina
| | - Helmut Beckers
- Institut für Chemie und Biochemie, Anorganische Chemie, Freie Universität Berlin, Fabeckstraße 34-36, 14195, Berlin, Germany
| | - Helge Willner
- FB C-Anorganische Chemie, Bergische Universität Wuppertal, Gaußstraße 20, 42097, Wuppertal, Germany
| | - Hans-Georg Stammler
- Fakultät für Chemie, Lehrstuhl für Anorganische Chemie und Strukturchemie, Centrum für molekulare Materialien CM2, Universität Bielefeld, Universitätsstr. 25, 33615, Bielefeld, Germany
| | - Norbert W Mitzel
- Fakultät für Chemie, Lehrstuhl für Anorganische Chemie und Strukturchemie, Centrum für molekulare Materialien CM2, Universität Bielefeld, Universitätsstr. 25, 33615, Bielefeld, Germany
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16
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Seng S, Picone AL, Bava YB, Juncal LC, Moreau M, Ciuraru R, George C, Romano RM, Sobanska S, Tobon YA. Photodegradation of methyl thioglycolate particles as a proxy for organosulphur containing droplets. Phys Chem Chem Phys 2018; 20:19416-19423. [DOI: 10.1039/c7cp08658j] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Photochemical generation of elemental sulphur and sulphate at the gas–liquid interface by heterogeneous interaction with gaseous O2and H2O.
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17
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Cavallin MD, Wilk R, Oliveira IM, Cardoso NCS, Khalil NM, Oliveira CA, Romano MA, Romano RM. The hypothalamic-pituitary-testicular axis and the testicular function are modulated after silver nanoparticle exposure. Toxicol Res (Camb) 2018; 7:102-116. [PMID: 30090567 PMCID: PMC6060733 DOI: 10.1039/c7tx00236j] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/31/2017] [Accepted: 11/22/2017] [Indexed: 01/28/2023] Open
Abstract
Silver nanoparticles (AgNPs) are widely used in industrial and medical applications and humans may be exposed through different routes, increasing the risk of toxicity. We investigated the transcript expression of genes involved in the regulation of the hypothalamic-pituitary-testicular (HPT) axis and the parameters associated with sperm functionality after prepubertal exposure. AgNPs modulated the transcript expression of genes involved in the control of the HPT axis and spermatogenesis in the groups treated with lower doses, while the functional parameters related to sperm and puberty were affected in the groups administered higher doses. These results suggest that the HPT axis is disrupted by AgNPs during the prepubertal and pubertal periods, which are highly susceptible windows for the endocrine-disrupting chemical activity.
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Affiliation(s)
- M D Cavallin
- Laboratory of Reproductive Toxicology , Department of Pharmacy , State University of Centro-Oeste , Rua Simeao Camargo Varela de Sa , 03 , 85040-080 , Parana , Brazil .
| | - R Wilk
- Laboratory of Reproductive Toxicology , Department of Pharmacy , State University of Centro-Oeste , Rua Simeao Camargo Varela de Sa , 03 , 85040-080 , Parana , Brazil .
| | - I M Oliveira
- Laboratory of Reproductive Toxicology , Department of Pharmacy , State University of Centro-Oeste , Rua Simeao Camargo Varela de Sa , 03 , 85040-080 , Parana , Brazil .
| | - N C S Cardoso
- Laboratory of Reproductive Toxicology , Department of Pharmacy , State University of Centro-Oeste , Rua Simeao Camargo Varela de Sa , 03 , 85040-080 , Parana , Brazil .
| | - N M Khalil
- Laboratory of Nanotechnology , Department of Pharmacy , State University of Centro-Oeste , Rua Simeao Camargo Varela de Sa , 03 , 85040-080 , Parana , Brazil
| | - C A Oliveira
- Laboratory of Hormonal Dosages , Department of Animal Reproduction , Faculty of Veterinary Medicine , University of Sao Paulo , Av. Prof. Dr. Orlando Marques de Paiva , 87 , 05508-270 , Sao Paulo , Brazil
| | - M A Romano
- Laboratory of Reproductive Toxicology , Department of Pharmacy , State University of Centro-Oeste , Rua Simeao Camargo Varela de Sa , 03 , 85040-080 , Parana , Brazil .
| | - R M Romano
- Laboratory of Reproductive Toxicology , Department of Pharmacy , State University of Centro-Oeste , Rua Simeao Camargo Varela de Sa , 03 , 85040-080 , Parana , Brazil .
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18
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Rodríguez Pirani LS, Della Védova CO, Geronés M, Romano RM, Cavasso-Filho R, Ge M, Ma C, Erben MF. Electronic Properties and Dissociative Photoionization of Thiocyanates, Part III. The Effect of the Group’s Electronegativity in the Valence and Shallow-Core (Sulfur and Chlorine 2p) Regions of CCl 3SCN and CCl 2FSCN. J Phys Chem A 2017; 121:9201-9210. [DOI: 10.1021/acs.jpca.7b08395] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Lucas S. Rodríguez Pirani
- CEQUINOR
(UNLP − CONICET, CCT La Plata), Departamento de Química,
Facultad de Ciencias Exactas, Universidad Nacional de La Plata, Boulevard 120 e/60 y 64 No. 1465, La Plata CP 1900, República Argentina
| | - Carlos O. Della Védova
- CEQUINOR
(UNLP − CONICET, CCT La Plata), Departamento de Química,
Facultad de Ciencias Exactas, Universidad Nacional de La Plata, Boulevard 120 e/60 y 64 No. 1465, La Plata CP 1900, República Argentina
| | - Mariana Geronés
- CEQUINOR
(UNLP − CONICET, CCT La Plata), Departamento de Química,
Facultad de Ciencias Exactas, Universidad Nacional de La Plata, Boulevard 120 e/60 y 64 No. 1465, La Plata CP 1900, República Argentina
| | - Rosana M. Romano
- CEQUINOR
(UNLP − CONICET, CCT La Plata), Departamento de Química,
Facultad de Ciencias Exactas, Universidad Nacional de La Plata, Boulevard 120 e/60 y 64 No. 1465, La Plata CP 1900, República Argentina
| | - Reinaldo Cavasso-Filho
- Universidade Federal do ABC, Rua Catequese,
242, CEP 09090-400 Santo André, São Paulo, Brazil
| | - Maofa Ge
- State
Key Laboratory for Structural Chemistry of Unstable and Stable Species,
Beijing National Laboratory for Molecular Sciences (BNLMS), Institute
of Chemistry, Chinese Academy of Sciences, Beijing 100190, Peoples Republic of China
| | - Chunping Ma
- State
Key Laboratory for Structural Chemistry of Unstable and Stable Species,
Beijing National Laboratory for Molecular Sciences (BNLMS), Institute
of Chemistry, Chinese Academy of Sciences, Beijing 100190, Peoples Republic of China
| | - Mauricio F. Erben
- CEQUINOR
(UNLP − CONICET, CCT La Plata), Departamento de Química,
Facultad de Ciencias Exactas, Universidad Nacional de La Plata, Boulevard 120 e/60 y 64 No. 1465, La Plata CP 1900, República Argentina
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19
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Bava YB, Tamone LM, Juncal LC, Seng S, Tobón YA, Sobanska S, Picone AL, Romano RM. Gas-phase and matrix-isolation photochemistry of methyl thioglycolate, CH 3 OC(O)CH 2 SH: Influence of the presence of molecular oxygen in the photochemical mechanisms. J Photochem Photobiol A Chem 2017. [DOI: 10.1016/j.jphotochem.2017.05.003] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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20
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Juncal LC, Avila J, Asensio MC, Della Védova CO, Romano RM. Electronic structure determination using an assembly of conventional and synchrotron techniques: The case of a xanthate complex. Spectrochim Acta A Mol Biomol Spectrosc 2017; 180:183-192. [PMID: 28285243 DOI: 10.1016/j.saa.2017.03.002] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/10/2016] [Revised: 02/26/2017] [Accepted: 03/01/2017] [Indexed: 06/06/2023]
Abstract
The electronic properties of the coordination complex nickel (II) bis-n-propylxanthate, Ni(CH3(CH2)2OC(S)S)2, were studied by a combination of complementary experimental (both laboratory and synchrotron based techniques) and theoretical methods. Energy differences between HOMOs and LUMOs were determined from UV-visible spectroscopy. The assignment of the transitions were performed with the aid of TD-DFT calculations and based in symmetry considerations. The analysis of the Raman excitation profiles of selected vibrational modes of the complex, taken in resonance with a particular electronic transition, was found to reinforce the electronic assignment. Experimental binding energies of inner and core electrons were determined by PES measurements. Ni K-edge, S K-edge, Ni L-edge, O K-edge and C K-edge XANES spectra were interpreted in terms of the promotion of core electrons to unoccupied electronic levels. An experimental quantitative molecular orbital diagram was constructed using the information extracted from the different techniques.
