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Shiroudi A, Śmiechowski M, Czub J, Abdel-Rahman MA. Computational analysis of substituent effects on proton affinity and gas-phase basicity of TEMPO derivatives and their hydrogen bonding interactions with water molecules. Sci Rep 2024; 14:8434. [PMID: 38600208 PMCID: PMC11006853 DOI: 10.1038/s41598-024-58582-x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/20/2024] [Accepted: 04/01/2024] [Indexed: 04/12/2024] Open
Abstract
The study investigates the molecular structure of 2,2,6,6-tetramethylpiperidine-1-oxyl (TEMPO) and its derivatives in the gas phase using B3LYP and M06-2X functional methods. Intermolecular interactions are analyzed using natural bond orbital (NBO) and atoms in molecules (AIM) techniques. NO2-substituted TEMPO displays high reactivity, less stability, and softer properties. The study reveals that the stability of TEMPO derivatives is mainly influenced by LP(e) → σ∗ electronic delocalization effects, with the highest stabilization observed on the oxygen atom of the nitroxide moiety. This work also considers electron density, atomic charges, and energetic and thermodynamic properties of the studied NO radicals, and their relative stability. The proton affinity and gas-phase basicity of the studied compounds were computed at T = 298 K for O-protonation and N-protonation, respectively. The studied DFT method calculations show that O-protonation is more stable than N-protonation, with an energy difference of 16.64-20.77 kcal/mol (22.80-25.68 kcal/mol) at the B3LYP (M06-2X) method. The AIM analysis reveals that the N-O…H interaction in H2O complexes has the most favorable hydrogen bond energy computed at bond critical points (3, - 1), and the planar configurations of TEMPO derivatives exhibit the highest EHB values. This indicates stronger hydrogen bonding interactions between the N-O group and water molecules.
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Affiliation(s)
- Abolfazl Shiroudi
- Department of Physical Chemistry, Gdańsk University of Technology, Narutowicza 11/12, 80-233, Gdańsk, Poland.
- BioTechMed Center, Gdańsk University of Technology, 80-233, Gdańsk, Poland.
| | - Maciej Śmiechowski
- Department of Physical Chemistry, Gdańsk University of Technology, Narutowicza 11/12, 80-233, Gdańsk, Poland
| | - Jacek Czub
- Department of Physical Chemistry, Gdańsk University of Technology, Narutowicza 11/12, 80-233, Gdańsk, Poland
- BioTechMed Center, Gdańsk University of Technology, 80-233, Gdańsk, Poland
| | - Mohamed A Abdel-Rahman
- Department of Chemistry, Faculty of Science, Suez University, P.O. Box: 43221, Suez, Egypt.
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2
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Krishnapriya VU, Suresh CH. Imidazolin-2-imine and Imidazolin-2-methylidene Substitutions to Benzene, Pyridine, Phosphine, and N-Heterocyclic Carbene Predict Highly Electron-rich Ligands. Organometallics 2023. [DOI: 10.1021/acs.organomet.2c00666] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/29/2023]
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3
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NMR and theoretical analyses of electronic effects in N-BH3 adducts of (1,3,5-dithiazin-2-yl)silanes and stannanes. Intramolecular interactions of chemically identical S···S atoms. J Mol Struct 2022. [DOI: 10.1016/j.molstruc.2022.133938] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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4
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Lu J, Paci I, Leitch DC. A broadly applicable quantitative relative reactivity model for nucleophilic aromatic substitution (S NAr) using simple descriptors. Chem Sci 2022; 13:12681-12695. [PMID: 36519044 PMCID: PMC9645419 DOI: 10.1039/d2sc04041g] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/19/2022] [Accepted: 10/17/2022] [Indexed: 07/22/2023] Open
Abstract
We report a multivariate linear regression model able to make accurate predictions for the relative rate and regioselectivity of nucleophilic aromatic substitution (SNAr) reactions based on the electrophile structure. This model uses a diverse training/test set from experimentally-determined relative SNAr rates between benzyl alcohol and 74 unique electrophiles, including heterocycles with multiple substitution patterns. There is a robust linear relationship between the experimental SNAr free energies of activation and three molecular descriptors that can be obtained computationally: the electron affinity (EA) of the electrophile; the average molecular electrostatic potential (ESP) at the carbon undergoing substitution; and the sum of average ESP values for the ortho and para atoms relative to the reactive center. Despite using only simple descriptors calculated from ground state wavefunctions, this model demonstrates excellent correlation with previously measured SNAr reaction rates, and is able to accurately predict site selectivity for multihalogenated substrates: 91% prediction accuracy across 82 individual examples. The excellent agreement between predicted and experimental outcomes makes this easy-to-implement reactivity model a potentially powerful tool for synthetic planning.
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Affiliation(s)
- Jingru Lu
- Department of Chemistry, University of Victoria 3800 Finnerty Rd. Victoria BC CANADA V8P 5C2
| | - Irina Paci
- Department of Chemistry, University of Victoria 3800 Finnerty Rd. Victoria BC CANADA V8P 5C2
| | - David C Leitch
- Department of Chemistry, University of Victoria 3800 Finnerty Rd. Victoria BC CANADA V8P 5C2
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5
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Sundaram S, Vijayakumar V, Balasubramanian V. Electronic and structure conformational analysis (HOMO-LUMO, MEP, NBO, ELF, LOL, AIM) of hydrogen bond binary liquid crystal mixture: DFT/TD-DFT approach. COMPUT THEOR CHEM 2022. [DOI: 10.1016/j.comptc.2022.113920] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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6
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Shaimardanov AR, Shulga DA, Palyulin VA. Is an Inductive Effect Explicit Account Required for Atomic Charges Aimed at Use within the Force Fields? J Phys Chem A 2022; 126:6278-6294. [PMID: 36054931 DOI: 10.1021/acs.jpca.2c02722] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
Polarization and inductive effects are the concepts that have been widely used in qualitative and even quantitative descriptions of experimentally observed properties in chemistry. The polarization effect has proven to be important in cases of biomolecular modeling though still the vast majority of molecular simulations use the classical non-polarizable force fields. In the last few decades, a lot of effort has been put into promoting the polarization effect and incorporating it into modern force fields and charge calculation methods. In contrast, the inductive effect has not attracted such attention and is effectively absent in both classic and modern force fields. Thus, a question is whether this difference corresponds to the difference in the physical significance of the effects and their explicit account, or is an artifact that should be corrected in the next generation of force fields. The significance of the electronic effects is studied in this paper through the prism of performance of specific models for atomic charge calculation that take into explicit account a nested set of effects: the formal charge, the nearest neighbors, the inductive effect, and finally the model, which takes into account all effects, which are possible to account for using atomic charges. The specific choice for the methods is the following: formal charges, MMFF94 bond charge increments, Dynamic Electronegativity Relaxation (DENR), and RESP. We propose a special scheme for the separate estimation of each particular effect contribution. By pairwise comparing the residual molecular electrostatic potential (MEP) errors of those charge models (aimed at best reproducing the quantum chemical reference MEP), we sequentially revealed how the account of each effect contributes to the better-quality MEP reproduction. The following relative importance of effects was estimated; thus, the natural hierarchy of the effects was established. First, the account of formal charges is of primordial importance. Second, the nearest neighbors account is the next in significance. Third, the explicit account of inductive effect in empirical charge calculation schemes was shown to significantly─both qualitatively and quantitatively─improve the quality of MEP reproduction. Fourth, the contribution of polarization is indirectly assessed. Surprisingly, it is of the order of magnitude of the inductive effect even for the molecular systems, for which it is anticipated to be more significant. Finally, the relative importance of anisotropic effects in neutral molecules was additionally reviewed.
