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Rendošová M, Gyepes R, Kello M, Vilková M, Mudroňová D, Olejníková P, Cardiano P, Gama S, Milea D, Vargová Z. Silver(I) pyrrole- and furan-2-carboxylate complexes - From their design and characterization to antimicrobial, anticancer activity, lipophilicity and SAR. J Inorg Biochem 2023; 246:112266. [PMID: 37271621 DOI: 10.1016/j.jinorgbio.2023.112266] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/29/2023] [Revised: 05/16/2023] [Accepted: 05/23/2023] [Indexed: 06/06/2023]
Abstract
Two silver(I) complexes with biologically relevant heterocyclic ligands, pyrrole and furan-2- carboxylic acid, were synthesized and their composition was confirmed using elemental, spectral, thermal and structural analyses. The {[Ag(Py2c)]}n (AgPy2c, Py2c = pyrrole-2-carboxylate) and {[Ag(Fu2c)]}n (AgFu2c, Fu2c = furan-2-carboxylate) solubility and stability in biological test stock solution were confirmed by 1H NMR spectroscopy. The X-ray analysis has enabled us to determine typical argentophilic interactions and bridging carboxylate coordination mode of both ligands. Potentiometric data analysis by BSTAC program resulted in the determination of the stability constant of only one species, i.e., the ML (M = Ag+, L = Fu2c-), log βML = 0.59 ± 0.04. Antimicrobial and anticancer tests were performed against selected microorganisms and cell lines with new silver(I) complexes and compared with AgSD (silver(I) sulfadiazine) and cisplatin. From their microbial toxicity point of view, selectivity was determined against lactobacilli (AgPy2c is 8× more effective against S. aureus and E. coli and AgFu2c is 8× more effective against E. coli and 4× against S. aureus). AgFu2c significant anticancer activity was determined against Jurkat cell lines (IC50 = 8.00 μM) and was similar to cisPt (IC50 = 6.3 μM) similarly to its selectivity (SI (AgFu2c) = 7.3, SI (cisPt) = 6.4, SI = selectivity index). In addition, cell cycle arrest was observed already in the Sub-G0 phase during a flow cytometry experiment. To evaluate the AgPy2c and AgFu2c bioavailability we also discuss their Lipinski's Rule of Five.
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Affiliation(s)
- Michaela Rendošová
- Institute of Chemistry, Pavol Jozef Šafarik University, Moyzesova 11, 041 54 Košice, Slovakia
| | - Róbert Gyepes
- Institute of Chemistry, Charles University, Hlavova 2030, 128 00 Praha, Czechia
| | - Martin Kello
- Department of Pharmacology, Faculty of Medicine, Pavol Jozef Šafárik University, Trieda SNP 1, 040 11 Košice, Slovakia
| | - Mária Vilková
- Institute of Chemistry, Pavol Jozef Šafarik University, Moyzesova 11, 041 54 Košice, Slovakia
| | - Dagmar Mudroňová
- Department of Microbiology and Immunology, University of Veterinary Medicine and Pharmacy, Komenského 73, 041 81 Košice, Slovakia
| | - Petra Olejníková
- Department of Biochemistry and Microbiology, Slovak University of Technology, Radlinského 9, 812 37 Bratislava, Slovakia
| | - Paola Cardiano
- Dipartimento di Scienze Chimiche, Biologiche, Farmaceutiche ed Ambientali, CHIBIOFARAM, Università degli Studi di Messina, V.le F. Stagno d'Alcontres, 31, 98166 Messina, Italy
| | - Sofia Gama
- Centro de Ciências e Tecnologias Nucleares, Instituto Superior Técnico, Universidade de Lisboa, Estrada Nacional 10 (km 1397), 2695-066 Bobadela LRS, Portugal
| | - Demetrio Milea
- Dipartimento di Scienze Chimiche, Biologiche, Farmaceutiche ed Ambientali, CHIBIOFARAM, Università degli Studi di Messina, V.le F. Stagno d'Alcontres, 31, 98166 Messina, Italy
| | - Zuzana Vargová
- Institute of Chemistry, Pavol Jozef Šafarik University, Moyzesova 11, 041 54 Košice, Slovakia.