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Affiliation(s)
- Luciana C Juncal
- CEQUINOR (UNLP, CCT-CONICET La Plata), Departamento de Química, Facultad de Ciencias Exactas, Universidad Nacional de La Plata, Blvd. 120 N° 1465, CC 962, La Plata CP 1900, Argentina
| | - José Avila
- Synchrotron SOLEIL, Orme des Merisiers - Saint Aubin BP 48, 91192 Gif sur Yvette Cedex, France
| | - Maria Carmen Asensio
- Synchrotron SOLEIL, Orme des Merisiers - Saint Aubin BP 48, 91192 Gif sur Yvette Cedex, France
| | - Carlos O Della Védova
- CEQUINOR (UNLP, CCT-CONICET La Plata), Departamento de Química, Facultad de Ciencias Exactas, Universidad Nacional de La Plata, Blvd. 120 N° 1465, CC 962, La Plata CP 1900, Argentina
| | - Rosana M Romano
- CEQUINOR (UNLP, CCT-CONICET La Plata), Departamento de Química, Facultad de Ciencias Exactas, Universidad Nacional de La Plata, Blvd. 120 N° 1465, CC 962, La Plata CP 1900, Argentina.
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21
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Cozzarín MV, Romano RM. Unimolecular Photochemical Mechanisms of FC(O)SSCl Isolated in Solid Ar. ChemistrySelect 2017. [DOI: 10.1002/slct.201700534] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Affiliation(s)
- Melina V. Cozzarín
- CEQUINOR (UNLP, CCT-CONICET La Plata), Departamento de Química, Facultad de Ciencias Exactas; Universidad Nacional de La Plata; Blvd. 120 N° 1465 La Plata (CP 1900) Argentina
| | - Rosana M. Romano
- CEQUINOR (UNLP, CCT-CONICET La Plata), Departamento de Química, Facultad de Ciencias Exactas; Universidad Nacional de La Plata; Blvd. 120 N° 1465 La Plata (CP 1900) Argentina
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22
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Gómez Castaño JA, Romano RM, Della Védova CO, Willner H. Photochemical Reaction of OCSe with ClF in Argon Matrix: A Light-Driven Formation of XC(O)SeY (X, Y = F or Cl) Species. J Phys Chem A 2017; 121:2878-2887. [PMID: 28363016 DOI: 10.1021/acs.jpca.6b12448] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
The photochemistry of OCSe with ClF trapped together in argon matrices at cryogenic temperatures has been explored and the first interhalogen representatives of the elusive XC(O)SeY family, namely syn-ClC(O)SeF, anti-ClC(O)SeF, syn-FC(O)SeCl, and anti-FC(O)SeCl, as well as the hitherto triatomic species ClSeF complexed by a CO molecule, were obtained. Both ClC(O)SeF conformers appear to be produced independently by photolysis of the respective precursors; while formation of both FC(O)SeCl structures is ruled by the presence of an angular molecular complex OCSe···Cl-F formed prior to photolysis. This latter photochemical pathway seems to favor the formation of the less stable anti-FC(O)SeCl structure instead of the more stable syn- one. With the aid of quantum chemical calculations, using ab initio, DFT, TDDFT, and CASSCF methods, the mechanism for this photochemical reaction is rationalized both in terms of radical processes as well as a photoinduced electron transfer occurring into the OCSe···Cl-F complex. Also a singlet-triplet conical intersection between anti and syn rotamers of the FC(O)SeCl molecule is theoretically explored.
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Affiliation(s)
- Jovanny A Gómez Castaño
- CEQUINOR (UNLP, CCT-CONICET La Plata). Departamento de Química, Facultad de Ciencias Exactas, Universidad Nacional de La Plata . Boulevard 120 No. 1465, CC 962, La Plata (CP 1900), Argentina.,Laboratorio de Química Teórica y Computacional, Grupo Química-Física Molecular y Modelamiento Computacional (QUIMOL), Facultad de Ciencias, Universidad Pedagógica y Tecnológica de Colombia (UPTC) , Avenida Central del Norte, Tunja, Boyacá, Colombia
| | - Rosana M Romano
- CEQUINOR (UNLP, CCT-CONICET La Plata). Departamento de Química, Facultad de Ciencias Exactas, Universidad Nacional de La Plata . Boulevard 120 No. 1465, CC 962, La Plata (CP 1900), Argentina
| | - Carlos O Della Védova
- CEQUINOR (UNLP, CCT-CONICET La Plata). Departamento de Química, Facultad de Ciencias Exactas, Universidad Nacional de La Plata . Boulevard 120 No. 1465, CC 962, La Plata (CP 1900), Argentina
| | - Helge Willner
- Anorganische Chemie, Bergische Universität Wuppertal , Gaußstraße 20, D-42097 Wuppertal, Germany
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23
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Affiliation(s)
- Rosana M. Romano
- CEQUINOR (UNLP, CCT-CONICET); Departamento de Química; Facultad de Ciencias Exactas; Universidad Nacional de La Plata; Boulevard 120 N° 1465 (1900) La Plata Argentina
| | - Rodrigo Stephani
- Núcleo de Espectroscopia e Estrutura Molecular; Departamento de Química; Universidade Federal de Juiz de Fora; 36036-330 Juiz de Fora, MG República Federativa do Brasil
| | - Luiz F. Cappa de Oliveira
- Núcleo de Espectroscopia e Estrutura Molecular; Departamento de Química; Universidade Federal de Juiz de Fora; 36036-330 Juiz de Fora, MG República Federativa do Brasil
| | - Carlos O. Della Védova
- CEQUINOR (UNLP, CCT-CONICET); Departamento de Química; Facultad de Ciencias Exactas; Universidad Nacional de La Plata; Boulevard 120 N° 1465 (1900) La Plata Argentina
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24
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Cánneva A, Filho RLC, Romano RM, Della Védova CO, Tong S, Ge M, Erben MF. Electronic Properties and Ionic Photodissociation of Thionitrite Compounds RSNO [R=(CH 3) 3C- and (CH 3) 2CH-]. ChemistrySelect 2017. [DOI: 10.1002/slct.201602002] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Affiliation(s)
- Antonela Cánneva
- CEQUINOR (UNLP-CONICET, CCT, La Plata); Departamento de Química; Facultad de Ciencias Exactas; Universidad Nacional de La Plata; Bv. 120 Nro. 1465 La Plata (CP 1900 República Argentina
| | | | - Rosana M. Romano
- CEQUINOR (UNLP-CONICET, CCT, La Plata); Departamento de Química; Facultad de Ciencias Exactas; Universidad Nacional de La Plata; Bv. 120 Nro. 1465 La Plata (CP 1900 República Argentina
| | - Carlos O. Della Védova
- CEQUINOR (UNLP-CONICET, CCT, La Plata); Departamento de Química; Facultad de Ciencias Exactas; Universidad Nacional de La Plata; Bv. 120 Nro. 1465 La Plata (CP 1900 República Argentina
| | - Shengrui Tong
- State Key Laboratory for Structural Chemistry of Unstable and Stable Species; Beijing National Laboratory for Molecular Sciences (BNLMS); Institute of Chemistry; Chinese Academy of Sciences; Beijing 100190 People's Republic of China
| | - Maofa Ge
- State Key Laboratory for Structural Chemistry of Unstable and Stable Species; Beijing National Laboratory for Molecular Sciences (BNLMS); Institute of Chemistry; Chinese Academy of Sciences; Beijing 100190 People's Republic of China
| | - Mauricio F. Erben
- CEQUINOR (UNLP-CONICET, CCT, La Plata); Departamento de Química; Facultad de Ciencias Exactas; Universidad Nacional de La Plata; Bv. 120 Nro. 1465 La Plata (CP 1900 República Argentina
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Affiliation(s)
- Melina V. Cozzarín
- CEQUINOR (UNLP, CCT‐CONICET La Plata). Departamento de Química Facultad de Ciencias Exactas Universidad Nacional de La Plata Blvd. 120 No. 1465, CC 962 (CP 1900) La Plata República Argentina
| | - Shengrui Tong
- State Key Laboratory for Structural Chemistry of Unstable and Stable Species Beijing National Laboratory for Molecular Sciences (BNLMS) Institute of Chemistry Chinese Academy of Sciences 100190 Beijing Peoples Republic of China
| | - Mao‐Fa Ge
- State Key Laboratory for Structural Chemistry of Unstable and Stable Species Beijing National Laboratory for Molecular Sciences (BNLMS) Institute of Chemistry Chinese Academy of Sciences 100190 Beijing Peoples Republic of China
| | - Carlos O. Della Védova
- CEQUINOR (UNLP, CCT‐CONICET La Plata). Departamento de Química Facultad de Ciencias Exactas Universidad Nacional de La Plata Blvd. 120 No. 1465, CC 962 (CP 1900) La Plata República Argentina