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Affiliation(s)
- Arslan R Shaimardanov
- Department of Chemistry, Lomonosov Moscow State University, Moscow 119991, Russian Federation
| | - Dmitry A Shulga
- Department of Chemistry, Lomonosov Moscow State University, Moscow 119991, Russian Federation
| | - Vladimir A Palyulin
- Department of Chemistry, Lomonosov Moscow State University, Moscow 119991, Russian Federation
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Suresh CH, Remya GS, Anjalikrishna PK. Molecular electrostatic potential analysis: A powerful tool to interpret and predict chemical reactivity. WIRES COMPUTATIONAL MOLECULAR SCIENCE 2022. [DOI: 10.1002/wcms.1601] [Citation(s) in RCA: 9] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
Affiliation(s)
- Cherumuttathu H. Suresh
- Chemical Sciences and Technology Division CSIR‐National Institute for Interdisciplinary Science and Technology Thiruvananthapuram Kerala India
- Academy of Scientific and Innovative Research (AcSIR) Ghaziabad India
| | - Geetha S. Remya
- Chemical Sciences and Technology Division CSIR‐National Institute for Interdisciplinary Science and Technology Thiruvananthapuram Kerala India
- Academy of Scientific and Innovative Research (AcSIR) Ghaziabad India
| | - Puthannur K. Anjalikrishna
- Chemical Sciences and Technology Division CSIR‐National Institute for Interdisciplinary Science and Technology Thiruvananthapuram Kerala India
- Academy of Scientific and Innovative Research (AcSIR) Ghaziabad India
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8
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Sayyed FB, Kolis SP, Xia H. Quantum Mechanical Methods for Thermal Hazard Risk Assessment in Early Phase Pharmaceutical Development. Org Process Res Dev 2022. [DOI: 10.1021/acs.oprd.1c00391] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Fareed Bhasha Sayyed
- Synthetic Molecule Design & Development, Eli Lilly Services India Pvt Ltd., Devarabeesanahalli, Bengaluru 560103, India
| | - Stanley P. Kolis
- Synthetic Molecule Design & Development, Eli Lilly and Company, Lilly Corporate Center, Indianapolis, Indiana 46285, United States
| | - Han Xia
- Synthetic Molecule Design & Development, Eli Lilly and Company, Lilly Corporate Center, Indianapolis, Indiana 46285, United States
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Lu J, Donnecke S, Paci I, Leitch DC. A reactivity model for oxidative addition to palladium enables quantitative predictions for catalytic cross-coupling reactions. Chem Sci 2022; 13:3477-3488. [PMID: 35432873 PMCID: PMC8943861 DOI: 10.1039/d2sc00174h] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/11/2022] [Accepted: 02/28/2022] [Indexed: 11/21/2022] Open
Abstract
Making accurate, quantitative predictions of chemical reactivity based on molecular structure is an unsolved problem in chemical synthesis, particularly for complex molecules. We report an approach to reactivity prediction for...
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Affiliation(s)
- Jingru Lu
- Department of Chemistry, University of Victoria 3800 Finnerty Rd Victoria BC V8P 5C2 Canada
| | - Sofia Donnecke
- Department of Chemistry, University of Victoria 3800 Finnerty Rd Victoria BC V8P 5C2 Canada
| | - Irina Paci
- Department of Chemistry, University of Victoria 3800 Finnerty Rd Victoria BC V8P 5C2 Canada
| | - David C Leitch
- Department of Chemistry, University of Victoria 3800 Finnerty Rd Victoria BC V8P 5C2 Canada
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10
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Electrostatic Potential Topology for Probing Molecular Structure, Bonding and Reactivity. Molecules 2021; 26:molecules26113289. [PMID: 34072507 PMCID: PMC8198923 DOI: 10.3390/molecules26113289] [Citation(s) in RCA: 52] [Impact Index Per Article: 17.3] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/10/2021] [Revised: 05/16/2021] [Accepted: 05/25/2021] [Indexed: 11/18/2022] Open
Abstract
Following the pioneering investigations of Bader on the topology of molecular electron density, the topology analysis of its sister field viz. molecular electrostatic potential (MESP) was taken up by the authors’ groups. Through these studies, MESP topology emerged as a powerful tool for exploring molecular bonding and reactivity patterns. The MESP topology features are mapped in terms of its critical points (CPs), such as bond critical points (BCPs), while the minima identify electron-rich locations, such as lone pairs and π-bonds. The gradient paths of MESP vividly bring out the atoms-in-molecule picture of neutral molecules and anions. The MESP-based characterization of a molecule in terms of electron-rich and -deficient regions provides a robust prediction about its interaction with other molecules. This leads to a clear picture of molecular aggregation, hydrogen bonding, lone pair–π interactions, π-conjugation, aromaticity and reaction mechanisms. This review summarizes the contributions of the authors’ groups over the last three decades and those of the other active groups towards understanding chemical bonding, molecular recognition, and reactivity through topology analysis of MESP.
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11
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Sessa F, Olsson M, Söderberg F, Wang F, Rahm M. Experimental Quantum Chemistry: A Hammett-inspired Fingerprinting of Substituent Effects. Chemphyschem 2021; 22:569-576. [PMID: 33502056 PMCID: PMC8049055 DOI: 10.1002/cphc.202001053] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/30/2020] [Revised: 01/27/2021] [Indexed: 01/20/2023]
Abstract
The quantum mechanically calculable Q descriptor is shown to be a potent quantifier of chemical reactivity in complex molecules - it shows a strong correlation to experimentally derived field effects in non-aromatic substrates and Hammett σm and σp parameters. Models for predicting substituent effects from Q are presented and applied, including on the elusive pentazolyl substituent. The presented approach enables fast computational estimation of substituent effects, and, in extension, medium-throughput screening of molecules and compound design. An experimental dataset is suggested as a candidate benchmark for aiding the general development and comparison of electronic structure analyses. It is here used to evaluate the experimental quantum chemistry (EQC) framework for chemical bonding analysis in larger molecules.
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Affiliation(s)
- Francesco Sessa
- Department of Chemistry and Chemical EngineeringChalmers University of TechnologySE-412 96GothenburgSweden
| | - Martina Olsson
- Department of Chemistry and Chemical EngineeringChalmers University of TechnologySE-412 96GothenburgSweden
| | - Fredrik Söderberg
- Department of Chemistry and Chemical EngineeringChalmers University of TechnologySE-412 96GothenburgSweden
| | - Fang Wang
- Department of ChemistryUniversity of Rhode Island140 Flagg RoadKingstonRhode Island02881USA
| | - Martin Rahm
- Department of Chemistry and Chemical EngineeringChalmers University of TechnologySE-412 96GothenburgSweden
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12
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Wang T, Zhou Y, Xu Y, Cheng GJ. Computational exploration of copper catalyzed vinylogous aerobic oxidation of unsaturated compounds. Sci Rep 2021; 11:1304. [PMID: 33446723 PMCID: PMC7809353 DOI: 10.1038/s41598-020-80188-2] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/11/2020] [Accepted: 12/09/2020] [Indexed: 11/23/2022] Open
Abstract
Selective oxidation is one of the most important and challenging transformations in both academic research and chemical industry. Recently, a highly selective and efficient way to synthesize biologically active γ-hydroxy-α,β-unsaturated molecules from Cu-catalyzed vinylogous aerobic oxidation of α,β- and β,γ-unsaturated compounds has been developed. However, the detailed reaction mechanism remains elusive. Herein, we report a density functional theory study on this Cu-catalyzed vinylogous aerobic oxidation of γ,γ-disubstituted α,β- and β,γ-unsaturated isomers. Our computational study unveils detailed mechanism for each elementary step, i.e. deprotonation, O2 activation, and reduction. Besides, the origin of regioselectivity, divergent reactivities of substrates as well as reducing agents, and the byproduct generation have also been investigated. Notably, the copper catalyst retains the + 2 oxidation state through the whole catalytic cycle and plays essential roles in multiple steps. These findings would provide hints on mechanistic studies and future development of transition metal-catalyzed aerobic oxidation reactions.
