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Espitia Cogollo E, Echeverría GA, Piro OE, Jios JL, Ulic SE. Perhalomethyl Chromones: Spectroscopic, X‐Ray Diffraction, Hirshfeld Surface, and Density Functional Theory Studies of the Noncovalent Interactions. Crystal Research and Technology 2022. [DOI: 10.1002/crat.202200085] [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] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Affiliation(s)
- Edeimis Espitia Cogollo
- CEQUINOR (CONICET‐UNLP) Facultad de Ciencias Exactas Universidad Nacional de La Plata Bv. 120 N° 1465 La Plata 1900 Argentina
| | - Gustavo A. Echeverría
- Departamento de Física Facultad de Ciencias Exactas Universidad Nacional de La Plata e IFLP (CONICET, CCT‐La Plata) C. C. 67 La Plata 1900 Argentina
| | - Oscar E. Piro
- Departamento de Física Facultad de Ciencias Exactas Universidad Nacional de La Plata e IFLP (CONICET, CCT‐La Plata) C. C. 67 La Plata 1900 Argentina
| | - Jorge L. Jios
- Laboratorio UPL (UNLP‐CIC) Campus Tecnológico Gonnet (CIC‐BA) Cno. Centenario e/505 y 508 Gonnet (1897) Argentina
- Departamento de Química Facultad de Ciencias Exactas Universidad Nacional de La Plata 47 esq. 115 La Plata (1900) Argentina
| | - Sonia E. Ulic
- CEQUINOR (CONICET‐UNLP) Facultad de Ciencias Exactas Universidad Nacional de La Plata Bv. 120 N° 1465 La Plata 1900 Argentina
- Departamento de Ciencias Básicas Universidad Nacional de Luján Rutas 5 y 7 Luján Buenos Aires 6700 Argentina
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Narváez-Ordoñez EG, Pabón-Carcelén KA, Zurita-Saltos DA, Bonilla-Valladares PM, Yánez-Darquea TG, Ramos-Guerrero LA, Ulic SE, Jios JL, Echeverría GA, Piro OE, Langer P, Alcívar-León CD, Heredia-Moya J. Synthesis, Experimental and Theoretical Study of Azidochromones. Molecules 2022; 27:molecules27092636. [PMID: 35565987 PMCID: PMC9105743 DOI: 10.3390/molecules27092636] [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] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 01/31/2022] [Revised: 02/10/2022] [Accepted: 02/16/2022] [Indexed: 11/16/2022]
Abstract
A series of 2-(haloalkyl)-3-azidomethyl and 6-azido chromones has been synthetized, characterized and studied by theoretical (DFT calculations) and spectroscopic methods (UV-Vis, NMR). The crystal structure of 3-azidomethyl-2-difluoromethyl chromone, determined by X-ray diffraction methods, shows a planar framework due to extended π-bond delocalization. Its molecular packing is stabilized by F···H, N···H and O···H hydrogen bonds, π···π stacking and C–O···π intermolecular interactions. Moreover, AIM, NCI and Hirshfeld analysis evidenced that azido moiety has a significant role in the stabilization of crystal packing through weak intermolecular interactions, where analysis of electronic density suggested closed-shell (CS) interatomic interactions.
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Affiliation(s)
- Ena G. Narváez-Ordoñez
- Facultad de Ciencias Químicas, Universidad Central del Ecuador, Francisco Viteri s/n y Gilberto Gato Sobral, Quito 170521, Ecuador; (E.G.N.-O.); (K.A.P.-C.); (D.A.Z.-S.); (P.M.B.-V.); (T.G.Y.-D.)
| | - Kevin A. Pabón-Carcelén
- Facultad de Ciencias Químicas, Universidad Central del Ecuador, Francisco Viteri s/n y Gilberto Gato Sobral, Quito 170521, Ecuador; (E.G.N.-O.); (K.A.P.-C.); (D.A.Z.-S.); (P.M.B.-V.); (T.G.Y.-D.)
| | - Daniel A. Zurita-Saltos
- Facultad de Ciencias Químicas, Universidad Central del Ecuador, Francisco Viteri s/n y Gilberto Gato Sobral, Quito 170521, Ecuador; (E.G.N.-O.); (K.A.P.-C.); (D.A.Z.-S.); (P.M.B.-V.); (T.G.Y.-D.)
| | - Pablo M. Bonilla-Valladares
- Facultad de Ciencias Químicas, Universidad Central del Ecuador, Francisco Viteri s/n y Gilberto Gato Sobral, Quito 170521, Ecuador; (E.G.N.-O.); (K.A.P.-C.); (D.A.Z.-S.); (P.M.B.-V.); (T.G.Y.-D.)
| | - Trosky G. Yánez-Darquea
- Facultad de Ciencias Químicas, Universidad Central del Ecuador, Francisco Viteri s/n y Gilberto Gato Sobral, Quito 170521, Ecuador; (E.G.N.-O.); (K.A.P.-C.); (D.A.Z.-S.); (P.M.B.-V.); (T.G.Y.-D.)
| | | | - Sonia E. Ulic
- CEQUINOR (CONICET-UNLP), Facultad de Ciencias Exactas, Universidad Nacional de La Plata, Bv. 120 No 1465, La Plata 1900, Buenos Aires, Argentina;
- Departamento de Ciencias Básicas, Facultad de Ciencias Exactas, Universidad Nacional de Luján, Rutas 5 y 7, Luján 6700, Buenos Aires, Argentina
| | - Jorge L. Jios
- Laboratorio UPL (UNLP-CIC), Camino Centenario e/505 y 508 (1897) M.B. Gonnet and Departamento de Química, Facultad de Ciencias Exactas, Universidad Nacional de La Plata, República Argentina. 47 esq. 115, La Plata 1900, Buenos Aires, Argentina;
| | - Gustavo A. Echeverría
- Departamento de Física, Facultad de Ciencias Exactas, Universidad Nacional de La Plata e IFLP (CONICET, CCT-La Plata), La Plata 1900, Buenos Aires, Argentina; (G.A.E.); (O.E.P.)