| | - Rosana M. Romano
- CEQUINOR (UNLP, CCT‐CONICET La Plata). Departamento de Química Facultad de Ciencias Exactas Universidad Nacional de La Plata Blvd. 120 No. 1465, CC 962 (CP 1900) La Plata República Argentina
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Betancourt AM, Bava YB, Erben MF, Cavasso Filho RL, Tong S, Ge M, Della Védova CO, Romano RM. Electronic properties and photofragmentation mechanisms of pyrosulfuryl chloride, ClSO2OSO2Cl. J Photochem Photobiol A Chem 2016. [DOI: 10.1016/j.jphotochem.2016.03.019] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
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Gómez Castaño JA, Romano RM, Salamanca AR, Amésquita G, Beckers H, Willner H, Della Védova CO. Vibrational spectra, conformational properties and argon matrix photochemistry of diacetyl diselenide, CH3C(O)Se2C(O)CH3. J PHYS ORG CHEM 2016. [DOI: 10.1002/poc.3587] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/31/2023]
Affiliation(s)
- Jovanny A. Gómez Castaño
- CEQUINOR (UNLP-CONICET), Departamento de Química, Facultad de Ciencias Exactas; Universidad Nacional de La Plata; 47 esq. 115 1900 La Plata Argentina
- Laboratorio de Química Teórica y Computacional, Grupo de Investigación Química-Física Molecular y Modelamiento Computacional (QUIMOL), Facultad de Ciencias; Universidad Pedagógica y Tecnológica de Colombia (UPTC); Avenida Central del Norte Tunja Boyacá Colombia
| | - Rosana M. Romano
- CEQUINOR (UNLP-CONICET), Departamento de Química, Facultad de Ciencias Exactas; Universidad Nacional de La Plata; 47 esq. 115 1900 La Plata Argentina
| | - Ana R. Salamanca
- Laboratorio de Química Teórica y Computacional, Grupo de Investigación Química-Física Molecular y Modelamiento Computacional (QUIMOL), Facultad de Ciencias; Universidad Pedagógica y Tecnológica de Colombia (UPTC); Avenida Central del Norte Tunja Boyacá Colombia
| | - Germán Amésquita
- Grupo de Investigación en Informática, Electrónica y Comunicaciones (INFELCOM), Facultad de Ingenieria; Universidad Pedagógica y Tecnológica de Colombia (UPTC); Avenida Central del Norte Tunja Boyacá Colombia
| | - Helmut Beckers
- Anorganische Chemie; Bergische Universität Wuppertal; Gaußstr. 20 D-42097 Wuppertal Germany
| | - Helge Willner
- Anorganische Chemie; Bergische Universität Wuppertal; Gaußstr. 20 D-42097 Wuppertal Germany
| | - Carlos O. Della Védova
- CEQUINOR (UNLP-CONICET), Departamento de Química, Facultad de Ciencias Exactas; Universidad Nacional de La Plata; 47 esq. 115 1900 La Plata Argentina
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Berrueta Martínez Y, Reuter CG, Vishnevskiy YV, Bava YB, Picone AL, Romano RM, Stammler HG, Neumann B, Mitzel NW, Della Védova CO. Structural Analysis of Perfluoropropanoyl Fluoride in the Gas, Liquid, and Solid Phases. J Phys Chem A 2016; 120:2420-30. [PMID: 27023801 DOI: 10.1021/acs.jpca.6b00424] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
The coexistence of two conformers in perfluoropropanoyl fluoride, CF3CF2C(O)F, differing in the CC-CF dihedral angle (gauche 85(10)% and anti 15(10)%), has been determined by means of gas-phase electron diffraction (GED). Quantum-chemical calculations performed at the MP2 and B3LYP approximations and cc-pVTZ basis sets reproduce the experimental values with confidence. By contrast, FTIR spectra give no clear evidence for the anti-conformer in the gas phase. Information on this less abundant but stable rotamer is obtained from matrix-isolation/FTIR spectroscopy and liquid Raman spectroscopy. In situ crystallization and single-crystal X-ray diffraction (XRD) data reveal the presence of solely the gauche-conformation in the solid state. A set of intermolecular interactions including C═O···C═O, C-F···F-C, and F···C═O is detected. The nature of bonding and the relative stabilities of gauche- and anti-conformers are explored using natural bond orbitals.
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Affiliation(s)
- Yanina Berrueta Martínez
- CEQUINOR (UNLP-CONICET), Departamento de Química, Facultad de Ciencias Exactas, Universidad Nacional de La Plata , 47 esq. 115, 1900 La Plata, República Argentina
| | - Christian G Reuter
- Lehrstuhl für Anorganische Chemie und Strukturchemie, Centre for Molecular Materials CM2, Bielefeld University , Universitätsstraße 25, 33615 Bielefeld, Germany
| | - Yury V Vishnevskiy
- Lehrstuhl für Anorganische Chemie und Strukturchemie, Centre for Molecular Materials CM2, Bielefeld University , Universitätsstraße 25, 33615 Bielefeld, Germany
| | - Yanina B Bava
- CEQUINOR (UNLP-CONICET), Departamento de Química, Facultad de Ciencias Exactas, Universidad Nacional de La Plata , 47 esq. 115, 1900 La Plata, República Argentina
| | - A Lorena Picone
- CEQUINOR (UNLP-CONICET), Departamento de Química, Facultad de Ciencias Exactas, Universidad Nacional de La Plata , 47 esq. 115, 1900 La Plata, República Argentina
| | - Rosana M Romano
- CEQUINOR (UNLP-CONICET), Departamento de Química, Facultad de Ciencias Exactas, Universidad Nacional de La Plata , 47 esq. 115, 1900 La Plata, República Argentina
| | - Hans-Georg Stammler
- Lehrstuhl für Anorganische Chemie und Strukturchemie, Centre for Molecular Materials CM2, Bielefeld University , Universitätsstraße 25, 33615 Bielefeld, Germany
| | - Beate Neumann
- Lehrstuhl für Anorganische Chemie und Strukturchemie, Centre for Molecular Materials CM2, Bielefeld University , Universitätsstraße 25, 33615 Bielefeld, Germany
| | - Norbert W Mitzel
- Lehrstuhl für Anorganische Chemie und Strukturchemie, Centre for Molecular Materials CM2, Bielefeld University , Universitätsstraße 25, 33615 Bielefeld, Germany
| | - Carlos O Della Védova
- CEQUINOR (UNLP-CONICET), Departamento de Química, Facultad de Ciencias Exactas, Universidad Nacional de La Plata , 47 esq. 115, 1900 La Plata, República Argentina
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Moreno Betancourt A, Bava YB, Berrueta Martínez Y, Erben MF, Cavasso Filho RL, Della Védova CO, Romano RM. Photofragmentation Mechanisms of Chlorosulfonyl Isocyanate, ClSO2NCO, Excited with Synchrotron Radiation between 12 and 550 eV. J Phys Chem A 2015; 119:8021-30. [PMID: 26121558 DOI: 10.1021/acs.jpca.5b02396] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
The unimolecular photofragmentation mechanisms of chlorosulfonyl isocyanate, ClSO2NCO, excited with tunable synchrotron radiation between 12 and 550 eV, were investigated by means of time-of-flight (TOF) coincidence techniques. The main fragmentation mechanism after single ionization, produced by irradiation of an effusive beam of the sample with synchrotron light in the valence electron region, occurs through the breaking of the Cl-S single bond, giving a chloride radical and a SO2NCO(+) fragment. This mechanism contrasts with the one observed for the related FSO2NCO, in which the rupture of the S-N bond originates the FSO2(+) fragment. The energies of the shallow- (S 2p, Cl 2p, and S 2s) and core-shell (C 1s, N 1s, and O 1s) electrons were determined by X-ray absorption. Transitions between these shallow and core electrons to unoccupied molecular orbitals were also observed in the total ion yield (TIY) spectra. Fourteen different fragmentation mechanisms of the doubly charged parent ion, ClSO2NCO(2+), were inferred from the bidimensional photoelectron-photoion-photoion-coincidence (PEPIPICO) spectra. The rupture of the S-N bond can evolve to form NCO(+)/SO2(•+), NCO(+)/SO(•+), or S(•+)/NCO(+) pairs of ions. The Cl-S bond breaking originates different mechanisms, Cl(+)/SO(•+), Cl(+)/S(•+), CO(•+)/S(•+), O(•+)/SO(•+), O(•+)/Cl(+), O(•+)/S(•+), C(•+)/S(•+), and C(•+)/O(•+) pairs being detected in coincidence as the final species. Another three coincidence islands can only be explained with an initial atomic rearrangement forming ClNCO(2+), ONCO(2+), and ClCO(2+), as precursors of CO(•+)/Cl(+), O(•+)/CO(•+), and C(•+)/Cl(+) pairs, respectively. The formation of Cl(•) radical is deduced from several mechanisms.