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Roque JPL, Sharma A, Rosado MTS, Fausto R, Reva I. Vibrationally Induced Conformational Isomerization and Tunneling in Pyrrole-2-Carboxylic Acid. J Phys Chem A 2020; 124:10277-10287. [PMID: 33245233 DOI: 10.1021/acs.jpca.0c09141] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
The conformational behavior of carboxylic acids has attracted considerable attention, as it can be used as a gateway for the study of more complex phenomena. Here, we present an experimental and computational study of pyrrole-2-carboxylic acid (PCA) conformational space and the vibrational characterization of the compound by infrared spectroscopy. The possibility of promoting conformational transformations using selective vibrational excitation of the 2ν(OH) and 2ν(NH) stretching overtones is explored. Two conformers, exhibiting the cis configuration of the COOH group (O═C-O-H dihedral angle near 0°) and differing by the orientation of the carboxylic group with respect to the pyrrole ring (i.e., showing either a cis or a trans NCC═O arrangement), were found to coexist initially for the compound isolated in a cryogenic nitrogen matrix, in an 86:14 ratio, and were characterized by infrared spectroscopy. A third conformer, with the COOH group in the trans configuration, was produced, in situ, by narrowband near-infrared (NIR) excitation of the most stable PCA form (with a cis NCC═O moiety). The photogenerated PCA conformer was found to decay back to the most stable PCA form, by H-atom quantum mechanical tunneling, with a characteristic half-life time of ∼10 min in the nitrogen matrix at 10 K. Tunneling rates were theoretically estimated and compared for the observed isomerization of pyrrole-2-carboxylic acid and for the structurally similar furan-2-carboxylic acid. This comparison showcases the effect of small modifications in the potential energy surface and the implications of quantum tunneling for the stability of short-living species.
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Affiliation(s)
- José P L Roque
- CQC, Department of Chemistry, University of Coimbra, Coimbra 3004-535, Portugal
| | - Archna Sharma
- CQC, Department of Chemistry, University of Coimbra, Coimbra 3004-535, Portugal.,Department of Physics, University of Jammu, Jammu 180001, India
| | - Mário T S Rosado
- CQC, Department of Chemistry, University of Coimbra, Coimbra 3004-535, Portugal
| | - Rui Fausto
- CQC, Department of Chemistry, University of Coimbra, Coimbra 3004-535, Portugal
| | - Igor Reva
- CQC, Department of Chemistry, University of Coimbra, Coimbra 3004-535, Portugal
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Malaganvi SS, Tonannavar (Yenagi) J, Tonannavar J. Experimental, DFT dimeric modeling and AIM study of H-bond-mediated composite vibrational structure of Chelidonic acid. Heliyon 2019; 5:e01586. [PMID: 31193235 PMCID: PMC6522660 DOI: 10.1016/j.heliyon.2019.e01586] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/06/2018] [Revised: 03/28/2019] [Accepted: 04/24/2019] [Indexed: 12/12/2022] Open
Abstract
The composite vibrational structure near 3650–3200 and 3000–2400 cm−1 in the observed IR absorption spectrum of Chelidonic acid has been explained in terms of intra- and inter-molecular −O−H∙∙∙O H-bonding attributed to monomer and dimer species computed at B3LYP/6–311++G(d,p) level. Three of the six dimer species derived out of ten monomeric components have shown both intra- and inter-molecular H-bonding. Vibrational modes of the monomer and dimer species are satisfactorily identified with the observed IR and Raman bands including frequency shifts associated with the H-bondings. The H-bond interactions in the monomer and dimer species have been characterized in terms of electron density, ρ(r), its Laplacian, ∇2ρ(r) and potential energy density at the O∙∙∙H bond critical points (BCPs) based on the Atoms in Molecules (AIM) theory. The attractive (van der Waals, H-bonds) and repulsive steric clash (SC) interactions are explained using computed reduced density gradient values from the noncovalent interaction (NCI) method. The AIM analysis confirms the presence of the intra- and inter-molecular H-bondings in the monomer/dimer species. The natural bond orbital (NBO) analysis of the natural charges and stabilization energy of the H-bonds for the dimer species further points to the stronger inter-than intra-molecular H-bonding.
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Mizera A, Grabowski SJ, Ławniczak P, Wysocka-Żołopa M, Dubis AT, Łapiński A. A study of the optical, electrical and structural properties of poly(pyrrole-3,4-dicarboxylic acid). POLYMER 2019. [DOI: 10.1016/j.polymer.2018.12.056] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
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Zimmer GC, Pagliari AB, Bender CR, Salbego PRS, Orlando T, Hörner M, Zanatta N, Bonacorso HG, Martins MAP. Insights on conformation in the solid state: a case study – s-cis and/or s-trans crystallization of 5(3)-aryl-3(5)-carboxyethyl-1-tert-butylpyrazoles. CrystEngComm 2018. [DOI: 10.1039/c8ce00984h] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The conformation adopted by COOEt group in solid state were influenced by supramolecular environment and intramolecular interaction for 1,3- and 1,5-regioisomers, respectively.