| | - Oscar E. Piro
- Departamento de Física, Facultad de Ciencias Exactas, Universidad Nacional de La Plata e IFLP (CONICET, CCT-La Plata), La Plata 1900, Buenos Aires, Argentina; (G.A.E.); (O.E.P.)
| | - Peter Langer
- Institut für Chemie, Universität Rostock, Albert-Einstein-Str. 3a, 18059 Rostock, Germany;
- Leibniz Institut für Katalyse, Universität Rostock e. V. (LIKAT), Albert-Einstein-Str. 29a, 18059 Rostock, Germany
| | - Christian D. Alcívar-León
- Facultad de Ciencias Químicas, Universidad Central del Ecuador, Francisco Viteri s/n y Gilberto Gato Sobral, Quito 170521, Ecuador; (E.G.N.-O.); (K.A.P.-C.); (D.A.Z.-S.); (P.M.B.-V.); (T.G.Y.-D.)
- Correspondence: (C.D.A.-L.); (J.H.-M.)
| | - Jorge Heredia-Moya
- Centro de Investigación Biomédica (CENBIO), Facultad de Ciencias de la Salud Eugenio Espejo, Universidad UTE, Quito 170527, Ecuador
- Correspondence: (C.D.A.-L.); (J.H.-M.)
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Narváez O EG, Bonilla V. PM, Zurita DA, Alcívar L. CD, Heredia-Moya J, Ulic SE, Jios JL, Piro OE, Echeverría GA, Langer P. Synthesis, experimental and theoretical study of novel 2-haloalkyl (-CF2H, -CCl2H, -CF2CF3)-, 3-bromo and bromomethyl substituted chromones. J Fluor Chem 2021. [DOI: 10.1016/j.jfluchem.2020.109717] [Citation(s) in RCA: 1] [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: 01/17/2023]
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Rocha M, Echeverría GA, Piro OE, Jios JL, Ulic SE, Gil DM. Role of fluorine-fluorine and weak intermolecular interactions in the supramolecular network of a new trifluoromethyl-1,5-benzodiazepine: Crystal structure, Hirshfeld surface analysis and theoretical study. J Fluor Chem 2021. [DOI: 10.1016/j.jfluchem.2020.109697] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
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Rocha M, Echeverría GA, Piro OE, Jios JJ, Molina RDI, Arena ME, Ulic SE, Gil DM. Synthesis, Structure, and Biological Assays of Novel Trifluoromethyldiazepine–Metal Complexes. Aust J Chem 2020. [DOI: 10.1071/ch19352] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
Abstract
A new series of CuII, NiII, CoII, and MnIII complexes have been synthesised from the (6Z)-6-(7-trifluoromethyl-1,2,3,4-tetrahydro-5H-1,4-diazepin-5-ylidene)cyclohexa-2,4-dien-1-one (HDZP) ligand. These complexes were characterised by elemental, spectroscopic (IR and UV-vis), and thermal analysis. The crystal structure of Cu-DZP was solved by X-ray diffraction methods. The complex crystallises in the monoclinic P21/c space group, with two molecules per unit cell. The crystal lattice is stabilised by different intra and intermolecular interactions. Hirshfeld surface analysis was employed to obtain additional information about interactions that are responsible for the crystal packing. Quantitative examination of the fingerprint plots indicated the dominant contribution of H⋯H and H⋯X (X=O, F) interactions in the crystal packing. In addition, C–H⋯chelate ring (CR) and C–H⋯π interactions are described in detail and evaluated using DFT calculations. The antibacterial properties and the mechanism of inhibition of the main bacterial resistant mechanism, the biofilm, of the metal complexes and free ligand were investigated. [Mn(DZP)3]·2H2O was the most active complex against the Pseudomonas aeruginosa biofilm formation with an inhibition of 40%. However, none of the complexes inhibit more than 25% of the Gram negative bacteria microbial development. The most meaningful result was the bactericidal effect of [Co(DZP)2(H2O)2]·2H2O against the Gram positive bacteria, Staphylococcus aureus, which inhibits the bacterial development and significantly reduces the biofilm formation at low concentration.
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Rocha M, Gil DM, Echeverría GA, Piro OE, Jios JL, Ulic SE. Enol-imino-Keto-enamine Tautomerism in a Diazepine Derivative: How Decisive Are the Intermolecular Interactions in the Equilibrium? J Org Chem 2019; 84:11042-11053. [PMID: 31419129 DOI: 10.1021/acs.joc.9b01533] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
The strange tautomeric equilibrium behavior exhibited by a new o-hydroxyphenyl diazepine derivative when the compound is analyzed both in solution and solid state opens the structural study of the enol-imino-keto-enamine forms and the influence of the intermolecular interactions in their equilibrium. The expected enol-imino form, in which the enol is part of a phenyl system and a strong O-H···N intramolecular hydrogen bond is established, results the most stable tautomer in gas phase (theoretical calculations) and was detected by NMR spectroscopy when the compound was dissolved in aprotic solvents. Nevertheless, the keto-enamine form ,in which the keto group integrates a cyclohexadienone moiety and the aromaticity of the phenol is lost, was the only tautomer in the crystal lattice according to single-crystal X-ray diffraction, vibrational spectroscopy, and diffuse reflectance results. The last form was also found as the main tautomer in UV-vis and NMR spectroscopy when a protic solvent was employed.