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Affiliation(s)
- Angélica Moreno Betancourt
- †CEQUINOR (UNLP-CONICET, CCT La Plata), Departamento de Química, Facultad de Ciencias Exactas, Universidad Nacional de La Plata, CC 962, La Plata CP 1900, Argentina
| | - Yanina B Bava
- †CEQUINOR (UNLP-CONICET, CCT La Plata), Departamento de Química, Facultad de Ciencias Exactas, Universidad Nacional de La Plata, CC 962, La Plata CP 1900, Argentina
| | - Yanina Berrueta Martínez
- †CEQUINOR (UNLP-CONICET, CCT La Plata), Departamento de Química, Facultad de Ciencias Exactas, Universidad Nacional de La Plata, CC 962, La Plata CP 1900, Argentina
| | - Mauricio F Erben
- †CEQUINOR (UNLP-CONICET, CCT La Plata), Departamento de Química, Facultad de Ciencias Exactas, Universidad Nacional de La Plata, CC 962, La Plata CP 1900, Argentina
| | | | - Carlos O Della Védova
- †CEQUINOR (UNLP-CONICET, CCT La Plata), Departamento de Química, Facultad de Ciencias Exactas, Universidad Nacional de La Plata, CC 962, La Plata CP 1900, Argentina
| | - Rosana M Romano
- †CEQUINOR (UNLP-CONICET, CCT La Plata), Departamento de Química, Facultad de Ciencias Exactas, Universidad Nacional de La Plata, CC 962, La Plata CP 1900, Argentina
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Geronés M, Rodríguez Pirani LS, Erben MF, Romano RM, Cavasso Filho RL, Tong SR, Ge M, Della Védova CO. Photoelectron Spectroscopy and Ionic Fragmentation of OSeCl 2 and Its Analogue OSCl 2 under VUV Irradiation. J Phys Chem A 2015; 119:8000-9. [DOI: 10.1021/acs.jpca.5b02162] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Mariana Geronés
- CEQUINOR
(CONICET-UNLP), Departamento de Química, Facultad de Ciencias
Exactas, Universidad Nacional de La Plata, C. C. 962 (1900) La Plata, República Argentina
| | - Lucas S. Rodríguez Pirani
- CEQUINOR
(CONICET-UNLP), Departamento de Química, Facultad de Ciencias
Exactas, Universidad Nacional de La Plata, C. C. 962 (1900) La Plata, República Argentina
| | - Mauricio F. Erben
- CEQUINOR
(CONICET-UNLP), Departamento de Química, Facultad de Ciencias
Exactas, Universidad Nacional de La Plata, C. C. 962 (1900) La Plata, República Argentina
| | - Rosana M. Romano
- CEQUINOR
(CONICET-UNLP), Departamento de Química, Facultad de Ciencias
Exactas, Universidad Nacional de La Plata, C. C. 962 (1900) La Plata, República Argentina
| | | | - Sheng Rui Tong
- State
Key Laboratory for Structural Chemistry of Unstable and Stable Species,
Beijing National Laboratory for Molecular Sciences (BNLMS), Institute
of Chemistry, Chinese Academy of Sciences, Beijing 100080, People’s Republic of China
| | - Maofa Ge
- State
Key Laboratory for Structural Chemistry of Unstable and Stable Species,
Beijing National Laboratory for Molecular Sciences (BNLMS), Institute
of Chemistry, Chinese Academy of Sciences, Beijing 100080, People’s Republic of China
| | - Carlos O. Della Védova
- CEQUINOR
(CONICET-UNLP), Departamento de Química, Facultad de Ciencias
Exactas, Universidad Nacional de La Plata, C. C. 962 (1900) La Plata, República Argentina
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Canneva A, Erben MF, Romano RM, Vishnevskiy YV, Reuter CG, Mitzel NW, Della Védova CO. The Structure and Conformation of (CH3)3CSNO. Chemistry 2015; 21:10436-42. [DOI: 10.1002/chem.201500811] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/27/2015] [Indexed: 12/16/2022]
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Juncal LC, Cozzarín MV, Romano RM. Conformational and spectroscopic study of xanthogen ethyl formates, ROC(S)SC(O)OCH₂CH₃. Isolation of CH₃CH₂OC(O)SH. Spectrochim Acta A Mol Biomol Spectrosc 2015; 139:346-355. [PMID: 25574655 DOI: 10.1016/j.saa.2014.12.086] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/29/2014] [Revised: 12/07/2014] [Accepted: 12/17/2014] [Indexed: 06/04/2023]
Abstract
ROC(S)SC(O)OCH2CH3, with R=CH3-, (CH3)2CH- and CH3(CH2)2-, were obtained through the reaction between potassium xanthate salts, ROC(S)SK, and ethyl chloroformate, ClC(O)OCH2CH3. The liquid compounds were identified and characterized by (1)H and (13)C NMR and mass spectrometry. The conformations adopted by the molecules were studied by DFT methods. 6 conformers were theoretically predicted for R=CH3- and (CH3)2CH-, while the conformational flexibility of the n-propyl substituent increases the total number of feasible rotamers to 21. For the three molecules, the conformers can be associated in 3 groups, being the most stable the AS forms - the C=S double bond anti (A) with respect to the C-S single bond and the S-C single bond syn (S) with respect to the C=O double bond - followed by AA and SS conformers. The vibrational spectra were interpreted in terms of the predicted conformational equilibrium, presenting the ν(C=O) spectral region signals corresponding to the three groups of conformers. A moderated pre-resonance Raman enhancement of the ν(C=S) vibrational mode of CH3(CH2)2OC(S)SC(O)OCH2CH3 was detected, when the excitation radiation approaches the energy of a n→π∗ electronic transition associated with the C=S chromophore. UV-visible spectra in different solvents were measured and interpreted in terms of TD-DFT calculations. The unknown molecule CH3CH2OC(O)SH was isolated by the UV-visible photolysis of CH3OC(S)SC(O)OCH2CH3 isolated in Ar matrix, and also obtained as a side-product of the reaction between potassium xanthate salts, ROC(S)SK, and ethyl chloroformate, ClC(O)OCH2CH3.