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Affiliation(s)
- Geórgia C. Zimmer
- Núcleo de Química de Heterociclos (NUQUIMHE)
- Department of Chemistry
- Federal University of Santa Maria (UFSM)
- CEP 97105-900 Santa Maria
- Brazil
| | - Anderson B. Pagliari
- Núcleo de Química de Heterociclos (NUQUIMHE)
- Department of Chemistry
- Federal University of Santa Maria (UFSM)
- CEP 97105-900 Santa Maria
- Brazil
| | - Caroline R. Bender
- Núcleo de Química de Heterociclos (NUQUIMHE)
- Department of Chemistry
- Federal University of Santa Maria (UFSM)
- CEP 97105-900 Santa Maria
- Brazil
| | - Paulo R. S. Salbego
- Núcleo de Química de Heterociclos (NUQUIMHE)
- Department of Chemistry
- Federal University of Santa Maria (UFSM)
- CEP 97105-900 Santa Maria
- Brazil
| | - Tainára Orlando
- Núcleo de Química de Heterociclos (NUQUIMHE)
- Department of Chemistry
- Federal University of Santa Maria (UFSM)
- CEP 97105-900 Santa Maria
- Brazil
| | - Manfredo Hörner
- Núcleo de Química de Heterociclos (NUQUIMHE)
- Department of Chemistry
- Federal University of Santa Maria (UFSM)
- CEP 97105-900 Santa Maria
- Brazil
| | - Nilo Zanatta
- Núcleo de Química de Heterociclos (NUQUIMHE)
- Department of Chemistry
- Federal University of Santa Maria (UFSM)
- CEP 97105-900 Santa Maria
- Brazil
| | - Helio G. Bonacorso
- Núcleo de Química de Heterociclos (NUQUIMHE)
- Department of Chemistry
- Federal University of Santa Maria (UFSM)
- CEP 97105-900 Santa Maria
- Brazil
| | - Marcos A. P. Martins
- Núcleo de Química de Heterociclos (NUQUIMHE)
- Department of Chemistry
- Federal University of Santa Maria (UFSM)
- CEP 97105-900 Santa Maria
- Brazil
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Tautomerism in o-hydroxyanilino-1,4-naphthoquinone derivatives: Structure, NMR, HPLC and density functional theoretic investigations. J Mol Struct 2016. [DOI: 10.1016/j.molstruc.2016.06.026] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
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7
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Rao SS, Gejji SP. Electronic Structure, NMR, Spin-Spin Coupling, and Noncovalent Interactions in Aromatic Amino Acid Based Ionic Liquids. J Phys Chem A 2016; 120:5665-84. [PMID: 27336283 DOI: 10.1021/acs.jpca.6b03985] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
Noncovalent interactions accompanying phenylalanine (Phe), tryptophan (Trp), and tyrosine (Tyr) amino acids based ionic liquids (AAILs) composed of 1-methyl-3-butyl-imidazole and its methyl-substituted derivative as cations have been analyzed employing the dispersion corrected density functional theory. It has been shown that cation-anion binding in these bioionic ILs is primarily facilitated through hydrogen bonding in addition to lp---π and CH---π interactions those arising from aromatic moieties which can be probed through (1)H and (13)C NMR spectra calculated from the gauge independent atomic orbital method. Characteristic NMR spin-spin coupling constants across hydrogen bonds of ion pair structures viz., Fermi contact, spin-orbit and spin-dipole terms show strong dependence on mutual orientation of cation with the amino acid anion. The spin-spin coupling mechanism transmits spin polarization via electric field effect originating from lp---π interactions whereas the electron delocalization from lone pair on the carbonyl oxygen to antibonding C-H orbital is facilitated by hydrogen bonding. It has been demonstrated that indirect spin-spin coupling constants across the hydrogen bonds correlate linearly with hydrogen bond distances. The binding energies and dissected nucleus independent chemical shifts (NICS) document mutual reduction of aromaticity of hydrogen bonded ion pairs consequent to localization of π-character. Moreover the nature and type of such noncovalent interactions governing the in-plane and out-of-plane NICS components provide a measure of diatropic and paratropic currents for the aromatic rings of varying size in AAILs. Besides the direction of frequency shifts of characteristic C═O and NH stretching vibrations in the calculated vibrational spectra has been rationalized.