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Affiliation(s)
- Ting Wang
- Warshel Institute for Computational Biology, Shenzhen Key Laboratory of Steroid Drug Development, School of Life and Health Sciences, The Chinese University of Hong Kong (Shenzhen), Shenzhen, 518172, China
| | - Yu Zhou
- Warshel Institute for Computational Biology, Shenzhen Key Laboratory of Steroid Drug Development, School of Life and Health Sciences, The Chinese University of Hong Kong (Shenzhen), Shenzhen, 518172, China
- School of Life Sciences, University of Science and Technology of China, Hefei, 230027, Anhui, China
| | - Yao Xu
- Warshel Institute for Computational Biology, Shenzhen Key Laboratory of Steroid Drug Development, School of Life and Health Sciences, The Chinese University of Hong Kong (Shenzhen), Shenzhen, 518172, China
- School of Life Sciences, University of Science and Technology of China, Hefei, 230027, Anhui, China
| | - Gui-Juan Cheng
- Warshel Institute for Computational Biology, Shenzhen Key Laboratory of Steroid Drug Development, School of Life and Health Sciences, The Chinese University of Hong Kong (Shenzhen), Shenzhen, 518172, China.
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13
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Divya VV, Suresh CH. Tuning the donating strength of dye sensitizers using molecular electrostatic potential analysis. NEW J CHEM 2021. [DOI: 10.1039/d0nj04797j] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The significance of electron releasing groups at the donors of D–π–A systems for improving the donating strength and power conversion efficiency of photosensitizers.
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Affiliation(s)
- Velayudhan V. Divya
- Chemical Sciences and Technology Division
- CSIR-National Institute for Interdisciplinary Science and Technology
- Thiruvananthapuram
- India
- Academy of Scientific and Innovative Research (AcSIR)
| | - Cherumuttathu H. Suresh
- Chemical Sciences and Technology Division
- CSIR-National Institute for Interdisciplinary Science and Technology
- Thiruvananthapuram
- India
- Academy of Scientific and Innovative Research (AcSIR)
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14
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Ismail TM, Mohan N, Sajith PK. Theoretical study of hydrogen bonding interactions in substituted nitroxide radicals. NEW J CHEM 2021. [DOI: 10.1039/d0nj05362g] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Abstract
Interaction energy (Eint) of hydrogen bonded complexes of nitroxide radicals can be assessed in terms of the deepest minimum of molecular electrostatic potential (Vmin).
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Affiliation(s)
| | - Neetha Mohan
- Department of Chemistry
- Christopher Ingold Building
- University College London (UCL)
- London WC1H 0AJ
- UK
| | - P. K. Sajith
- Department of Chemistry
- Farook College
- Kozhikode
- India
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15
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Burns RJ, Mati IK, Muchowska KB, Adam C, Cockroft SL. Quantifying Through-Space Substituent Effects. Angew Chem Int Ed Engl 2020; 59:16717-16724. [PMID: 32542910 PMCID: PMC7540488 DOI: 10.1002/anie.202006943] [Citation(s) in RCA: 17] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/13/2020] [Indexed: 01/12/2023]
Abstract
The description of substituents as electron donating or withdrawing leads to a perceived dominance of through-bond influences. The situation is compounded by the challenge of separating through-bond and through-space contributions. Here, we probe the experimental significance of through-space substituent effects in molecular interactions and reaction kinetics. Conformational equilibrium constants were transposed onto the Hammett substituent constant scale revealing dominant through-space substituent effects that cannot be described in classic terms. For example, NO2 groups positioned over a biaryl bond exhibited similar influences as resonant electron donors. Meanwhile, the electro-enhancing influence of OMe/OH groups could be switched off or inverted by conformational twisting. 267 conformational equilibrium constants measured across eleven solvents were found to be better predictors of reaction kinetics than calculated electrostatic potentials, suggesting utility in other contexts and for benchmarking theoretical solvation models.
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Affiliation(s)
- Rebecca J. Burns
- EaStCHEM School of ChemistryUniversity of EdinburghJoseph Black BuildingDavid Brewster RoadEdinburghEH9 3FJUK
| | - Ioulia K. Mati
- EaStCHEM School of ChemistryUniversity of EdinburghJoseph Black BuildingDavid Brewster RoadEdinburghEH9 3FJUK
| | - Kamila B. Muchowska
- EaStCHEM School of ChemistryUniversity of EdinburghJoseph Black BuildingDavid Brewster RoadEdinburghEH9 3FJUK
| | - Catherine Adam
- EaStCHEM School of ChemistryUniversity of EdinburghJoseph Black BuildingDavid Brewster RoadEdinburghEH9 3FJUK
| | - Scott L. Cockroft
- EaStCHEM School of ChemistryUniversity of EdinburghJoseph Black BuildingDavid Brewster RoadEdinburghEH9 3FJUK
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16
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Jabłoński M, Krygowski TM. Changes in Electron Structure of the Triple Bond in Substituted Acetylene and Diacetylene Derivatives. Chemphyschem 2020; 21:1847-1857. [PMID: 32511830 DOI: 10.1002/cphc.202000378] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/05/2020] [Revised: 06/05/2020] [Indexed: 11/06/2022]
Abstract
The substituent effect is usually considered by means of various Hammett-like substituent constants and is most often related to aromatic systems. Unlike this, we present results of our research on the influence of 27 substituents spanning a wide range of electronic properties, from strongly electron-withdrawing to strongly electron-donating, on the electron structure of X-substituted acetylenes and diacetylenes - thus the systems which until now have practically not been subject of any deeper studies. It is shown that the interaction through triple bond(s) is associated with a significant advantage of resonance effects and that the substituent effect transmitted by the C≡C-C≡C unit is about half of that transmitted by the C≡C unit alone. Substituent X mainly affects the closest carbon atom by means of proximity effect, hence changes of charge on this atom do not follow any substituent constants. The effect on further carbon atoms is much smaller. The presence of the C≡C-C≡C unit withdraws more charge from X than a triple bond alone, and hinders communication between X and the terminal H atom. Comparison of substituent effects to those present in X-substituted benzene derivatives shows that the electronic properties of the terminal hydrogen atom in acetylenes and diacetylenes are most similar to the electronic properties of ortho and para hydrogen atoms in X-substituted benzene derivatives.