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Affiliation(s)
- Luciana C Juncal
- CEQUINOR (CONICET-UNLP), Departamento de Química, Facultad de Ciencias Exactas, Universidad Nacional de La Plata, 47 esq. 115, (1900) La Plata, Argentina
| | - Melina V Cozzarín
- CEQUINOR (CONICET-UNLP), Departamento de Química, Facultad de Ciencias Exactas, Universidad Nacional de La Plata, 47 esq. 115, (1900) La Plata, Argentina
| | - Rosana M Romano
- CEQUINOR (CONICET-UNLP), Departamento de Química, Facultad de Ciencias Exactas, Universidad Nacional de La Plata, 47 esq. 115, (1900) La Plata, Argentina.
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Berrueta Martínez Y, Bava YB, Erben MF, Cavasso Filho RL, Romano RM, Della Védova CO. Photoexcitation, photoionization, and photofragmentantion of CF3CF2CF2C(O)Cl using synchrotron radiation between 13 and 720 eV. J Phys Chem A 2015; 119:1894-905. [PMID: 25679054 DOI: 10.1021/jp5122504] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Abstract
The main inner shell ionization edges of gaseous CF3CF2CF2C(O)Cl, including Cl 2p, C 1s, O 1s, and F 1s, have been measured in Total Ion Yield (TIY) mode by using tunable synchrotron radiation, and several resonance transitions have been assigned with the help of quantum chemical calculations. Interestingly, resonance transitions observed in the C 1s region can be assigned to different carbon atoms in the molecule according to the degree of fluorine substitution. Ionic photofragmentation processes have been studied by time-of-flight mass spectrometry in the Photoelectron-Photoion-Coincidence (PEPICO) and Photoelectron-Photoion-Photoion-Coincidence (PEPIPICO) modes. These techniques revealed a "memory-lost" effect especially around the C 1s region, since the fragmentation events are independent of the energy range considered. Moreover, different fragmentation mechanisms were inferred from these spectra in the valence (13.0-21.0 eV) as well as in the inner (180.0-750.0 eV) electronic energy regions. The vibrational spectral features of CF3CF2CF2C(O)Cl have been interpreted in terms of a conformational equilibrium between two conformations (gauche and anti of the CC single bond with respect to the CCl one) at room temperature, as determined from quantum chemical calculations and the detailed analysis of the infrared spectrum.
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Affiliation(s)
- Yanina Berrueta Martínez
- CEQUINOR (UNLP-CONICET), Departamento de Química, Facultad de Ciencias Exactas, Universidad Nacional de La Plata , 47 esq. 115, 1900 La Plata, República Argentina
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Bava YB, Berrueta Martínez Y, Moreno Betancourt A, Erben MF, Cavasso Filho RL, Della Védova CO, Romano RM. Inside Back Cover: Ionic Fragmentation Mechanisms of 2,2,2-Trifluoroethanol Following Excitation with Synchrotron Radiation (ChemPhysChem 2/2015). Chemphyschem 2015. [DOI: 10.1002/cphc.201590010] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
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Bava YB, Berrueta Martínez Y, Moreno Betancourt A, Erben MF, Cavasso Filho RL, Della Védova CO, Romano RM. Ionic Fragmentation Mechanisms of 2,2,2-Trifluoroethanol Following Excitation with Synchrotron Radiation. Chemphyschem 2014; 16:322-30. [DOI: 10.1002/cphc.201402669] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/25/2014] [Indexed: 11/07/2022]
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Rodríguez Pirani LS, Erben MF, Willner H, Romano RM, Della Védova CO. Matrix Isolation Study of the Conformations and Photochemistry of S-Ethyl Fluorothioformate, FC(O)SCH2CH3. J Phys Chem A 2014; 118:11193-203. [DOI: 10.1021/jp507863b] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Lucas S. Rodríguez Pirani
- CEQUINOR
(CONICET-UNLP), Departamento de Química, Facultad de Ciencias
Exactas, Universidad Nacional de La Plata, C. C. 962 (1900) La Plata, República Argentina
| | - Mauricio F. Erben
- CEQUINOR
(CONICET-UNLP), Departamento de Química, Facultad de Ciencias
Exactas, Universidad Nacional de La Plata, C. C. 962 (1900) La Plata, República Argentina
| | - Helge Willner
- Fachbereich
C-Anorganische Chemie, Bergische Universität Wuppertal, Gaußstrasse
20, 47097 Wuppertal, Germany
| | - Rosana M. Romano
- CEQUINOR
(CONICET-UNLP), Departamento de Química, Facultad de Ciencias
Exactas, Universidad Nacional de La Plata, C. C. 962 (1900) La Plata, República Argentina
| | - Carlos O. Della Védova
- CEQUINOR
(CONICET-UNLP), Departamento de Química, Facultad de Ciencias
Exactas, Universidad Nacional de La Plata, C. C. 962 (1900) La Plata, República Argentina
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Rodríguez Pirani LS, Erben MF, Geronés M, Romano RM, Cavasso Filho RL, Ma C, Ge M, Della Védova CO. Electronic properties of FC(O)SCH2CH3. a combined helium(I) photoelectron spectroscopy and synchrotron radiation study. J Phys Chem A 2014; 118:5950-60. [PMID: 25019560 DOI: 10.1021/jp412564u] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Abstract
The valence electronic properties of S-ethyl flouromethanethioate (S-ethyl fluoromethsanethioate), FC(O)SCH2CH3, were investigated by means of He(I) photoelectron spectroscopy in conjunction with the analysis of the photofragmentation products determined by PEPICO (phtoelectron-photoion-coincidence) by using synchrotron radiation in the 11.1-21.6 eV photon energy range. The first band observed at 10.28 eV in the HeI photoelectron spectrum can be assigned with confidence to the ionization process from the HOMO [nπ(S) orbital], which is described as a lone pair formally localized on the sulfur atom, in agreement with quantum chemical calculations using the outer valence Green function method [OVGF/6-311++G (d,p)]. One of the most important fragmentation channels also observed in the valence region corresponds to the decarbonylation process yielding the [M-CO](·+) ion, which is clearly observed at m/z = 80. Moreover, S 2p and S 2s absorption edges have been examined by measuring the total ion yield spectra in the 160-240 eV region using variable synchrotron radiation. The dynamic of ionic fragmentation following the Auger electronic decay has been evaluated with the help of the PEPIPICO (photoion-photoion-photoelectron-coincidence spectra) technique.
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Affiliation(s)
- Lucas S Rodríguez Pirani
- CEQUINOR (CONICET-UNLP), Departamento de Química, Facultad de Ciencias Exactas, Universidad Nacional de La Plata , C. C. 962 (1900) La Plata, República Argentina
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Ramos LA, Ulic SE, Romano RM, Beckers H, Willner H, Ge M, Tong S, Della Védova CO. Dimers of perhaloacetyl cyanides: CClF2C(O)OC(CN)2CClF2 and CF3C(O)OC(CN) 2CF3. preparation, properties, and spectroscopy. J Phys Chem A 2014; 118:1721-9. [PMID: 24533467 DOI: 10.1021/jp4127732] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
The vapor of the new compound 1,1-dicyano-2-chloro-2,2-difluoroethyl chlorodifluoroacetate, CClF2C(O)OC(CN)2CClF2 and of the known 1,1-dicyano-2,2,2-trifluoroethyl trifluoroacetate, CF3C(O)OC(CN)2CF3, were investigated using vibrational spectroscopy tools. The existence of rotational isomerism was confirmed for CClF2C(O)OC(CN)2CClF2 when the matrix isolated compound was examined in combination with the computational results applying quantum chemical models. From the four conformers gauche-syn-gauche, gauche-syn-anti, syn-syn-anti, syn-syn-gauche (the used nomenclature is with respect to the ϕ(ClC-C(O)), ϕ((O)C-OC), and ϕ(OC-CCl) torsion angles, respectively) predicted for CClF2C(O)OC(CN)2CClF2 the first two forms can be evidenced using Ar-matrix IR spectroscopy, with the first one being the most abundant at room temperature. On the other side, the results obtained for CF3C(O)OC(CN)2CF3 reveals the existence of only one syn-syn-anti form. CClF2C(O)OC(CN)2CClF2 melts at -40 °C and its vapor pressure was fitted by the equation ln p = -4732.6 (1/T) + 10.75 (p [Atm], T [K]) in the range -20 to 20 °C. Its extrapolated boiling point is 167 °C. The first ionization potentials occur for CClF2C(O)OC(CN)2CClF2 and CF3C(O)OC(CN)2CF3 at 12.13 and 12.43 eV, respectively, and were attributed to the ejection of electrons formally located at the carbonylic oxygen lone-pair electrons (nO). The proposed interpretation of the photoelectron spectrum is consistent with related molecules reported previously, and also with the prediction of Outer Valence Green's Functions (OVGF).