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Affiliation(s)
- Soniya S Rao
- Department of Chemistry, Savitribai Phule Pune University , Pune 411 007, India
| | - Shridhar P Gejji
- Department of Chemistry, Savitribai Phule Pune University , Pune 411 007, India
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Świderski G, Kalinowska M, Wojtulewski S, Lewandowski W. The experimental and theoretical study on the influence of alkali metals on the electronic charge distribution in five-membered aromatic acids (2-thiophenecarboxylic, 2-furanecarboxylic and 2-pyrrolecarboxylic acids). Polyhedron 2015. [DOI: 10.1016/j.poly.2015.05.014] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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9
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Matczak P, Domagała M, Domagała S. Conformers of diheteroaryl ketones and thioketones: a quantum chemical study of their properties and fundamental intramolecular energetic effects. Struct Chem 2015. [DOI: 10.1007/s11224-015-0643-3] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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10
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Dubis AT, Stasiewicz P, Pogorzelec-Glaser K, Łapiński A. Can 2-acylpyrroles form an intramolecular hydrogen bond? J PHYS ORG CHEM 2015. [DOI: 10.1002/poc.3468] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Affiliation(s)
- Alina T. Dubis
- Institute of Chemistry; University of Bialystok; Hurtowa 1 15-399 Bialystok Poland
| | - Piotr Stasiewicz
- Institute of Chemistry; University of Bialystok; Hurtowa 1 15-399 Bialystok Poland
| | | | - Andrzej Łapiński
- Institute of Molecular Physics; Polish Academy of Sciences; ul. Smoluchowskiego 17 60-179 Poznan Poland
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Rawat P, Singh R. Evaluation of molecular assembly, spectroscopic interpretation, intra-/inter molecular hydrogen bonding and chemical reactivity of two pyrrole precursors. J Mol Struct 2014. [DOI: 10.1016/j.molstruc.2014.07.012] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
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12
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13
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Singh R, Kumar A, Tiwari R, Rawat P, Gupta V. A combined experimental and quantum chemical (DFT and AIM) study on molecular structure, spectroscopic properties, NBO and multiple interaction analysis in a novel ethyl 4-[2-(carbamoyl)hydrazinylidene]-3,5-dimethyl-1H-pyrrole-2-carboxylate and its dimer. J Mol Struct 2013. [DOI: 10.1016/j.molstruc.2012.11.059] [Citation(s) in RCA: 53] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
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14
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Synthesis of diosgenin p-nitrobenzoate by Steglich method, its crystal structure and quantum chemical studies. J Mol Struct 2012. [DOI: 10.1016/j.molstruc.2012.05.057] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
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15
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Świderski G, Wojtulewski S, Kalinowska M, Świsłocka R, Lewandowski W. Effect of alkali metal ions on the pyrrole and pyridine π-electron systems in pyrrole-2-carboxylate and pyridine-2-carboxylate molecules: FT-IR, FT-Raman, NMR and theoretical studies. J Mol Struct 2011. [DOI: 10.1016/j.molstruc.2011.01.026] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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16
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Irshaidat T. On the factors affecting tautomerism: consequences of N-substituents (Me/NR 2) in structures derived from salicylaldimines. MOLECULAR SIMULATION 2010. [DOI: 10.1080/08927020903096080] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
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17
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Dubis AT, Domagała M, Grabowski SJ. Spectroscopic and theoretical studies on some new pyrrol-2-yl-chloromethyl ketones. NEW J CHEM 2010. [DOI: 10.1039/b9nj00507b] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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18
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Santos AFLOM, Silva MAVRD. Experimental and Computational Study on the Molecular Energetics of 2-Pyrrolecarboxylic Acid and 1-Methyl-2-pyrrolecarboxylic Acid. J Phys Chem A 2009; 113:9741-50. [DOI: 10.1021/jp905375h] [Citation(s) in RCA: 33] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Ana Filipa L. O. M. Santos
- Centro de Investigação em Química, Department of Chemistry, Faculty of Science, University of Porto, Rua do Campo Alegre, 687, P-4169-007 Porto, Portugal
| | - Manuel A. V. Ribeiro da Silva
- Centro de Investigação em Química, Department of Chemistry, Faculty of Science, University of Porto, Rua do Campo Alegre, 687, P-4169-007 Porto, Portugal
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Sahoo D, Adhikary T, Chowdhury P, Chakravorti S. Theoretical study of excited state proton transfer in pyrrole-2-carboxylic acid. Mol Phys 2008. [DOI: 10.1080/00268970802258583] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