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Affiliation(s)
- Mariana Rocha
- INQUINOA (CONICET - UNT). Instituto de Química Física, Facultad de Bioquímica, Química y Farmacia , Universidad Nacional de Tucumán , San Lorenzo 456 , T4000CAN San Miguel de Tucumán , Argentina
| | - Diego M Gil
- INQUINOA (CONICET - UNT). Instituto de Química Física, Facultad de Bioquímica, Química y Farmacia , Universidad Nacional de Tucumán , San Lorenzo 456 , T4000CAN San Miguel de Tucumán , Argentina
| | - Gustavo A Echeverría
- Departamento de Física, Facultad de Ciencias Exactas , Universidad Nacional de La Plata e IFLP (CONICET, CCT-La Plata) , C.C. 67 , 1900 La Plata , Argentina
| | - Oscar E Piro
- Departamento de Física, Facultad de Ciencias Exactas , Universidad Nacional de La Plata e IFLP (CONICET, CCT-La Plata) , C.C. 67 , 1900 La Plata , Argentina
| | - Jorge L Jios
- Unidad PLAPIMU-LASEISIC (UNLP-CIC), Departamento de Química, Facultad de Ciencias Exactas , Universidad Nacional de La Plata , 47 esq 115 , 1900 La Plata , Argentina
| | - Sonia E Ulic
- CEQUINOR (CONICET-UNLP), Facultad de Ciencias Exactas , Universidad Nacional de La Plata , Bv 120 No. 1465 , 1900 La Plata , Argentina.,Departamento de Ciencias Básicas , Universidad Nacional de Luján , Rutas 5 y 7 , 6700 Luján , Buenos Aires , Argentina
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Alcívar León CD, Echeverría GA, Piro OE, Ulic SE, Jios JL. A detailed experimental and theoretical study of two novel substituted trifluoromethylchromones. The influence of the bulky bromine atom on the crystal packing. Spectrochim Acta A Mol Biomol Spectrosc 2015; 136 Pt C:1358-1370. [PMID: 25459694 DOI: 10.1016/j.saa.2014.10.022] [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] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/07/2014] [Revised: 09/11/2014] [Accepted: 10/11/2014] [Indexed: 06/04/2023]
Abstract
The new 3-methyl-2-trifluoromethylchromone (1) and 3-bromomethyl-2-trifluoromethylchromone (2) compounds were synthesized and characterized by vibrational (IR, Raman), UV-Vis and NMR ((1)H, (13)C and (19)F) spectroscopy and MS spectrometry. The crystal structures of 1 and 2 were determined by X-ray diffraction methods. Both compounds crystallize in the monoclinic P21/c space group with Z=4 molecules per unit cell. The structures were solved from 1423 (1) and 1856 (2) reflections with I>2σ (I) and refined by full-matrix least-squares to agreement R1-values of 0.0403 (1) and 0.0554 (2). Because of π-bonding delocalization, the organic molecular skeletons are planar and the molecular bonding structures can be described by formally single, double and resonant bonds. In 2, the CF3 group revealed a strong rotational disorder around the CCF3 bond, which could be explained in terms of four split positions with about uniform angular distribution. The vibrational, electronic and NMR, spectra were discussed and assigned with the assistance of DFT calculations.
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Affiliation(s)
- C D Alcívar León
- CEQUINOR (CONICET-UNLP), Facultad de Ciencias Exactas, Universidad Nacional de La Plata, 47 esq. 115, 1900 La Plata, Argentina
| | - G A Echeverría
- Departamento de Física, Facultad de Ciencias Exactas, Universidad Nacional de La Plata e IFLP (CONICET, CCT-La Plata), C.C. 67, 1900 La Plata, Argentina
| | - O E Piro
- Departamento de Física, Facultad de Ciencias Exactas, Universidad Nacional de La Plata e IFLP (CONICET, CCT-La Plata), C.C. 67, 1900 La Plata, Argentina
| | - S E Ulic
- CEQUINOR (CONICET-UNLP), Facultad de Ciencias Exactas, Universidad Nacional de La Plata, 47 esq. 115, 1900 La Plata, Argentina; Departamento de Ciencias Básicas, Universidad Nacional de Luján, Rutas 5 y 7, 6700 Luján, Buenos Aires, Argentina.
| | - J L Jios
- LASEISIC-PLAPIMU (UNLP-CIC), Departamento de Química, Facultad de Ciencias Exactas, Universidad Nacional de La Plata, 47 esq. 115, 1900 La Plata, 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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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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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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13
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Defonsi Lestard ME, Ramos LA, Tuttolomondo ME, Ulic SE, Ben Altabef A. Bis (trifluoromethyl) sulfone, CF3SO2CF3: synthesis, vibrational and conformational properties. Spectrochim Acta A Mol Biomol Spectrosc 2012; 96:332-339. [PMID: 22706098 DOI: 10.1016/j.saa.2012.05.049] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/24/2012] [Revised: 05/07/2012] [Accepted: 05/17/2012] [Indexed: 06/01/2023]
Abstract
Bis (trifluoromethyl) sulfone, CF(3)SO(2)CF(3), was obtained as a byproduct in the synthesis of CF(3)SO(2)SCF(3). The compound was characterized by infrared and Raman spectroscopy as well quantum chemical calculations. Quantum mechanical calculations indicate the possible existence of two conformers symmetrically equivalent with C(2) symmetry. The preference for the staggered form was studied using the total energy scheme and the natural bond orbital (NBO) partition scheme. Additionally, the total potential energy was deconvoluted using a sixfold decomposition in terms of a Fourier-type expansion, showing that the hyperconjugative effect was dominant in stabilizing the staggered conformer. Infrared and Raman spectra of CF(3)SO(2)CF(3) were obtained. Harmonic vibrational wavenumbers and a scaled force field were calculated, leading to a final root mean-square deviation of 7.8 cm(-1) when comparing experimental and calculated wavenumbers.