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Affiliation(s)
- Mirosław Jabłoński
- Faculty of Chemistry, Nicolaus Copernicus University in Toruń, Gagarina 7, 87-100, Toruń, Poland
| | - Tadeusz M Krygowski
- Department of Chemistry, Warsaw University, Pasteura 1, 02-093, Warsaw, Poland
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17
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Burns RJ, Mati IK, Muchowska KB, Adam C, Cockroft SL. Quantifying Through‐Space Substituent Effects. Angew Chem Int Ed Engl 2020. [DOI: 10.1002/ange.202006943] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Affiliation(s)
- Rebecca J. Burns
- EaStCHEM School of ChemistryUniversity of EdinburghJoseph Black Building David Brewster Road Edinburgh EH9 3FJ UK
| | - Ioulia K. Mati
- EaStCHEM School of ChemistryUniversity of EdinburghJoseph Black Building David Brewster Road Edinburgh EH9 3FJ UK
| | - Kamila B. Muchowska
- EaStCHEM School of ChemistryUniversity of EdinburghJoseph Black Building David Brewster Road Edinburgh EH9 3FJ UK
| | - Catherine Adam
- EaStCHEM School of ChemistryUniversity of EdinburghJoseph Black Building David Brewster Road Edinburgh EH9 3FJ UK
| | - Scott L. Cockroft
- EaStCHEM School of ChemistryUniversity of EdinburghJoseph Black Building David Brewster Road Edinburgh EH9 3FJ UK
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18
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Anjali BA, Suresh CH. Absorption and emission properties of 5-phenyl tris(8-hydroxyquinolinato) M(III) complexes (M = Al, Ga, In) and correlations with molecular electrostatic potential. J Comput Chem 2020; 41:1497-1508. [PMID: 32289191 DOI: 10.1002/jcc.26193] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/06/2020] [Accepted: 03/09/2020] [Indexed: 11/07/2022]
Abstract
Substituent effect for a series of 5-phenyl tris(8-hydroxyquinolinato) M(III) complexes (Mq3) of aluminum, gallium, and indium are investigated using density functional theory (DFT) for the ground state properties and the time-dependent version of DFT (TDDFT) for their absorption and emission properties. A comparison between the ground state energy of mer and fac isomers of all the complexes revealed that the mer configuration is always more stable than fac. The substituent effect is significantly reflected at the fluorescence maximum (λF ) values whereas the effect is moderate at the absorption maximum (λabs ) values. The molecular electrostatic potential (MESP) at the metal center (VM ) and the most electron rich region indicated by MESP minimum (Vmin ), located at the oxygen of phenoxide ring exhibit excellent correlations with the λF and Stokes shift (λF -λabs ) values. The study suggests the use of Stokes shift as an experimental quantity to measure the excited state substituent effect while the Vmin or VM emerge as theoretical quantities to measure the same.
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Affiliation(s)
- Bai A Anjali
- Chemical Sciences and Technology Division, CSIR-National Institute for Interdisciplinary Science and Technology, Trivandrum, India.,Academy of Scientific & Innovative Research (AcSIR), CSIR-NIIST Campus, Trivandrum, India
| | - Cherumuttathu H Suresh
- Chemical Sciences and Technology Division, CSIR-National Institute for Interdisciplinary Science and Technology, Trivandrum, India.,Academy of Scientific & Innovative Research (AcSIR), CSIR-NIIST Campus, Trivandrum, India
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K. Macedo G, Haiduke RLA. A Quantum Theory Atoms in Molecules Study about the Inductive Effect of Substituents in Methane Derivatives. ACS OMEGA 2020; 5:9041-9045. [PMID: 32337469 PMCID: PMC7178782 DOI: 10.1021/acsomega.0c01081] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 03/10/2020] [Accepted: 03/30/2020] [Indexed: 06/11/2023]
Abstract
The substituent effect on the covalent character of C-H bonds in methane derivatives is evaluated by means of local descriptors based on the topology of the electron density. Halogens, -OH, -SH, =O, =S, -NO2, -NH2, and -OCH3 increase the covalent character of the remaining C-H bonds, while alkaline metals (-Li and -Na) result in the opposite trend. This study proposes that the inductive effect is due to polarization changes driven by substituent charges.
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Chang CK, Lin ST. Improved Prediction of Phase Behaviors of Ionic Liquid Solutions with the Consideration of Directional Hydrogen Bonding Interactions. Ind Eng Chem Res 2020. [DOI: 10.1021/acs.iecr.9b03741] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Chun-Kai Chang
- Department of Chemical Engineering, National Taiwan University, Taipei 10617, Taiwan
| | - Shiang-Tai Lin
- Department of Chemical Engineering, National Taiwan University, Taipei 10617, Taiwan
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Divya VV, Suresh CH. Density functional theory study on the donating strength of donor systems in dye-sensitized solar cells. NEW J CHEM 2020. [DOI: 10.1039/d0nj00723d] [Citation(s) in RCA: 18] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Donating strength of typically used donors in dye-sensitized solar cells.
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Affiliation(s)
- Velayudhan V. Divya
- Chemical Sciences and Technology Division
- CSIR-National Institute for Interdisciplinary Science and Technology (CSIR-NIIST)
- Thiruvananthapuram
- India
- Academy of Scientific and Innovative Research (AcSIR)
| | - Cherumuttathu H. Suresh
- Chemical Sciences and Technology Division
- CSIR-National Institute for Interdisciplinary Science and Technology (CSIR-NIIST)
- Thiruvananthapuram
- India
- Academy of Scientific and Innovative Research (AcSIR)
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22
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23
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Divya VV, Sayyed FB, Suresh CH. Substituent Effect Transmission Power of Alkyl, Alkenyl, Alkynyl, Phenyl, Thiophenyl, and Polyacene Spacers. Chemphyschem 2019; 20:1752-1758. [PMID: 30973660 DOI: 10.1002/cphc.201900206] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/28/2019] [Indexed: 11/08/2022]
Abstract
The transmission of substituent effect through a variety of spacers, that is to say, alkyl, alkenyl, alkynyl, phenyl, thiophenyl, and polyacene has been studied by modeling Y-G-X type molecular systems (Y: reaction center; G: spacer moiety; X: substituent) using B3LYP/6-31G(d,p) density functional theory calculations. The reaction center is always kept as a C=C double bond and the molecular electrostatic potential (MESP) minimum (Vmin ) observed for this bond showed subtle variation with respect to the changes in the spacer unit and the nature of substituent. Strong linear correlations are observed between Hammett substituent constants (σI and σp ) and Vmin , which recommend the aptness of Vmin as an electronic descriptor to quantify the substituent effect. Since Vmin offers an alternative measure of substituent effect, the correlation between Vmin and σp has been used for assessing the transmission of substituent effect through a variety of spacer moieties. The highest transmission coefficient (γ) is always observed for smaller spacer length. Among all the spacers, alkenyl showed the highest and alkyl showed the lowest transmission power. The study recommends the use of short chains of C=C double, C≡C triple or a combination of both as spacers for the effective transmission of substituent effect to the reaction center.
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Affiliation(s)
- Velayudhan V Divya
- Chemical Sciences and Technology Division, CSIR - National Institute for Interdisciplinary Science and Technology Thiruvananthapuram, Kerala, 695 019, India.,Academy of Scientific and Innovative Research (AcSIR), Ghaziabad-, 201002, India
| | - Fareed Bhasha Sayyed
- Chemical Sciences and Technology Division, CSIR - National Institute for Interdisciplinary Science and Technology Thiruvananthapuram, Kerala, 695 019, India
| | - Cherumuttathu H Suresh
- Chemical Sciences and Technology Division, CSIR - National Institute for Interdisciplinary Science and Technology Thiruvananthapuram, Kerala, 695 019, India.,Academy of Scientific and Innovative Research (AcSIR), Ghaziabad-, 201002, India
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24
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Chang CK, Chen WL, Wu DT, Lin ST. Improved Directional Hydrogen Bonding Interactions for the Prediction of Activity Coefficients with COSMO-SAC. Ind Eng Chem Res 2018. [DOI: 10.1021/acs.iecr.8b02493] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Chun-Kai Chang
- Department of Chemical Engineering, National Taiwan University, Taipei City 10617, Taiwan
| | - Wei-Lin Chen
- Department of Chemical Engineering, National Taiwan University, Taipei City 10617, Taiwan
| | - David T. Wu
- Departments of Chemistry and of Chemical and Biological Engineering, Colorado School of Mines, Golden, Colorado 80401, United States
| | - Shiang-Tai Lin
- Department of Chemical Engineering, National Taiwan University, Taipei City 10617, Taiwan
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25
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Remya GS, Suresh CH. Quantification and classification of substituent effects in organic chemistry: a theoretical molecular electrostatic potential study. Phys Chem Chem Phys 2018; 18:20615-26. [PMID: 27412764 DOI: 10.1039/c6cp02936a] [Citation(s) in RCA: 72] [Impact Index Per Article: 12.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/02/2023]
Abstract
Substituent effects in organic chemistry are generally described in terms of experimentally derived Hammett parameters whereas a convenient theoretical tool to study these effects in π-conjugated molecular systems is molecular electrostatic potential (MESP) analysis. The present study shows that the difference between MESP at the nucleus of the para carbon of substituted benzene and a carbon atom in benzene, designated as ΔVC, is very useful to quantify and classify substituent effects. On the basis of positive and negative ΔVC values, a broad classification of around 381 substituents into electron withdrawing and donating categories is made. Each category is again sorted based on the magnitude of ΔVC into subcategories such as very strong, strong, medium, and weak electron donating/withdrawing. Furthermore, the data are used to show the transferability and additivity of substituent effects in π-conjugated organic molecules such as condensed aromatic, olefinic, acetylenic, and heterocyclic systems. The transferability properties hold good for ΔVC in all these molecular systems. The additive properties of substituent effects are strongly reflected on ΔVC and the predictive power of the data to assign the total substituent effects of multi-substituted systems is verified. The ΔVC data and the present classification of substituents are very useful to design π-conjugated organic molecular systems with desired electron rich/poor character.