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20
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Irshaidat T. Some physical organic aspects of salicylaldehydes oximes, a theoretical study. Tetrahedron Lett 2008. [DOI: 10.1016/j.tetlet.2007.11.145] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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21
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Mariam YH, Musin RN. Transition from Moderate to Strong Hydrogen Bonds: Its Identification and Physical Bases in the Case of O−H···O Intramolecular Hydrogen Bonds. J Phys Chem A 2007; 112:134-45. [DOI: 10.1021/jp076668i] [Citation(s) in RCA: 35] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/30/2023]
Affiliation(s)
- Yitbarek H. Mariam
- Department of Chemistry and Center for Theoretical Studies of Physical Systems, Clark Atlanta University, Atlanta, Georgia 30314
| | - Ryza N. Musin
- Department of Chemistry and Center for Theoretical Studies of Physical Systems, Clark Atlanta University, Atlanta, Georgia 30314
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Inter- and intramolecular hydrogen bonds – Structures of 1-methylpyrrole-2-carboxamide and 1-hydroxypyrrole-2-carboxamide. J Mol Struct 2007. [DOI: 10.1016/j.molstruc.2007.03.053] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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23
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Tsuchida N, Satou H, Yamabe S. Reaction Paths of the Water-Assisted Solvolysis of N,N-Dimethylformamide. J Phys Chem A 2007; 111:6296-303. [PMID: 17580828 DOI: 10.1021/jp068051r] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Density functional theory calculations were conducted on the title reactions with explicit inclusion of a variety of water molecules, H-CO-NMe2+MeOH+(H2O)n-->H-CO-OMe+HNMe2+(H2O)n. Geometries of transition states, reactant-like complexes and product-like ones were determined by the use of RB3LYP/6-31G(d) SCRF=dipole. Concerted paths were examined with n=0-3. Their Gibbs activation energies are larger than the experimental value. Stepwise paths were also investigated with n=2-4. The n=4 model has the energy close to the experimental value. However, when the catalytic water molecules were added to the n=4 one, the stepwise path was switched to the concerted one. A systematic comparison of the concerted path with n=2+1, 2+2, 2+3, 2+4, 2+5, 2+4+4, and 2+5+5 models was made, and the water-dimer based reaction path was found to be most favorable. The contrast between the concerted path of the amide solvolysis (and hydrolysis) and the stepwise one of the ester hydrolysis was discussed in terms of the frontier-orbital theory.
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Affiliation(s)
- Noriko Tsuchida
- Department of Chemistry, Nara University of Education; Takabakake-cho, Nara 630-8528, Japan
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Grabowski SJ, Dubis AT, Palusiak M, Leszczynski J. Heteronuclear Intermolecular Resonance-Assisted Hydrogen Bonds. The Structure of Pyrrole-2-Carboxamide (PyCa). J Phys Chem B 2006; 110:5875-82. [PMID: 16553393 DOI: 10.1021/jp055334v] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
The crystal and molecular structure of pyrrole-2-carboxamide (PyCa) determined by single crystal X-ray diffraction is presented. Molecular conformations of PyCa are also analyzed by FT-IR and NMR techniques. Additionally DFT calculations at the B3LYP/6-311++G(d,p) level of approximation are performed for dimers of PyCa and for related species. The existence of two tautomeric forms for the analyzed dimers differing in H-bond motifs, N-H...O or O-H...N, is studied. The geometrical and energetic features of such H-bonds show that these interactions may be classified as intermolecular resonance-assisted hydrogen bonds. Additionally the Bader theory is applied to determine and to analyze bond critical points.
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Affiliation(s)
- Sławomir J Grabowski
- Department of Crystallography and Crystal Chemistry, University of Lodź, ul. Pomorska 149/153, 90-236 L-odź, Poland
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Sobczyk L, Grabowski SJ, Krygowski TM. Interrelation between H-bond and Pi-electron delocalization. Chem Rev 2005; 105:3513-60. [PMID: 16218560 DOI: 10.1021/cr030083c] [Citation(s) in RCA: 528] [Impact Index Per Article: 27.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Lucjan Sobczyk
- Faculty of Chemistry, University of Wrocław, Joliot-Curie 14, 50 383 Wrocław, Poland
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Merino G, Vela A, Heine T. Description of Electron Delocalization via the Analysis of Molecular Fields. Chem Rev 2005; 105:3812-41. [PMID: 16218568 DOI: 10.1021/cr030086p] [Citation(s) in RCA: 146] [Impact Index Per Article: 7.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Gabriel Merino
- Institut für Physikalische Chemie und Elektrochemie, TU Dresden, D-01062 Dresden, Germany.