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Affiliation(s)
- Luis A Ramos
- CEQUINOR (UNLP-CONICET), Departamento de Química, Facultad de Ciencias Exactas, Universidad Nacional de La Plata , 47 esq. 115, 1900 La Plata, República Argentina
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Ramos LA, Ulic SE, Romano RM, Beckers H, Willner H, Della Védova CO. Matrix Photochemical Study and Conformational Analysis of CH 3C(O)NCS and CF 3C(O)NCS. J Phys Chem A 2014; 118:697-707. [DOI: 10.1021/jp4110085] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
Affiliation(s)
- Luis A. Ramos
- CEQUINOR (UNLP-CONICET), Departamento de Química,
Facultad de Ciencias Exactas, Universidad Nacional de La Plata, 47 esq. 115, 1900 La Plata, República Argentina
| | - Sonia E. Ulic
- CEQUINOR (UNLP-CONICET), Departamento de Química,
Facultad de Ciencias Exactas, Universidad Nacional de La Plata, 47 esq. 115, 1900 La Plata, República Argentina
| | - Rosana M. Romano
- CEQUINOR (UNLP-CONICET), Departamento de Química,
Facultad de Ciencias Exactas, Universidad Nacional de La Plata, 47 esq. 115, 1900 La Plata, República Argentina
| | - Helmut Beckers
- Fachbereich
C - Anorganische Chemie, Bergische Universität Wuppertal, 42097 Wuppertal, Germany
| | - Helge Willner
- Fachbereich
C - Anorganische Chemie, Bergische Universität Wuppertal, 42097 Wuppertal, Germany
| | - Carlos O. Della Védova
- CEQUINOR (UNLP-CONICET), Departamento de Química,
Facultad de Ciencias Exactas, Universidad Nacional de La Plata, 47 esq. 115, 1900 La Plata, República Argentina
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Juncal LC, Tobón YA, Piro OE, Della Védova CO, Romano RM. Structural, spectroscopic and theoretical studies on dixanthogens: (ROC(S)S)2, with R = n-propyl and isopropyl. NEW J CHEM 2014. [DOI: 10.1039/c4nj00708e] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The properties of the two dixanthogens were interpreted in terms of the conformational flexibility of the n-propyl group compared with the isopropyl one.
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Affiliation(s)
- Luciana C. Juncal
- CEQUINOR (CONICET-UNLP)
- Departamento de Química
- Facultad de Ciencias Exactas
- Universidad Nacional de La Plata
- 1900 La Plata, Argentina
| | - Yeny A. Tobón
- CEQUINOR (CONICET-UNLP)
- Departamento de Química
- Facultad de Ciencias Exactas
- Universidad Nacional de La Plata
- 1900 La Plata, Argentina
| | - Oscar E. Piro
- Departamento de Física
- Facultad de Ciencias Exactas
- Universidad Nacional de La Plata and Institute IFLP (CONICET)
- 1900 La Plata, Argentina
| | - Carlos O. Della Védova
- CEQUINOR (CONICET-UNLP)
- Departamento de Química
- Facultad de Ciencias Exactas
- Universidad Nacional de La Plata
- 1900 La Plata, Argentina
| | - Rosana M. Romano
- CEQUINOR (CONICET-UNLP)
- Departamento de Química
- Facultad de Ciencias Exactas
- Universidad Nacional de La Plata
- 1900 La Plata, Argentina
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Moreno Betancourt A, Flores Antognini A, Erben MF, Cavasso-Filho R, Tong S, Ge M, Della Védova CO, Romano RM. Electronic Properties of Fluorosulfonyl Isocyanate, FSO2NCO: A Photoelectron Spectroscopy and Synchrotron Photoionization Study. J Phys Chem A 2013; 117:9179-88. [PMID: 23977899 DOI: 10.1021/jp407043c] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/05/2023]
Affiliation(s)
- Angélica Moreno Betancourt
- CEQUINOR
(UNLP−CONICET, CCT La Plata), Departamento de Química, Facultad de Ciencias Exactas, Universidad Nacional de La Plata, CC 962, La Plata (CP 1900), Argentina
| | - Andrea Flores Antognini
- INQUINOA
(CONICET-UNT) Instituto de Química Física, Facultad de Bioquímica, Química y Farmacia, Universidad Nacional de Tucumán, San Lorenzo 456, (4000) Tucumán, Argentina
| | - Mauricio F. Erben
- CEQUINOR
(UNLP−CONICET, CCT La Plata), Departamento de Química, Facultad de Ciencias Exactas, Universidad Nacional de La Plata, CC 962, La Plata (CP 1900), Argentina
| | - Reinaldo Cavasso-Filho
- Universidade Federal do ABC, Rua Catequese,
242, CEP: 09090-400, Santo André, São Paulo, Brazil
| | - Shengrui Tong
- State
Key Laboratory for Structural Chemistry of Unstable and Stable Species, Beijing National Laboratory for Molecular Sciences (BNLMS), Institute
of Chemistry, Chinese Academy of Sciences, Beijing 100190, People’s Republic of China
| | - Maofa Ge
- State
Key Laboratory for Structural Chemistry of Unstable and Stable Species, Beijing National Laboratory for Molecular Sciences (BNLMS), Institute
of Chemistry, Chinese Academy of Sciences, Beijing 100190, People’s Republic of China
| | - Carlos O. Della Védova
- CEQUINOR
(UNLP−CONICET, CCT La Plata), Departamento de Química, Facultad de Ciencias Exactas, Universidad Nacional de La Plata, CC 962, La Plata (CP 1900), Argentina
| | - Rosana M. Romano
- CEQUINOR
(UNLP−CONICET, CCT La Plata), Departamento de Química, Facultad de Ciencias Exactas, Universidad Nacional de La Plata, CC 962, La Plata (CP 1900), Argentina
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42
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Ramos LA, Ulic SE, Romano RM, Vishnevskiy YV, Mitzel NW, Beckers H, Willner H, Tong S, Ge M, Della Védova CO. Chlorodifluoroacetyl isothiocyanate, ClF2CC(O)NCS: preparation and structural and spectroscopic studies. J Phys Chem A 2013; 117:5597-606. [PMID: 23746282 DOI: 10.1021/jp403549f] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Abstract
Chlorodifluoroacetyl isothiocyanate, ClF2CC(O)NCS, was synthesized by the reaction of ClF2CC(O)Cl with an excess of AgNCS. The colorless product melts at -85 °C, and its vapor pressure follows the equation ln p = -4471.1 (1/T) + 11.35 (p [atm], T [K]) in the range -38 to 22 °C. The compound has been characterized by IR (gas phase, Ar matrix, and matrix photochemistry), by liquid Raman, by (19)F and (13)C NMR, gas UV-vis, and photoelectron spectroscopy (PES), by photoionization mass spectrometry (PIMS), and by gas electron diffraction (GED). The conformational properties of ClF2CC(O)NCS have been analyzed by joint application of vibrational spectroscopy, GED and quantum chemical calculations. The existence of two conformers has been detected in the gas and liquid phases, in which the C-Cl bond adopts a gauche orientation with respect to the C═O group; the C═O group is in syn- or anti-position with respect to the N═C double bond of the NCS group. The computed ΔG° difference between these two gauche-syn and gauche-anti forms is ΔG° = 0.63 kcal mol(-1) in the B3LYP/6-31G(d) approximation. The most significant gas-phase structural parameters for gauche-syn ClF2CC(O)NCS are re(NC═S) 1.559(2) Å, re(N═CS) 1.213(2) Å, re(N-C) 1.399(7) Å, re(C═O) 1.199(2) Å, and ∠e(CNC) 134.7(13)°. Photolysis of ClF2CC(O)NCS using an ArF excimer laser (193 nm) mainly yields ClF2CNCS, CO, and ClC(O)CF2NCS. The valence electronic properties of the title compound were studied using PES and PIMS. The experimental first vertical ionization energy of 10.43 eV corresponds to the ejection primarily of the sulfur lone-pair electrons of the in-plane nonbonding orbital on the NCS group.