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Affiliation(s)
- Geetha S Remya
- Chemical Sciences and Technology Division, CSIR-National Institute for Interdisciplinary Science and Technology, Thiruvananthapuram, 695 019, India.
| | - Cherumuttathu H Suresh
- Chemical Sciences and Technology Division, CSIR-National Institute for Interdisciplinary Science and Technology, Thiruvananthapuram, 695 019, India.
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26
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Anjali BA, Suresh CH. Electronic effect of ligands vs. reduction potentials of Fischer carbene complexes of chromium: a molecular electrostatic potential analysis. NEW J CHEM 2018. [DOI: 10.1039/c8nj04184a] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Molecular electrostatic potential at the chromium centre (VCr) emerges as a powerful predictor of reduction potential (E0).
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Affiliation(s)
- Bai Amutha Anjali
- Chemical Sciences and Technology Division
- CSIR-National Institute for Interdisciplinary Science and Technology
- Trivandrum 695019
- India
- Academy of Scientific & Innovative Research (AcSIR)
| | - Cherumuttathu H. Suresh
- Chemical Sciences and Technology Division
- CSIR-National Institute for Interdisciplinary Science and Technology
- Trivandrum 695019
- India
- Academy of Scientific & Innovative Research (AcSIR)
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27
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Szatylowicz H, Jezuita A, Siodła T, Varaksin KS, Domanski MA, Ejsmont K, Krygowski TM. Toward the Physical Interpretation of Inductive and Resonance Substituent Effects and Reexamination Based on Quantum Chemical Modeling. ACS OMEGA 2017; 2:7163-7171. [PMID: 31457295 PMCID: PMC6645133 DOI: 10.1021/acsomega.7b01043] [Citation(s) in RCA: 29] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/21/2017] [Accepted: 10/12/2017] [Indexed: 05/12/2023]
Abstract
An application of a charge of the substituent active region concept to 1-Y,4-X-disubstituted derivatives of bicyclo[2.2.2]octane (BCO) [where Y = NO2, COOH, OH, and NH2 and X = NMe2, NH2, OH, OMe, Me, H, F, Cl, CF3, CN, CHO, COMe, CONH2, COOH, NO2, and NO] provides a quantitative information on the inductive component of the substituent effect (SE). It is shown that the effect is highly additive but dependent on the kind of substituents. An application of the SE stabilization energy characteristics to 1,4-disubstituted derivatives of BCO and benzene allows the definition of inductive and resonance contributions to the overall SE. Good agreements with empirical approaches are found. All calculations have been carried out by means of the B3LYP/6-311++G(d,p) method.
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Affiliation(s)
- Halina Szatylowicz
- Faculty
of Chemistry, Warsaw University of Technology, Noakowskiego 3, 00-664 Warsaw, Poland
- E-mail: (H.S.)
| | - Anna Jezuita
- Faculty
of Chemistry, Opole University, Oleska 48, 45-052 Opole, Poland
| | - Tomasz Siodła
- Faculty
of Chemistry, Adam Mickiewicz University, Umultowska 89b, 61-614 Poznań, Poland
| | - Konstantin S. Varaksin
- Department
Organic Chemistry, Omsk F.M. Dostoevsky
State University, Mira
55A, 644077 Omsk, Russia
| | - Mateusz A. Domanski
- Faculty
of Chemistry, Warsaw University of Technology, Noakowskiego 3, 00-664 Warsaw, Poland
| | - Krzysztof Ejsmont
- Faculty
of Chemistry, Opole University, Oleska 48, 45-052 Opole, Poland
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28
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Vijayalakshmi KP, Suresh CH. Ammonia Borane Clusters: Energetics of Dihydrogen Bonding, Cooperativity, and the Role of Electrostatics. J Phys Chem A 2017; 121:2704-2714. [DOI: 10.1021/acs.jpca.7b01527] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Kunduchi P. Vijayalakshmi
- Analytical and Spectroscopy
Division, Analytical, Spectroscopy and Ceramics Group, Propellants,
Polymers, Chemicals and Materials Entity, Vikram Sarabhai Space Centre, Thiruvananthapuram- 695022, India
| | - Cherumuttathu H. Suresh
- Chemical Sciences and Technology Division, CSIR- National Institute for Interdisciplinary Science and Technology, Thiruvananthapuram, 695 019, India
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29
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Jiajun D, Maza JR, Xu Y, Xu T, Momen R, Kirk SR, Jenkins S. A stress tensor and QTAIM perspective on the substituent effects of biphenyl subjected to torsion. J Comput Chem 2016; 37:2508-17. [PMID: 27546220 DOI: 10.1002/jcc.24476] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/13/2016] [Revised: 06/26/2016] [Accepted: 08/06/2016] [Indexed: 11/11/2022]
Abstract
The Quantum Theory of Atoms in Molecules (QTAIM) defines quantities in 3D space that can be easily obtained from routine quantum chemical calculations. The present investigation shows that local properties can be related quantitatively to measures traditionally connected to experimental data, such as Hammett constants. We consider the specific case of substituted biphenyl to quantify the effects of a torsion φ, 0.0° ≤ φ ≤ 180.0°, of the C-C bond linking the two phenyl rings for C12 H9 -x, where x = N(CH3 )2 , NH2 , CH3 , CHO, CN, NO2, on the entire molecule. QTAIM interpreted Hammett constants, aΔH(rb ) are introduced and constructed using the difference between the H(rb ) value of C12 H9 -x and the C12 H9 -H, biphenyl which is the reference molecule, with a constant of proportionality a. This investigation unexpectedly yields very good or good agreement for the x groups with the Hammett para-, meta-, and ortho-substituent constants and is checked against para-substituted benzene. We then proceed to present the interpreted substituent constants of seven new biphenyl substituent groups, where tabulated Hammett substituent constant values are not available; y = SiH3 , ZnCl, COOCH3 , SO2 NH2 , SO2 OH, COCl, CB3 . Consistency is found for the QTAIM interpreted biphenyl substituent constants of the seven new groups y independently using the stress tensor polarizability Pσ . In addition, a selection of future applications is discussed that highlight the usefulness of this approach. © 2016 Wiley Periodicals, Inc.