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Affiliation(s)
- M E Defonsi Lestard
- INQUINOA-CONICET, Instituto de Química Física, Facultad de Bioquímica, Química y Farmacia, Universidad Nacional de Tucumán, San Lorenzo 456, T4000CAN Tucumán, Argentina
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14
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Ramos LA, Zeng X, Ulic SE, Beckers H, Willner H, Della Védova CO. Chlorodifluoroacetyl Azide, ClF2CC(O)N3: Preparation, Properties, and Decomposition. J Org Chem 2012; 77:6456-62. [DOI: 10.1021/jo3009726] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
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, Argentina
| | - Xiaoqing Zeng
- Fachbereich
C - Anorganische Chemie, Bergische Universität Wuppertal, 42097 Wuppertal,
Germany
| | - Sonia E. Ulic
- CEQUINOR (UNLP-CONICET), Departamento
de Química, Facultad de Ciencias Exactas, Universidad Nacional de La Plata, 47 esq. 115, 1900 La Plata, Argentina
- Departamento de Ciencias Básicas, Universidad Nacional de Luján, Rutas 5 y 7 (6700),
Luján, 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, Argentina
- Laboratorio de Servicios a la Industria y al Sistema Científico (UNLP-CIC-CONICET), Buenos Aires, Argentina
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15
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Hidalgo A, Jiménez LPA, Ramos LA, Mroginski MA, Jios JL, Ulic SE, Echeverría GA, Piro OE, Castellano E. Spectroscopic, structural, and conformational properties of (Z)-4,4,4-trifluoro-3-(2-hydroxyethylamino)-1-(2-hydroxyphenyl)-2-buten-1-one, C12H12F3NO3: a trifluoromethyl-substituted β-aminoenone. J Phys Chem A 2012; 116:1110-8. [PMID: 22242788 DOI: 10.1021/jp211536q] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
The (Z)-4,4,4-trifluoro-3-(2-hydroxyethylamino)-1-(2-hydroxyphenyl)-2-buten-1-one (C(12)H(12)F(3)NO(3)) compound was thoroughly studied by IR, Raman, UV-visible, and (13)C and (19)F NMR spectroscopies. The solid-state molecular structure was determined by X-ray diffraction methods. It crystallizes in the P2(1)/c space group with a = 12.1420(4) Å, b = 7.8210(3) Å, c = 13.8970(5) Å, β = 116.162(2)°, and Z = 4 molecules per unit cell. The molecule shows a nearly planar molecular skeleton, favored by intramolecular OH···O and NH···O bonds, which are arranged in the lattice as an OH···O bonded polymer coiled around crystallographic 2-fold screw-axes. The three postulated tautomers were evaluated using quantum chemical calculations. The lowest energy tautomer (I) calculated with density functional theory methods agrees with the observed crystal structure. The structural and conformational properties are discussed considering the effect of the intra- and intermolecular hydrogen bond interactions.
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Affiliation(s)
- A Hidalgo
- CEQUINOR (CONICET-UNLP), Facultad de Ciencias Exactas, Universidad Nacional de La Plata, La Plata, República Argentina
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Ramos LA, Ulic SE, Romano RM, Tong S, Ge M, Vishnevskiy YV, Berger RJ, Mitzel NW, Beckers H, Willner H, Della Védova CO. Chlorodifluoroacetyl Cyanide, ClF2CC(O)CN: Synthesis, Structure, and Spectroscopic Characterization. Inorg Chem 2011; 50:9650-9. [DOI: 10.1021/ic201390h] [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: 01/11/2023]
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
| | - 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
| | - Yuri V. Vishnevskiy
- Universität Bielefeld, Lehrstuhl für Anorganische Chemie und Strukturchemie, Universitätsstraße 25, 33615 Bielefeld, Germany
| | - Raphael J. Berger
- 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
| | - 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
- Laboratorio de Servicios a la Industria y al Sistema Científico (UNLP−CIC−CONICET), Buenos Aires, República Argentina
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Martínez Córdoba GA, Ramos LA, Ulic SE, Jios JL, DellaVédova CO, Pepino J, Burgos Paci MA, Argüello GA, Ge M, Beckers H, Willner H. 2-Chloroethylisocyanate. Thermal decomposition and spectroscopic properties. J Phys Chem A 2011; 115:8608-15. [PMID: 21718037 DOI: 10.1021/jp2036197] [Citation(s) in RCA: 4] [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: 11/28/2022]
Abstract
2-Chloroethylisocyanate has been studied in a thorough way. NMR, Raman, FTIR, and Ar-matrix vibrational spectra of the molecule are presented and discussed with the complement of ab initio and DFT methods. The spectroscopic results reveal the existence of anti and gauche conformers that are equally populated in the gas phase. Thermal decomposition between 393 and 648 K shows two different pathways depending on the temperature, which can be interpreted in terms of simple second- and first-order mechanisms, respectively. Quantum mechanical calculations reproduce the experimental results.