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Affiliation(s)
- Luis A Ramos
- CEQUINOR (UNLP-CONICET, CCT-La Plata), Departamento de Química, Facultad de Ciencias Exactas, Universidad Nacional de La Plata, 47 esq. 115, 1900 La Plata, República Argentina
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Ramos LA, Ulic SE, Romano RM, Erben MF, Vishnevskiy YV, Reuter CG, Mitzel NW, Beckers H, Willner H, Zeng X, Bernhardt E, Ge M, Tong S, Védova. COD. Spectroscopic Characterization and Constitutional and Rotational Isomerism of ClC(O)SCN and ClC(O)NCS. J Phys Chem A 2013; 117:2383-99. [DOI: 10.1021/jp400281g] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/26/2023]
Affiliation(s)
- Luis A. Ramos
- CEQUINOR (UNLP-CONICET), Departamento
de Química, Facultad de Ciencias Exactas, Universidad Nacional de La Plata, 47 esq. 115, 1900 La Plata, República
Argentina
| | - Sonia E. Ulic
- CEQUINOR (UNLP-CONICET), Departamento
de Química, Facultad de Ciencias Exactas, Universidad Nacional de La Plata, 47 esq. 115, 1900 La Plata, República
Argentina
- Departamento
de Ciencias Básicas, Universidad Nacional de Luján, Rutas 5 y 7 (6700)
Luján, Argentina
| | - Rosana M. Romano
- CEQUINOR (UNLP-CONICET), Departamento
de Química, Facultad de Ciencias Exactas, Universidad Nacional de La Plata, 47 esq. 115, 1900 La Plata, República
Argentina
| | - Mauricio F. Erben
- CEQUINOR (UNLP-CONICET), Departamento
de Química, Facultad de Ciencias Exactas, Universidad Nacional de La Plata, 47 esq. 115, 1900 La Plata, República
Argentina
| | - Yury V. Vishnevskiy
- Universität Bielefeld, Lehrstuhl für Anorganische Chemie
und Strukturchemie, Universitätsstraße 25, 33615 Bielefeld,
Germany
| | - Christian G. Reuter
- Universität Bielefeld, Lehrstuhl für Anorganische Chemie
und Strukturchemie, Universitätsstraße 25, 33615 Bielefeld,
Germany
| | - Norbert W. Mitzel
- Universität Bielefeld, Lehrstuhl für Anorganische Chemie
und Strukturchemie, Universitätsstraße 25, 33615 Bielefeld,
Germany
| | - Helmut Beckers
- Fachbereich C -
Anorganische
Chemie, Bergische Universität Wuppertal, 42097 Wuppertal, Germany
| | - Helge Willner
- Fachbereich C -
Anorganische
Chemie, Bergische Universität Wuppertal, 42097 Wuppertal, Germany
| | - Xiaoqing Zeng
- Fachbereich C -
Anorganische
Chemie, Bergische Universität Wuppertal, 42097 Wuppertal, Germany
| | - Eduard Bernhardt
- Fachbereich C -
Anorganische
Chemie, Bergische Universität Wuppertal, 42097 Wuppertal, Germany
| | - Maofa Ge
- State Key Laboratory for Structural
Chemistry of Unstable and Stable Species, Beijing National Laboratory
for Molecular Sciences (BNLMS), Institute of Chemistry, Chinese Academy of Sciences, Beijing 100080, Peoples
Republic of China
| | - ShengRui Tong
- State Key Laboratory for Structural
Chemistry of Unstable and Stable Species, Beijing National Laboratory
for Molecular Sciences (BNLMS), Institute of Chemistry, Chinese Academy of Sciences, Beijing 100080, Peoples
Republic of China
| | - Carlos O. Della Védova.
- CEQUINOR (UNLP-CONICET), Departamento
de Química, Facultad de Ciencias Exactas, Universidad Nacional de La Plata, 47 esq. 115, 1900 La Plata, República
Argentina
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Cozzarín MV, Romano RM, Willner H, Della Védova CO. Matrix isolation of the elusive fluorocarbonylsulfenyl fluoride molecule FC(O)SF. J Phys Chem A 2013; 117:855-62. [PMID: 23267691 DOI: 10.1021/jp309310n] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
Abstract
The syn and anti conformers of the hitherto unknown fluorocarbonylsulphenyl fluoride FC(O)SF were formed through the photochemical reactions between OCS and F(2), isolated in solid Ar. The reactions were followed by Fourier transform infrared (FTIR) spectroscopy, and the unknown products were proposed by comparison of the observed IR absorptions with their computed IR spectra. The reactions occur through a 1:1 molecular complex between OCS and F(2), forming the anti-FC(O)SF first, which subsequently transforms into the syn form, through a randomization process. At longer times of irradiation, FC(O)SF decomposes by extrusion of a CO molecule with the concomitant formation of SF(2) and the formation of a difluorophosgene molecule, O═CF(2). The migration of fluorine atoms in the matrixes is proposed to explain the formation of SF(4) and SF(6).
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Affiliation(s)
- Melina V Cozzarín
- CEQUINOR (UNLP-CONICET), Departamento de Química, Facultad de Ciencias Exactas, Universidad Nacional de La Plata, 47 esq. 115, (1900) La Plata, Argentina
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45
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Ramos LA, Ulic SE, Romano RM, Vishnevskiy YV, Berger RJF, Mitzel NW, Beckers H, Willner H, Tong S, Ge M, Della Védova CO. Chlorodifluoroacetyl Isocyanate, ClF2CC(O)NCO: Preparation and Structural and Spectroscopic Studies. J Phys Chem A 2012; 116:11586-95. [DOI: 10.1021/jp3096055] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Affiliation(s)
- Luis A. Ramos
- CEQUINOR (UNLP-CONICET), Departamento
de Química, Facultad de Ciencias Exactas, Universidad Nacional de La Plata, 47 esq. 115, 1900 La Plata, República
Argentina
| | - Sonia E. Ulic
- CEQUINOR (UNLP-CONICET), Departamento
de Química, Facultad de Ciencias Exactas, Universidad Nacional de La Plata, 47 esq. 115, 1900 La Plata, República
Argentina
| | - Rosana M. Romano
- CEQUINOR (UNLP-CONICET), Departamento
de Química, Facultad de Ciencias Exactas, Universidad Nacional de La Plata, 47 esq. 115, 1900 La Plata, República
Argentina
| | - Yury V. Vishnevskiy
- Lehrstuhl für
Anorganische
Chemie und Strukturchemie, Universität Bielefeld, Universitätsstraße 25, 33615 Bielefeld, Germany
| | - Raphael J. F. Berger
- Lehrstuhl für
Anorganische
Chemie und Strukturchemie, Universität Bielefeld, Universitätsstraße 25, 33615 Bielefeld, Germany
| | - Norbert W. Mitzel
- Lehrstuhl für
Anorganische
Chemie und Strukturchemie, Universität Bielefeld, Universitätsstraße 25, 33615 Bielefeld, Germany
| | - Helmut Beckers
- Fachbereich C - Anorganische Chemie, Bergische Universität Wuppertal, 42097 Wuppertal,
Germany
| | - Helge Willner
- Fachbereich C - Anorganische Chemie, Bergische Universität Wuppertal, 42097 Wuppertal,
Germany
| | - Shengrui Tong
- State Key Laboratory
for Structural
Chemistry of Unstable and Stable Species, Institute of Chemistry, Chinese Academy of Sciences, Beijing 100190, China
| | - Maofa Ge
- State Key Laboratory
for Structural
Chemistry of Unstable and Stable Species, Institute of Chemistry, Chinese Academy of Sciences, Beijing 100190, China
| | - Carlos O. Della Védova
- CEQUINOR (UNLP-CONICET), Departamento
de Química, Facultad de Ciencias Exactas, Universidad Nacional de La Plata, 47 esq. 115, 1900 La Plata, República
Argentina
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46
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Geronés M, Erben MF, Romano RM, Cavasso Filho RL, Della Védova CO. Dissociative Photoionization of Methyl Thiochloroformate, ClC(O)SCH3, Following Sulfur 2p, Chlorine 2p, Carbon 1s, and Oxygen 1s Excitations. J Phys Chem A 2012; 116:7498-507. [DOI: 10.1021/jp302164t] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Mariana Geronés