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Gora RW, Grabowski SJ, Leszczynski J. Dimers of Formic Acid, Acetic Acid, Formamide and Pyrrole-2-carboxylic Acid: an Ab Initio Study. J Phys Chem A 2005; 109:6397-405. [PMID: 16833984 DOI: 10.1021/jp044072e] [Citation(s) in RCA: 139] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/10/2023]
Abstract
The intermolecular hydrogen bonds in dimers of formic acid, acetic acid, and formamide were investigated. Additionally, three configurations of the pyrrole-2-carboxylic acid (PCA) dimer were studied to analyze how the pyrrole pi-electron system influences the carboxylic groups connected by double O-H...O hydrogen bonds. The ab initio calculations for the systems investigated were performed at MP2/6-311++G(d,p), MP2/aug-cc-pVDZ, and MP2/aug-cc-pVTZ//MP2/aug-cc-pVDZ levels of theory. The "atoms in molecules" theory of Bader was used and the analysis of the critical points was performed to study the nature of hydrogen bonds. The decomposition of the total interaction energy applied here reveals that the delocalization energy term is a particularly important attractive contribution in these systems, more important in the case of systems forming homonuclear O-H...O double hydrogen bonds than in the case of those connected through heteronuclear N-H...O bonds. Because the systems analyzed may be formally classified as the resonance-assisted hydrogen bonds (RAHBs), it seems that the dominant contribution from the delocalization interaction energy term is a distinguished feature of such interactions.
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Affiliation(s)
- Robert W Gora
- Institute of Physical and Theoretical Chemistry, Wrocław University of Technology, Wyb. Wyspiańskiego 27, 50-370 Wrocław, Poland
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Gilli P, Bertolasi V, Pretto L, Antonov L, Gilli G. Variable-Temperature X-ray Crystallographic and DFT Computational Study of the NH···O/N···HO Tautomeric Competition in 1-(Arylazo)-2-naphthols. Outline of a Transiton-State Hydrogen-Bond Theory. J Am Chem Soc 2005; 127:4943-53. [PMID: 15796560 DOI: 10.1021/ja0453984] [Citation(s) in RCA: 115] [Impact Index Per Article: 6.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Phenyl-substituted 1-arylazo-2-naphthols (AAN) display ...HN-N=C-C=O... <==>...N=N-C=C-OH... ketohydrazone-azoenol tautomerism and can form intramolecular resonance-assisted H-bonds from pure N-H...O to pure N...H-O through tautomeric and dynamically disordered N-H...O <==>N...H-O bonds according to the electronic properties of their substituents. Three compounds of this series (m-OCH(3)-AAN = mOM; p-Cl-AAN = pCl; and p-NMe(2)-AAN = pNM2) have been studied by X-ray crystallography at four temperatures (100-295 K), showing that the remarkably short H-bonds formed (2.53 < or = d(N...O) < or = 2.55 A) are a pure N-H...O in mOM, a dynamically disordered mixture in pCl (N-H...O:N...H-O = 69:31 at 100 K), and a statically disordered mixture in pNM2 (N-H...O:N...H-O = 21:79 at 100 K). These compounds, integrated by the p-H-, p-NO(2)-, p-F-, and p-O(-)-substituted derivatives, have been emulated by DFT methods (B3LYP/6-31+G(d,p) level) with full geometry optimization of the stationary points along the proton-transfer (PT) pathway: N-H...O and N...H-O ground states and N...H...O transition state. Analysis of DFT-calculated energies and geometries by the methods of the rate-equilibrium Marcus theory shows that all H-bond features (stability and tautomerism, as well as position and height of the PT barrier) can be coherently interpreted in the frame of the transition-state (or activated-complex) theory by considering the bond as a chemical reaction N-H...O <==> N...H...O <==> N...H-O which is bimolecular in both directions and proceeds via the N...H...O PT transition state (the activated complex).
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Affiliation(s)
- Paola Gilli
- Centro di Strutturistica Diffrattometrica and Dipartimento di Chimica, Università di Ferrara, I-44100 Ferrara, Italy.
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Wojtulewski S, Grabowski SJ. Blue-shifting C–H…Y intramolecular hydrogen bonds – DFT and AIM analyses. Chem Phys 2005. [DOI: 10.1016/j.chemphys.2004.09.008] [Citation(s) in RCA: 47] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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