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Affiliation(s)
- Gustavo A Martínez Córdoba
- LaSeISiC (UNLP-CIC-CONICET), Departamento de Química, Facultad de Ciencias Exactas, Universidad Nacional de La Plata, República Argentina
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18
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Ramos LA, Ulic SE, Romano RM, Erben MF, Lehmann CW, Bernhardt E, Beckers H, Willner H, Della Védova CO. Vibrational Spectra, Crystal Structures, Constitutional and Rotational Isomerism of FC(O)SCN and FC(O)NCS. Inorg Chem 2010; 49:11142-57. [DOI: 10.1021/ic101741e] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
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
- 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
| | | | - Eduard Bernhardt
- Fachbereich C, Anorganische Chemie, Bergische Universität Wuppertal, 42097 Wuppertal, 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
| | - 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
- Laboratorio de Servicios a la Industria y al Sistema Científico (UNLP-CIC-CONICET), Buenos Aires, República Argentina
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Cuaquira Reina M, Della Védova CO, Ulic SE, Willner H, Oberhammer H. Spectroscopic Characterization and Conformational Properties of
S
‐(Fluoroformyl)‐
O
‐(acetyl) Thioperoxide and
S
‐(Fluoroformyl)‐
O
‐(trifluoroacetyl) Thioperoxide. Eur J Inorg Chem 2009. [DOI: 10.1002/ejic.200900128] [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: 11/09/2022]
Affiliation(s)
- Marlene Cuaquira Reina
- CEQUINOR Facultad de Ciencias Exactas, UniversidadNacional de La Plata, 47 esq. 115, (1900) La Plata, Buenos Aires, República Argentina
| | - Carlos O. Della Védova
- CEQUINOR Facultad de Ciencias Exactas, UniversidadNacional de La Plata, 47 esq. 115, (1900) La Plata, Buenos Aires, República 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, Gonnet, Buenos Aires, República Argentina
| | - Sonia E. Ulic
- CEQUINOR Facultad de Ciencias Exactas, UniversidadNacional de La Plata, 47 esq. 115, (1900) La Plata, Buenos Aires, República Argentina
- Departamento de Ciencias Básicas, Universidad Nacional de Luján, Rutas 5 y 7 (6700) Luján, Buenos Aires, República Argentina
| | - Helge Willner
- Bergische Universität Wuppertal, Gaußstraße 20, 42119 Wuppertal, Germany
| | - Heinz Oberhammer
- Institut für Physikalische und Theoretische Chemie, Universität Tübingen, Auf der Morgenstelle 8, 72076 Tübingen, Germany
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21
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Reina MC, Boese R, Ge M, Ulic SE, Beckers H, Willner H, Della Védova CO. Synthesis, Spectroscopic Characterization, and Conformational Properties of Trichloromethanesulfenyl Acetate, CCl3SOC(O)CH3. J Phys Chem A 2008; 112:7939-46. [DOI: 10.1021/jp803609m] [Citation(s) in RCA: 9] [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: 01/15/2023]
Affiliation(s)
- Marlene Cuaquira Reina
- CEQUINOR (CONICET-UNLP), Facultad de Ciencias Exactas, Universidad Nacional de La Plata, 47 esq. 115, (1900) La Plata, Buenos Aires, República Argentina, Departamento de Ciencias Básicas, Universidad Nacional de Luján, Rutas 5 y 7 (6700) Luján, Buenos Aires, República Argentina, Laboratorio de Servicios a la Industria y al Sistema Científico (UNLP-CIC-CONICET), Camino Centenario, Gonnet, Buenos Aires, República Argentina, Institute of Chemistry, Chinese Academy of Sciences, Beijing 100080, People’s
| | - Roland Boese
- CEQUINOR (CONICET-UNLP), Facultad de Ciencias Exactas, Universidad Nacional de La Plata, 47 esq. 115, (1900) La Plata, Buenos Aires, República Argentina, Departamento de Ciencias Básicas, Universidad Nacional de Luján, Rutas 5 y 7 (6700) Luján, Buenos Aires, República Argentina, Laboratorio de Servicios a la Industria y al Sistema Científico (UNLP-CIC-CONICET), Camino Centenario, Gonnet, Buenos Aires, República Argentina, Institute of Chemistry, Chinese Academy of Sciences, Beijing 100080, People’s
| | - Maofa Ge
- CEQUINOR (CONICET-UNLP), Facultad de Ciencias Exactas, Universidad Nacional de La Plata, 47 esq. 115, (1900) La Plata, Buenos Aires, República Argentina, Departamento de Ciencias Básicas, Universidad Nacional de Luján, Rutas 5 y 7 (6700) Luján, Buenos Aires, República Argentina, Laboratorio de Servicios a la Industria y al Sistema Científico (UNLP-CIC-CONICET), Camino Centenario, Gonnet, Buenos Aires, República Argentina, Institute of Chemistry, Chinese Academy of Sciences, Beijing 100080, People’s
| | - Sonia E. Ulic
- CEQUINOR (CONICET-UNLP), Facultad de Ciencias Exactas, Universidad Nacional de La Plata, 47 esq. 115, (1900) La Plata, Buenos Aires, República Argentina, Departamento de Ciencias Básicas, Universidad Nacional de Luján, Rutas 5 y 7 (6700) Luján, Buenos Aires, República Argentina, Laboratorio de Servicios a la Industria y al Sistema Científico (UNLP-CIC-CONICET), Camino Centenario, Gonnet, Buenos Aires, República Argentina, Institute of Chemistry, Chinese Academy of Sciences, Beijing 100080, People’s
| | - Helmut Beckers
- CEQUINOR (CONICET-UNLP), Facultad de Ciencias Exactas, Universidad Nacional de La Plata, 47 esq. 115, (1900) La Plata, Buenos Aires, República Argentina, Departamento de Ciencias Básicas, Universidad Nacional de Luján, Rutas 5 y 7 (6700) Luján, Buenos Aires, República Argentina, Laboratorio de Servicios a la Industria y al Sistema Científico (UNLP-CIC-CONICET), Camino Centenario, Gonnet, Buenos Aires, República Argentina, Institute of Chemistry, Chinese Academy of Sciences, Beijing 100080, People’s