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Affiliation(s)
- D Jiajun
- Key Laboratory of Chemical Biology and Traditional Chinese Medicine Research and Key Laboratory of Resource Fine-Processing and Advanced Materials of Hunan Province of MOE, College of Chemistry and Chemical Engineering, Hunan Normal University, Changsha Hunan, 410081, China
| | - J R Maza
- Key Laboratory of Chemical Biology and Traditional Chinese Medicine Research and Key Laboratory of Resource Fine-Processing and Advanced Materials of Hunan Province of MOE, College of Chemistry and Chemical Engineering, Hunan Normal University, Changsha Hunan, 410081, China
| | - Y Xu
- Key Laboratory of Chemical Biology and Traditional Chinese Medicine Research and Key Laboratory of Resource Fine-Processing and Advanced Materials of Hunan Province of MOE, College of Chemistry and Chemical Engineering, Hunan Normal University, Changsha Hunan, 410081, China
| | - T Xu
- Key Laboratory of Chemical Biology and Traditional Chinese Medicine Research and Key Laboratory of Resource Fine-Processing and Advanced Materials of Hunan Province of MOE, College of Chemistry and Chemical Engineering, Hunan Normal University, Changsha Hunan, 410081, China
| | - R Momen
- Key Laboratory of Chemical Biology and Traditional Chinese Medicine Research and Key Laboratory of Resource Fine-Processing and Advanced Materials of Hunan Province of MOE, College of Chemistry and Chemical Engineering, Hunan Normal University, Changsha Hunan, 410081, China
| | - S R Kirk
- Key Laboratory of Chemical Biology and Traditional Chinese Medicine Research and Key Laboratory of Resource Fine-Processing and Advanced Materials of Hunan Province of MOE, College of Chemistry and Chemical Engineering, Hunan Normal University, Changsha Hunan, 410081, China
| | - S Jenkins
- Key Laboratory of Chemical Biology and Traditional Chinese Medicine Research and Key Laboratory of Resource Fine-Processing and Advanced Materials of Hunan Province of MOE, College of Chemistry and Chemical Engineering, Hunan Normal University, Changsha Hunan, 410081, China
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30
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Anjali BA, Sayyed FB, Suresh CH. Correlation and Prediction of Redox Potentials of Hydrogen Evolution Mononuclear Cobalt Catalysts via Molecular Electrostatic Potential: A DFT Study. J Phys Chem A 2016; 120:1112-9. [DOI: 10.1021/acs.jpca.5b11543] [Citation(s) in RCA: 41] [Impact Index Per Article: 5.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Bai Amutha Anjali
- Chemical Sciences and Technology Division and ‡Academy of Scientific & Innovative Research (AcSIR), CSIR-National Institute for Interdisciplinary Science and Technology, Trivandrum 695019, India
| | - Fareed Bhasha Sayyed
- Chemical Sciences and Technology Division and ‡Academy of Scientific & Innovative Research (AcSIR), CSIR-National Institute for Interdisciplinary Science and Technology, Trivandrum 695019, India
| | - Cherumuttathu H. Suresh
- Chemical Sciences and Technology Division and ‡Academy of Scientific & Innovative Research (AcSIR), CSIR-National Institute for Interdisciplinary Science and Technology, Trivandrum 695019, India
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31
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Sandhya KS, Remya GS, Suresh CH. Pincer Ligand Modifications To Tune the Activation Barrier for H2 Elimination in Water Splitting Milstein Catalyst. Inorg Chem 2015; 54:11150-6. [PMID: 26575086 DOI: 10.1021/acs.inorgchem.5b01471] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Modifications on the ligand environment of Milstein ruthenium(II) pincer hydride catalysts have been proposed to fine-tune the activation free energy, ΔG(⧧) for the key step of H2 elimination in the water splitting reaction. This study conducted at the B3LYP level of density functional theory including the solvation effect reveals that changing the bulky t-butyl group at the P-arm of the pincer ligand by methyl or ethyl group can reduce the ΔG(⧧) by a substantial margin, ∼ 10 kcal/mol. The reduction in the steric effect of the pincer ligand causes exothermic association of the water molecule to the metal center and leads to significant stabilization of all the subsequent reaction intermediates and the transition state compared to those of the original Milstein catalyst that promotes endothermic association of the water molecule. Though electron donating groups on the pyridyl unit of the pincer ligand are advantageous for reducing the activation barrier in the gas phase, the effect is only 1-1.4 kcal/mol compared to that of an electron withdrawing group. The absolute minimum of the electrostatic potential at the hydride ligand and carbonyl stretching frequency of the catalyst are useful parameters to gauge the effect of ligand environment on the H2 elimination step of the water splitting reaction.
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Affiliation(s)
- Karakkadparambil S Sandhya
- Inorganic and Theoretical Chemistry Section, Chemical Sciences and Technology Division, National Institute for Interdisciplinary Science and Technology , Trivandrum 695 019, India
| | - Geetha S Remya
- Inorganic and Theoretical Chemistry Section, Chemical Sciences and Technology Division, National Institute for Interdisciplinary Science and Technology , Trivandrum 695 019, India
| | - Cherumuttathu H Suresh
- Inorganic and Theoretical Chemistry Section, Chemical Sciences and Technology Division, National Institute for Interdisciplinary Science and Technology , Trivandrum 695 019, India
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32
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Gadre SR, Kumar A. Understanding Lone Pair-π Interactions from Electrostatic Viewpoint. CHALLENGES AND ADVANCES IN COMPUTATIONAL CHEMISTRY AND PHYSICS 2015. [DOI: 10.1007/978-3-319-14163-3_13] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
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33
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Chernyshev VM, Vlasova AG, Astakhov AV, Shishkina SV, Shishkin OV. Reactivity of C-Amino-1,2,4-triazoles toward Electrophiles: A Combined Computational and Experimental Study of Alkylation by Halogen Alkanes. J Org Chem 2014; 80:375-85. [DOI: 10.1021/jo502405q] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/22/2023]
Affiliation(s)
- Victor M. Chernyshev
- Platov South-Russian State Polytechnic University (NPI), Prosveschenya 132, 346428 Novocherkassk, Russian Federation
| | - Anna G. Vlasova
- Platov South-Russian State Polytechnic University (NPI), Prosveschenya 132, 346428 Novocherkassk, Russian Federation
| | - Alexander V. Astakhov
- Platov South-Russian State Polytechnic University (NPI), Prosveschenya 132, 346428 Novocherkassk, Russian Federation
| | - Svitlana V. Shishkina
- State Scientific Institution “Institute for Single Crystals” of National Academy of Sciences of Ukraine, Lenin Ave. 60, 61001 Kharkiv, Ukraine
| | - Oleg V. Shishkin
- State Scientific Institution “Institute for Single Crystals” of National Academy of Sciences of Ukraine, Lenin Ave. 60, 61001 Kharkiv, Ukraine
- V. N. Karazin Kharkiv National University, 4 Svobody sq., Kharkiv 61202, Ukraine
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34
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Mishra BK, Deshmukh MM, Venkatnarayan R. C-H···π interactions and the nature of the donor carbon atom. J Org Chem 2014; 79:8599-606. [PMID: 25157745 DOI: 10.1021/jo501251s] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
The influence of multiple substituents (F, CH3, NO2, CN, Cl, OH and NH2) on the C-H···π interaction in benzene-ethylene complex was investigated using the estimated CCSD(T) method and complete basis set limit. The results were compared with our earlier reported complexes of benzene-acetylene and benzene-methane, thus completing the sp, sp(2) and sp(3) series of C-H donors. The stabilization energy values for multiple fluoro-substituted benzene-ethylene complexes are found to be very close to those of the multiple fluoro-substituted benzene-methane complexes. Expectedly, the stabilization energies for the multiple methyl-substituted benzene-ethylene complexes lie between those of the multiple methyl-substituted benzene-methane and benzene-acetylene complexes. Energy decomposition analysis using the DFT-SAPT method predicts the dispersion energy to be dominant, similar to the benzene-methane complexes. For the symmetrically disubstituted complexes (-OH, -Cl, -NH2, -CN and -NO2), additional C-H···X interaction was observed, possibly due to the angular orientation of the ethylene molecule. Multidimensional correlation analysis between the electrostatic, dispersion and exchange-repulsion with the C-H···π interaction distance (r), Hammett constant (σ) and the molar refractivity (MR) revealed strong correlation between dispersion energy and the C-H···π interaction distance (r) as well as molar refractivity (MR).