- CEQUINOR (CONICET-UNLP), Departamento
de Química, Facultad de Ciencias Exactas, Universidad Nacional de La Plata, C. C. 962 (1900) La Plata, República
Argentina
| | - Mauricio F. Erben
- CEQUINOR (CONICET-UNLP), Departamento
de Química, Facultad de Ciencias Exactas, Universidad Nacional de La Plata, C. C. 962 (1900) La Plata, República
Argentina
| | - Rosana M. Romano
- CEQUINOR (CONICET-UNLP), Departamento
de Química, Facultad de Ciencias Exactas, Universidad Nacional de La Plata, C. C. 962 (1900) La Plata, República
Argentina
| | | | - Carlos O. Della Védova
- CEQUINOR (CONICET-UNLP), Departamento
de Química, Facultad de Ciencias Exactas, Universidad Nacional de La Plata, C. C. 962 (1900) La Plata, República
Argentina
- Laboratorio de Servicios a la Industria y al Sistema Científico, LaSeISiC, (UNLP−CIC−CONICET) Camino Centenario e/505 y 508,
(1903) Gonnet, República Argentina
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47
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Geronés M, Erben MF, Romano RM, Cavasso Filho RL, Della Védova CO. Interstellar H3+ and HCS+ Ions Produced in the Dissociative Photoionization Process of CH3C(O)SCH3 in the Proximity of the Sulfur 2p, Carbon 1s, and Oxygen 1s Edges. J Phys Chem A 2012; 116:2571-82. [DOI: 10.1021/jp212238c] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/05/2023]
Affiliation(s)
- Mariana Geronés
- CEQUINOR (CONICET-UNLP), Departamento
de Química, Facultad de Ciencias Exactas, Universidad Nacional de La Plata, C. C. 962 (1900) La Plata, República
Argentina
| | - Mauricio F. Erben
- CEQUINOR (CONICET-UNLP), Departamento
de Química, Facultad de Ciencias Exactas, Universidad Nacional de La Plata, C. C. 962 (1900) La Plata, República
Argentina
| | - Rosana M. Romano
- CEQUINOR (CONICET-UNLP), Departamento
de Química, Facultad de Ciencias Exactas, Universidad Nacional de La Plata, C. C. 962 (1900) La Plata, República
Argentina
| | | | - Carlos O. Della Védova
- CEQUINOR (CONICET-UNLP), Departamento
de Química, Facultad de Ciencias Exactas, Universidad Nacional de La Plata, C. C. 962 (1900) La Plata, República
Argentina
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Gómez Castaño JA, Romano RM, Beckers H, Willner H, Della Védova CO. Preparation and Properties of Two Novel Selenoacetic Acids: HCF2C(O)SeH and ClCF2C(O)SeH. Inorg Chem 2012; 51:2608-15. [DOI: 10.1021/ic202572n] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Jovanny A. Gómez Castaño
- CEQUINOR (UNLP-CONICET), Departamento
de Química, Facultad de Ciencias Exactas, Universidad Nacional de La Plata, 47 esq. 115, (1900) La Plata,
Argentina
| | - Rosana M. Romano
- CEQUINOR (UNLP-CONICET), Departamento
de Química, Facultad de Ciencias Exactas, Universidad Nacional de La Plata, 47 esq. 115, (1900) La Plata,
Argentina
| | - Helmut Beckers
- Anorganische
Chemie, Bergische Universität Wuppertal, Gaussstrasse
20, D-42097 Wuppertal, Germany
| | - Helge Willner
- Anorganische
Chemie, Bergische Universität Wuppertal, Gaussstrasse
20, D-42097 Wuppertal, Germany
| | - Carlos O. Della Védova
- CEQUINOR (UNLP-CONICET), Departamento
de Química, Facultad de Ciencias Exactas, Universidad Nacional de La Plata, 47 esq. 115, (1900) La Plata,
Argentina
- Laboratorio de Servicios a la
Industria y al Sistema Científico (UNLP-CIC-CONICET), Departamento
de Química, Facultad de Ciencias Exactas, Universidad Nacional de La Plata, Camino Centenario e/505 y 508,
(1897) Gonnet, Argentina
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Rodríguez Pirani LS, Geronés M, Della Védova CO, Romano RM, Fantoni A, Cavasso-Filho R, Ma C, Ge M, Erben MF. Electronic properties and dissociative photoionization of thiocyanates. Part II. Valence and shallow-core (sulfur and chlorine 2p) regions of chloromethyl thiocyanate, CH2ClSCN. J Phys Chem A 2011; 116:231-41. [PMID: 22098365 DOI: 10.1021/jp208232t] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/28/2023]
Abstract
A combination of photoelectron spectroscopy and synchrotron based photoelectron photoion coincidence (PEPICO) spectra has been applied to investigate the electronic structure and the dissociative ionization of the CH(2)ClSCN molecule in the valence region. The PES is assigned with the electronic structure calculations at the outer-valence Green's function and symmetry adapted cluster/configuration interaction (SAC-CI) levels offer an explanation of our experimental results. Upon vacuum ultraviolet irradiation the low-lying radical cation, located at 10.39 eV is formed. The molecular ion is observed in the time-of-flight mass spectra, together with the CH(2)SCN(+) and CH(2)Cl(+) daughter ions. The total ion yield spectra have been measured in the S 2p and Cl 2p regions and several channels have been determined in dissociative photoionization events for the core-excited species. Thus, by using time-of-flight mass spectrometry and synchrotron radiation the relative abundances of the ionic fragments and their kinetic energy release values were obtained from both PEPICO and photoelectron photoion photoion coincidence spectra. Possible fragmentation processes are discussed and compared with that found for the related CH(3)SCN species.
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Affiliation(s)
- Lucas S Rodríguez Pirani
- CEQUINOR (UNLP-CONICET, CCT La Plata), Departamento de Química, Facultad de Ciencias Exactas, Universidad Nacional de La Plata, CC 962, La Plata (CP 1900), República Argentina
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Tobón YA, Cozzarín MV, Wang WG, Ge MF, Della Védova CO, Romano RM. Vibrational and Valence Photoelectron Spectroscopies, Matrix Photochemistry, and Conformational Studies of ClC(O)SSCl. J Phys Chem A 2011; 115:10203-10. [DOI: 10.1021/jp204789h] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022]
Affiliation(s)
- Yeny A. Tobón
- CEQUINOR (UNLP-CONICET, CCT-La Plata), Departamento de Química, Facultad de Ciencias Exactas, Universidad Nacional de La Plata, C.C. 962, 1900 La Plata, Argentina
| | - Melina V. Cozzarín
- CEQUINOR (UNLP-CONICET, CCT-La Plata), Departamento de Química, Facultad de Ciencias Exactas, Universidad Nacional de La Plata, C.C. 962, 1900 La Plata, Argentina
| | - Wei-Gang Wang
- Beijing National Laboratory for Molecular Sciences (BNLMS), State Key Laboratory for Structural Chemistry of Unstable and Stable Species, Institute of Chemistry, Chinese Academy of Sciences, 100190, Beijing, P. R. China
| | - Mao-Fa Ge
- Beijing National Laboratory for Molecular Sciences (BNLMS), State Key Laboratory for Structural Chemistry of Unstable and Stable Species, Institute of Chemistry, Chinese Academy of Sciences, 100190, Beijing, P. R. China
| | - Carlos O. Della Védova
- CEQUINOR (UNLP-CONICET, CCT-La Plata), Departamento de Química, Facultad de Ciencias Exactas, Universidad Nacional de La Plata, C.C. 962, 1900 La Plata, Argentina
- LaSeISiC (CIC-UNLP-CONICET), Departamento de Química, Facultad de Ciencias Exactas, Universidad Nacional de La Plata, Camino Centenario y 508, 1897 Gonnet, Argentina
| | - Rosana M. Romano
- CEQUINOR (UNLP-CONICET, CCT-La Plata), Departamento de Química, Facultad de Ciencias Exactas, Universidad Nacional de La Plata, C.C. 962, 1900 La Plata, Argentina
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