| | - Helge Willner
- CEQUINOR (CONICET-UNLP), Facultad de Ciencias Exactas, Universidad Nacional de La Plata, 47 esq. 115, (1900) La Plata, Buenos Aires, República Argentina, Departamento de Ciencias Básicas, Universidad Nacional de Luján, Rutas 5 y 7 (6700) Luján, Buenos Aires, República Argentina, Laboratorio de Servicios a la Industria y al Sistema Científico (UNLP-CIC-CONICET), Camino Centenario, Gonnet, Buenos Aires, República Argentina, Institute of Chemistry, Chinese Academy of Sciences, Beijing 100080, People’s
| | - Carlos O. Della Védova
- CEQUINOR (CONICET-UNLP), Facultad de Ciencias Exactas, Universidad Nacional de La Plata, 47 esq. 115, (1900) La Plata, Buenos Aires, República Argentina, Departamento de Ciencias Básicas, Universidad Nacional de Luján, Rutas 5 y 7 (6700) Luján, Buenos Aires, República Argentina, Laboratorio de Servicios a la Industria y al Sistema Científico (UNLP-CIC-CONICET), Camino Centenario, Gonnet, Buenos Aires, República Argentina, Institute of Chemistry, Chinese Academy of Sciences, Beijing 100080, People’s
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Iriarte AG, Erben MF, Gholivand K, Jios JL, Ulic SE, Della Védova CO. [Chloro(difluoro)acetyl]phosphoramidic acid dichloride ClF2CC(O)NHP(O)Cl2, synthesis, vibrational and NMR spectra and theoretical calculations. J Mol Struct 2008. [DOI: 10.1016/j.molstruc.2007.10.036] [Citation(s) in RCA: 34] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/01/2022]
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Ulic SE, Védova COD, Hermann A, Mack HG, Oberhammer H. Preparation and Properties of Trifluorothioacetic Acid- S-(trifluoromethyl)ester, CF 3C(O)SCF 3. J Phys Chem A 2008; 112:6211-6. [DOI: 10.1021/jp800344m] [Citation(s) in RCA: 25] [Impact Index Per Article: 1.6] [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)
- Sonia E. Ulic
- CEQUINOR, Departamento de Química, Facultad de Ciencias Exactas, Universidad Nacional de La Plata, 47 esq. 115, 1900 La Plata, Argentina, Departamento de Ciencias Básicas, Universidad Nacional de Luján, Rutas 5 y 7, 6700 Luján, Argentina, and Institut für Physikalische and Theoretische Chemie, Universität Tübingen, Auf der Morgenstelle 8, 72076 Tübingen, Germany
| | - Carlos O. Della Védova
- CEQUINOR, Departamento de Química, Facultad de Ciencias Exactas, Universidad Nacional de La Plata, 47 esq. 115, 1900 La Plata, Argentina, Departamento de Ciencias Básicas, Universidad Nacional de Luján, Rutas 5 y 7, 6700 Luján, Argentina, and Institut für Physikalische and Theoretische Chemie, Universität Tübingen, Auf der Morgenstelle 8, 72076 Tübingen, Germany
| | - Angelika Hermann
- CEQUINOR, Departamento de Química, Facultad de Ciencias Exactas, Universidad Nacional de La Plata, 47 esq. 115, 1900 La Plata, Argentina, Departamento de Ciencias Básicas, Universidad Nacional de Luján, Rutas 5 y 7, 6700 Luján, Argentina, and Institut für Physikalische and Theoretische Chemie, Universität Tübingen, Auf der Morgenstelle 8, 72076 Tübingen, Germany
| | - Hans-Georg Mack
- CEQUINOR, Departamento de Química, Facultad de Ciencias Exactas, Universidad Nacional de La Plata, 47 esq. 115, 1900 La Plata, Argentina, Departamento de Ciencias Básicas, Universidad Nacional de Luján, Rutas 5 y 7, 6700 Luján, Argentina, and Institut für Physikalische and Theoretische Chemie, Universität Tübingen, Auf der Morgenstelle 8, 72076 Tübingen, Germany
| | - Heinz Oberhammer
- CEQUINOR, Departamento de Química, Facultad de Ciencias Exactas, Universidad Nacional de La Plata, 47 esq. 115, 1900 La Plata, Argentina, Departamento de Ciencias Básicas, Universidad Nacional de Luján, Rutas 5 y 7, 6700 Luján, Argentina, and Institut für Physikalische and Theoretische Chemie, Universität Tübingen, Auf der Morgenstelle 8, 72076 Tübingen, Germany
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24
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Ulic SE, Kosma A, Della Vedova CO, Willner H, Oberhammer H. S-(Fluoroformyl)O-(Trifluoroacetyl) Thioperoxide, FC(O)S−OC(O)CF3: Gas-Phase Structure and Conformational Properties. J Phys Chem A 2006; 110:10201-5. [PMID: 16928108 DOI: 10.1021/jp0612984] [Citation(s) in RCA: 17] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
The geometric structure and conformational properties of S-(fluoroformyl)O-(trifluoroacetyl) thioperoxide, FC(O)S-OC(O)CF3, were investigated by gas electron diffraction, matrix isolation infrared spectroscopy, and quantum chemical calculations (B3LYP with the 6-31G and aug-cc-pVTZ basis sets and MP2 with the 6-31G basis set). The experimental methods result in a mixture of two conformers with gauche conformation around the S-O bond. In the main conformer (82(7)% according to GED at 298 K), the C=O bond of the FC(O) group is oriented syn with respect to the S-O bond and phi(C-S-O-C) = 75(3) degrees . In the minor conformer (18(7)%), this C=O is oriented anti. Both conformers possess syn orientation of the C=O bond of the CF3C(O) group. The conformational properties and geometric parameters are reproduced reasonably well by the quantum chemical calculations, except for the S-O bond length, which is predicted too long by 0.04 A (B3LYP/aug-cc-pVTZ).