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Affiliation(s)
- Brijesh Kumar Mishra
- International Institute of Information Technology Bangalore , Bangalore 560100, Karnataka, India
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35
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Mohan N, Suresh CH, Kumar A, Gadre SR. Molecular electrostatics for probing lone pair-π interactions. Phys Chem Chem Phys 2014; 15:18401-9. [PMID: 24085157 DOI: 10.1039/c3cp53379d] [Citation(s) in RCA: 77] [Impact Index Per Article: 7.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/05/2023]
Abstract
An electrostatics-based approach has been proposed for probing the weak interactions between lone pair containing molecules and π deficient molecular systems. For electron-rich molecules, the negative minima in molecular electrostatic potential (MESP) topography give the location of electron localization and the MESP value at the minimum (Vmin) quantifies the electron-rich character of that region. Interactive behavior of a lone pair bearing molecule with electron deficient π-systems, such as hexafluorobenzene, 1,3,5-trinitrobenzene, 2,4,6-trifluoro-1,3,5-triazine and 1,2,4,5-tetracyanobenzene explored within DFT brings out good correlation of the lone pair-π interaction energy (E(int)) with the Vmin value of the electron-rich system. Such interaction is found to be portrayed well with the Electrostatic Potential for Intermolecular Complexation (EPIC) model. On the basis of the precise location of MESP minimum, a prediction for the orientation of a lone pair bearing molecule with an electron deficient π-system is possible in the majority of the cases studied.
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Affiliation(s)
- Neetha Mohan
- Chemical Sciences and Technology Division, CSIR-National Institute for Interdisciplinary Science and Technology, Trivandrum, 695019, India.
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Abstract
We carried out first principles calculations to show that polymerizable structures containing hydroxyl (alcoholic chain) and amino groups are suitable to form stable complexes with dibenzothiophene (DBT) and its alkyl derivates. These sulfur pollutants are very difficult to eliminate through traditional catalytic processes. Spontaneous and exothermic interactions at 0 K primarily occur through the formation of stable complexes of organosulfur molecules with monomeric structures by hydrogen bonds. The bonds are formed between the sulfur atom and the hydrogen of the hydroxyl group; additional hydrogen bonds are formed between the hydrogen atoms of the organosulfur molecule and the nitrogen atoms of the monomers. We vary the number of methylene groups in the alcoholic chain containing the hydroxyl group of the monomer and find that the monomeric structure with four methylene groups has the best selectivity towards the interaction with the methyl derivates with reference to the interaction with DBT. Even this study does not consider solvent and competitive adsorption effects; our results show that monomeric structures containing amino and hydroxyl groups can be used to develop adsorbents to eliminate organosulfur pollutants from oil and its derivates.
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Joshi BD, Srivastava A, Gupta V, Tandon P, Jain S. Spectroscopic and quantum chemical study of an alkaloid aristolochic acid I. SPECTROCHIMICA ACTA. PART A, MOLECULAR AND BIOMOLECULAR SPECTROSCOPY 2013; 116:258-269. [PMID: 23954541 DOI: 10.1016/j.saa.2013.07.036] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/04/2013] [Revised: 07/10/2013] [Accepted: 07/21/2013] [Indexed: 06/02/2023]
Abstract
Aristolochic acids (AAs) (Aristolochiaceae) are used in the traditional Chinese herb medicine. We have presented the geometry optimization, electrostatic potential surface, frontier orbital energy gap and vibrational wavenumbers of aristolochic acid I (AA I) using ab initio Hartree-Fock (HF) and density functional theory (DFT/B3LYP) method employing 6-311G(d,p) basis set. A complete vibrational assignment has been done on the basis of calculations on monomer and dimer of AA I. The UV-vis absorption spectrum has been recorded in ethanol solvent and compared with the calculated one in the gas phase as well as in solvent environment (integral-equation formalism polarizable continuum model; IEF-PCM) using TD-DFT/6-31G basis set. A short outline of the NBO analysis segment with their structural meaning has been presented. The variation of thermodynamic properties with temperature was calculated theoretically and the thermal response of the compound has been recorded with the help of differential scanning calorimetry (DSC) in N2 environment.
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Affiliation(s)
- Bhawani Datt Joshi
- Department of Physics, University of Lucknow, Lucknow 226007, India; Department of Physics, Siddhanath Sc. Campus, Tribhuvan University, Nepal
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38
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Sajith PK, Suresh CH. Trans and Cis Influences in Hypervalent Iodine(III) Complexes: A DFT Study. Inorg Chem 2013; 52:6046-54. [DOI: 10.1021/ic400399v] [Citation(s) in RCA: 35] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/09/2023]
Affiliation(s)
- P. K. Sajith
- Chemical Sciences and Technology
Division, CSIR-National Institute for Interdisciplinary Science and Technology, Trivandrum, India 695 019
| | - Cherumuttathu H. Suresh
- Chemical Sciences and Technology
Division, CSIR-National Institute for Interdisciplinary Science and Technology, Trivandrum, India 695 019
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39
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Alkorta I, Sánchez-Sanz G, Elguero J. Linear free energy relationships in halogen bonds. CrystEngComm 2013. [DOI: 10.1039/c2ce26786a] [Citation(s) in RCA: 27] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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40
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Mohajeri A, Baresh I, Alipour M. Prediction and characterization of halogen–hydride interaction in Cu n H n ···ClC2Z and Cu n H···ClC2Z complexes (n = 2–5; Z = H, F, CH3). Struct Chem 2012. [DOI: 10.1007/s11224-012-0081-4] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
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41
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Sayyed FB, Suresh CH. Accurate prediction of cation-π interaction energy using substituent effects. J Phys Chem A 2012; 116:5723-32. [PMID: 22616763 DOI: 10.1021/jp3034193] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Substituent effects on cation-π interactions have been quantified using a variety of Φ-X···M(+) complexes where Φ, X, and M(+) are the π-system, substituent, and cation, respectively. The cation-π interaction energy, E(M(+)), showed a strong linear correlation with the molecular electrostatic potential (MESP) based measure of the substituent effect, ΔV(min) (the difference between the MESP minimum (V(min)) on the π-region of a substituted system and the corresponding unsubstituted system). This linear relationship is E(M(+)) = C(M(+))(ΔV(min)) + E(M(+))' where C(M(+)) is the reaction constant and E(M(+))' is the cation-π interaction energy of the unsubstituted complex. This relationship is similar to the Hammett equation and its first term yields the substituent contribution of the cation-π interaction energy. Further, a linear correlation between C(M(+))() and E(M(+))()' has been established, which facilitates the prediction of C(M(+)) for unknown cations. Thus, a prediction of E(M(+)) for any Φ-X···M(+) complex is achieved by knowing the values of E(M(+))' and ΔV(min). The generality of the equation is tested for a variety of cations (Li(+), Na(+), K(+), Mg(+), BeCl(+), MgCl(+), CaCl(+), TiCl(3)(+), CrCl(2)(+), NiCl(+), Cu(+), ZnCl(+), NH(4)(+), CH(3)NH(3)(+), N(CH(3))(4)(+), C(NH(2))(3)(+)), substituents (N(CH(3))(2), NH(2), OCH(3), CH(3), OH, H, SCH(3), SH, CCH, F, Cl, COOH, CHO, CF(3), CN, NO(2)), and a large number of π-systems. The tested systems also include multiple substituted π-systems, viz. ethylene, acetylene, hexa-1,3,5-triene, benzene, naphthalene, indole, pyrrole, phenylalanine, tryptophan, tyrosine, azulene, pyrene, [6]-cyclacene, and corannulene and found that E(M)(+) follows the additivity of substituent effects. Further, the substituent effects on cationic sandwich complexes of the type C(6)H(6)···M(+)···C(6)H(5)X have been assessed and found that E(M(+)) can be predicted with 97.7% accuracy using the values of E(M(+))' and ΔV(min). All the Φ-X···M(+) systems showed good agreement between the calculated and predicted E(M(+))() values, suggesting that the ΔV(min) approach to substituent effect is accurate and useful for predicting the interactive behavior of substituted π-systems with cations.