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Affiliation(s)
- Sonia E Ulic
- CEQUINOR Facultad de Ciencias Exactas, Universidad Nacional de La Plata, 47 esq. 115, 1900 La Plata, Argentina
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Ulic SE, Kosma A, Leibold C, Della Védova CO, Willner H, Oberhammer H. Trifluoromethanesulfenyl Acetate, CF3S−OC(O)CH3, and Trifluoromethanesulfenyl Trifluoroacetate, CF3S−OC(O)CF3: Unexpected Conformational Properties. J Phys Chem A 2005; 109:3739-44. [PMID: 16839042 DOI: 10.1021/jp0443862] [Citation(s) in RCA: 18] [Impact Index Per Article: 0.9] [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
Structural and conformational properties of two sulfenyl derivatives, trifluoromethanesulfenyl acetate, CF3S-OC(O)CH3 (1), and trifluoromethanesulfenyl trifluoroacetate, CF3S-OC(O)CF3 (2), were determined by gas electron diffraction, vibrational spectroscopy, in particular with IR (matrix) spectroscopy, which includes photochemical studies, and by quantum chemical calculations. Both compounds exist in the gas phase as a mixture of two conformers, with the prevailing component possessing a gauche structure around the S-O bond. The minor form, 15(5)% in 1 and 11(5)% in 2 according to IR(matrix) spectra, possesses an unexpected trans structure around the S-O bond. The C=O bond of the acetyl group is oriented syn with respect to the S-O bond in both conformers. UV-visible broad band irradiation of 1 and 2 isolated in inert gas matrixes causes various changes to occur. Conformational randomization clearly takes place in 2 with simultaneous formation of CF3SCF3. For 1 the only reaction channel detected leads to the formation of CH3SCF3 with the consequent extrusion of CO2. Quantum chemical calculations (B3LYP/6-31G and MP2 with 6-31G and 6-311G(2df,pd) basis sets) confirm the existence of a stable trans conformer. The calculations reproduce the conformational properties for both compounds qualitatively correct with the exception of the B3LYP method for compound 2 which predicts the trans form to be prevailing, in contrast to the experiment.
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Affiliation(s)
- Sonia E Ulic
- CEQUINOR (CONICET-UNLP), Departamento de Química, Facultad de Ciencias Exactas, Universidad Nacional de La Plata, 47 esq. 115 (1900) La Plata, República Argentina
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Ulic SE, von Ahsen S, Willner H. Photoisomerization of Matrix-Isolated Bis(trifluoromethyl) Sulfoxide: Formation of the Sulfenic Ester CF3SOCF3. Inorg Chem 2004; 43:5268-74. [PMID: 15310204 DOI: 10.1021/ic049800r] [Citation(s) in RCA: 17] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/26/2022]
Abstract
Bis(trifluoromethyl) sulfoxide, CF(3)S(O)CF(3), isolated in noble gas matrixes at low temperatures, isomerizes upon UV irradiation into the sulfenic ester CF(3)SOCF(3). The new species is characterized spectroscopically, and the vibrational assignment is supported by (18)O isotopic labeling experiments and by DFT calculations. The calculated structural parameters of CF(3)SOCF(3) are compared with the calculated and experimental data of the related compounds CF(3)SSCF(3) and CF(3)OOCF(3). In addition, the computed enthalpy differences between the sulfoxide R(2)S=O and sulfenate RSOR structures for R = H, F, CH(3), and CF(3) are included.
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Affiliation(s)
- S E Ulic
- CEQUINOR, Facultad de Ciencias Exactas, Universidad Nacional de La Plata, 47 esq. 115, 1900 La Plata, Republic of Argentina.
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Affiliation(s)
- Sonia E. Ulic
- CEQUINOR, 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, República Argentina and Institut für Physikalische und Theoretische Chemie, Universität Tübingen, 72076 Tübingen, Germany
| | - Heinz Oberhammer
- CEQUINOR, 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, República Argentina and Institut für Physikalische und Theoretische Chemie, Universität Tübingen, 72076 Tübingen, Germany
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Ulic SE, Della Védova CO, Hermann A, Mack HG, Oberhammer H. Trifluoroacetylsulfenyl trifluoroacetate, CF(3)C(O)-S-O-C(O)CF(3), a novel compound with a symmetrically substituted S-O bond: synthesis, spectroscopic characterization, and quantum chemical calculations. Inorg Chem 2002; 41:5699-705. [PMID: 12401074 DOI: 10.1021/ic025659f] [Citation(s) in RCA: 29] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
The new compound trifluoroacetylsulfenyl trifluoroacetate, CF(3)C(O)SOC(O)CF(3), which possesses two identical carbonyl substituents attached to the S-O bond, has been synthesized. The IR and UV spectra of the gas phase as well as the (13)C NMR spectrum of the solution in CDCl(3) were recorded and assigned. Quantum chemical calculations were performed with the ab initio methods HF and MP2 and the density functional approach B3LYP. The 6-31G basis set was chosen in all calculations. The molecule possesses a skew structure, and according to all computational methods, the syn-syn structure (C=O bonds of both C(O)CF(3) groups synperiplanar to S-O bond) represents the most stable conformer. In agreement with the quantum chemical calculations, the presence of small amounts (< or =5%) of a second conformer (anti-syn) cannot be excluded on the basis of the IR spectrum. The calculated values for the torsional angle around the S-O bond (delta(C-S-O-C)) of the syn-syn form are smaller than 80 degrees (72-78 degrees). Comparison with theoretical results for the corresponding disulfide CF(3)C(O)SSC(O)CF(3) and peroxide CF(3)C(O)OOC(O)CF(3) indicates that the structural properties of sulfenyl compounds are more similar to those of disulfides than to those of peroxides.
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Affiliation(s)
- S E Ulic
- CEQUINOR Facultad de Ciencias Exactas, Universidad Nacional de La Plata, 47 esq. 115, (1900) La Plata, República Argentina
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Bodenbinder M, Ulic SE, Willner H. A Gas-Phase and Matrix Isolation Study of the Equilibrium CH3ONO (cis) .dblarw. CH3ONO (trans) by FTIR Spectroscopy. ACTA ACUST UNITED AC 2002. [DOI: 10.1021/j100077a004] [Citation(s) in RCA: 58] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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Arguello GA, Juelicher B, Ulic SE, Willner H, Casper B, Mack HG, Oberhammer H. The Equilibrium between cis- and trans-Fluoroformyl Hypofluorite, FC(O)OF. Thermodynamic Properties, Molecular Structures, and Vibrational Spectra. Inorg Chem 2002. [DOI: 10.1021/ic00112a022] [Citation(s) in RCA: 25] [Impact Index Per Article: 1.1] [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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Casper B, Dixon DA, Mack HG, Ulic SE, Willner H, Oberhammer H. Molecular Structure of Fluorine Nitrate: Dangerous for Experiment and Theory. J Am Chem Soc 2002. [DOI: 10.1021/ja00097a044] [Citation(s) in RCA: 26] [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] [Indexed: 11/29/2022]
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Schiavoni MM, Mack HG, Ulic SE, Della Védova CO. Tautomers and conformers of malonamide, NH2-C(O)-CH2-C(O)-NH2: vibrational analysis, NMR spectra and ab initio calculations. Spectrochim Acta A Mol Biomol Spectrosc 2000; 56A:1533-1541. [PMID: 10907882 DOI: 10.1016/s1386-1425(99)00276-0] [Citation(s) in RCA: 16] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/23/2023]
Abstract
The conformational and tautomeric compositions of malonamide, NH2-C(O)-CH2-C(O)-NH2 were determined by vibrational spectroscopy and theoretical calculations (HF/6-31G*, B3PW91/6-31G*). Solid state Fourier transform infrared and Raman spectra were analysed. They reveal the existence of a diketo tautomer. Theoretical calculations predict a diketo structure belonging to the C1 symmetry group. No enol form is present in the molecule in the solid. 13C-NMR studies show only signals of a diketo tautomer.
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Affiliation(s)
- M M Schiavoni
- LADECOR, Departamento de Química, Facultad de Ciencias Exactas, Universidad Nacional de La Plata, Argentina
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Gobbato KI, Mack HG, Oberhammer H, Ulic SE, Della Védova CO, Willner H. Structures and Conformations of CF3SC(O)F and CF3SC(O)Cl: Gas-Phase Electron Diffraction, Vibrational Analysis, and Theoretical Calculations. J Phys Chem A 1997. [DOI: 10.1021/jp963435a] [Citation(s) in RCA: 13] [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: 11/30/2022]
Affiliation(s)
- Karina I. Gobbato
- Institut für Physikalische und Theoretische Chemie, Universität Tübingen, Auf der Morgenstelle 8, D-72076 Tübingen, Germany, Facultad de Ciencias Exactas, Universidad Nacional de la Plata, Departamento de Quimica, Quimica Inorganica, 1900 La Plata, Argentina, Departamento de Ciencias Básicas, Universidad Nacional de Luján, Argentina, and Institut für Anorganische Chemie, Universität Hannover, Callinstr. 9, D-30167 Hannover, Germany
| | - Hans-Georg Mack
- Institut für Physikalische und Theoretische Chemie, Universität Tübingen, Auf der Morgenstelle 8, D-72076 Tübingen, Germany, Facultad de Ciencias Exactas, Universidad Nacional de la Plata, Departamento de Quimica, Quimica Inorganica, 1900 La Plata, Argentina, Departamento de Ciencias Básicas, Universidad Nacional de Luján, Argentina, and Institut für Anorganische Chemie, Universität Hannover, Callinstr. 9, D-30167 Hannover, Germany
| | - Heinz Oberhammer
- Institut für Physikalische und Theoretische Chemie, Universität Tübingen, Auf der Morgenstelle 8, D-72076 Tübingen, Germany, Facultad de Ciencias Exactas, Universidad Nacional de la Plata, Departamento de Quimica, Quimica Inorganica, 1900 La Plata, Argentina, Departamento de Ciencias Básicas, Universidad Nacional de Luján, Argentina, and Institut für Anorganische Chemie, Universität Hannover, Callinstr. 9, D-30167 Hannover, Germany
| | - Sonia E. Ulic
- Institut für Physikalische und Theoretische Chemie, Universität Tübingen, Auf der Morgenstelle 8, D-72076 Tübingen, Germany, Facultad de Ciencias Exactas, Universidad Nacional de la Plata, Departamento de Quimica, Quimica Inorganica, 1900 La Plata, Argentina, Departamento de Ciencias Básicas, Universidad Nacional de Luján, Argentina, and Institut für Anorganische Chemie, Universität Hannover, Callinstr. 9, D-30167 Hannover, Germany
| | - Carlos O. Della Védova
- Institut für Physikalische und Theoretische Chemie, Universität Tübingen, Auf der Morgenstelle 8, D-72076 Tübingen, Germany, Facultad de Ciencias Exactas, Universidad Nacional de la Plata, Departamento de Quimica, Quimica Inorganica, 1900 La Plata, Argentina, Departamento de Ciencias Básicas, Universidad Nacional de Luján, Argentina, and Institut für Anorganische Chemie, Universität Hannover, Callinstr. 9, D-30167 Hannover, Germany
| | - Helge Willner
- Institut für Physikalische und Theoretische Chemie, Universität Tübingen, Auf der Morgenstelle 8, D-72076 Tübingen, Germany, Facultad de Ciencias Exactas, Universidad Nacional de la Plata, Departamento de Quimica, Quimica Inorganica, 1900 La Plata, Argentina, Departamento de Ciencias Básicas, Universidad Nacional de Luján, Argentina, and Institut für Anorganische Chemie, Universität Hannover, Callinstr. 9, D-30167 Hannover, Germany
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Gobbato KI, Oberhammer H, Klapdor MF, Mootz D, Poll W, Ulic SE, Willner H. Bis(trifluoromethyl)trioxide: First Structure of a Straight-Chain Trioxide. Angew Chem Int Ed Engl 1995. [DOI: 10.1002/anie.199522441] [Citation(s) in RCA: 9] [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: 11/12/2022]
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Gobbato KI, Oberhammer H, Klapdor MF, Mootz D, Poll W, Ulic SE, Willner H. Bis(trifluormethyl)trioxid: erste Strukturanalyse eines offenkettigen Trioxids. Angew Chem Int Ed Engl 1995. [DOI: 10.1002/ange.19951072017] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
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