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Affiliation(s)
- Fareed Bhasha Sayyed
- Chemical Sciences and Technology Division, National Institute for Interdisciplinary Science and Technology (CSIR), Trivandrum, India 695019
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Alipour M, Mohajeri A. From density functional steric analysis and molecular electrostatic potential to the estimation of etherification rate constant. J PHYS ORG CHEM 2012. [DOI: 10.1002/poc.2921] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
- Mojtaba Alipour
- Department of Chemistry, College of Sciences; Shiraz University; Shiraz; 71454; Iran
| | - Afshan Mohajeri
- Department of Chemistry, College of Sciences; Shiraz University; Shiraz; 71454; Iran
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Sajith PK, Suresh CH. Quantification of the Trans Influence in Hypervalent Iodine Complexes. Inorg Chem 2011; 51:967-77. [DOI: 10.1021/ic202047g] [Citation(s) in RCA: 65] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/20/2023]
Affiliation(s)
- P. K. Sajith
- Computational Modeling and Simulation Section, National Institute for Interdisciplinary Science and Technology (CSIR), Trivandrum, India 695 019
| | - Cherumuttathu H. Suresh
- Computational Modeling and Simulation Section, National Institute for Interdisciplinary Science and Technology (CSIR), Trivandrum, India 695 019
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Smith AP, McKercher AE, Mawhinney RC. Inductive Effect: A Quantum Theory of Atoms in Molecules Perspective. J Phys Chem A 2011; 115:12544-54. [DOI: 10.1021/jp202757p] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Ashlyn P. Smith
- Department of Chemistry, Lakehead University, 955 Oliver Road, Thunder Bay, Ontario P7B 5E1, Canada
| | - Adrienne E. McKercher
- Department of Chemistry, Lakehead University, 955 Oliver Road, Thunder Bay, Ontario P7B 5E1, Canada
| | - Robert C. Mawhinney
- Department of Chemistry, Lakehead University, 955 Oliver Road, Thunder Bay, Ontario P7B 5E1, Canada
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Sayyed FB, Suresh CH. Quantitative assessment of substituent effects on cation-π interactions using molecular electrostatic potential topography. J Phys Chem A 2011; 115:9300-7. [PMID: 21774520 DOI: 10.1021/jp205064y] [Citation(s) in RCA: 38] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
A molecular electrostatic potential (MESP) topography based approach has been proposed to quantify the substituent effects on cation-π interactions in complexes of mono-, di-, tri-, and hexasubstituted benzenes with Li(+), Na(+), K(+), and NH(4)(+). The MESP minimum (V(min)) on the π-region of C(6)H(5)X showed strong linear dependency to the cation-π interaction energy, E(M(+)). Further, cation-π distance correlated well with V(min)-π distance. The difference between V(min) of C(6)H(5)X and C(6)H(6) (ΔV(min)) is proposed as a good parameter to quantify the substituent effect on cation-π interaction. Compared to benzene, electron-donating groups stabilize the di-, tri-, and hexasubstituted cation-π complexes while electron-withdrawing groups destabilize them. In multiple substituted complexes, E(M(+)) is almost equal (∼95%) to the sum of the individual substituent contributions (E(M(+)) ≈ Σ(ΔE(M(+)))), suggesting that substituent effect on cation-π interactions is largely additive. The ΔV(min) of C(6)H(5)X systems and additivity feature have been used to make predictions on the interaction energies of 80 multiple substituted cation-π complexes with above 97% accuracy. The average mean absolute deviation of the V(min)-predicted interaction energy, E(M(+))(V) from the calculated E(M(+)) is -0.18 kcal/mol for Li(+), -0.09 kcal/mol for Na(+), -0.43 kcal/mol for K(+), and -0.67 kcal/mol for NH(4)(+), which emphasize the predictive power of V(min) as well as the additive feature of the substituent effect.
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Affiliation(s)
- Fareed Bhasha Sayyed
- Computational Modeling and Simulation Section, National Institute for Interdisciplinary Science and Technology (CSIR), Trivandrum, India 695019
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Sajith PK, Suresh CH. Mechanisms of Reductive Eliminations in Square Planar Pd(II) Complexes: Nature of Eliminated Bonds and Role of trans Influence. Inorg Chem 2011; 50:8085-93. [DOI: 10.1021/ic2004563] [Citation(s) in RCA: 46] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Affiliation(s)
- P. K. Sajith
- Computational Modeling and Simulation Section, National Institute for Interdisciplinary Science and Technology (CSIR), Trivandrum, India 695 019
| | - Cherumuttathu H. Suresh
- Computational Modeling and Simulation Section, National Institute for Interdisciplinary Science and Technology (CSIR), Trivandrum, India 695 019
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Sayyed FB, Suresh CH. Substituent Effects in Cation−π Interactions: A Unified View from Inductive, Resonance, and Through-Space Effects. J Phys Chem A 2011; 115:5660-4. [DOI: 10.1021/jp202441x] [Citation(s) in RCA: 25] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Fareed Bhasha Sayyed
- Computational Modeling and Simulation Section, National Institute for Interdisciplinary Science and Technology (CSIR), Trivandrum 695019, India
| | - Cherumuttathu H. Suresh
- Computational Modeling and Simulation Section, National Institute for Interdisciplinary Science and Technology (CSIR), Trivandrum 695019, India
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Pingale SS. Molecular electrostatic potential for exploring π-conjugation: a density-functional investigation. Phys Chem Chem Phys 2011; 13:15158-65. [PMID: 21779585 DOI: 10.1039/c1cp20071b] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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Towards physical interpretation of Hammett constants: charge transferred between active regions of substituents and a functional group. Struct Chem 2010. [DOI: 10.1007/s11224-010-9676-9] [Citation(s) in RCA: 55] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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Sayyed FB, Suresh CH, Gadre SR. Appraisal of through-bond and through-space substituent effects via molecular electrostatic potential topography. J Phys Chem A 2010; 114:12330-3. [PMID: 21043490 DOI: 10.1021/jp107689z] [Citation(s) in RCA: 33] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Through-bond (TB) and through-space (TS) substituent effects in substituted alkyl, alkenyl, and alkynyl arenes are quantified separately using molecular electrostatic potential (MESP) topographical analysis. The deepest MESP point over the aromatic ring (V(min)) is considered as a probe for monitoring these effects for a variety of substituents. In the case of substituted alkyl chains, the TS effect (79.6%) clearly dominates the TB effect, whereas in the unsaturated analogues the TB effect (∼55%) overrides the TS effect.
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Affiliation(s)
- Fareed Bhasha Sayyed
- Computational Modeling and Simulation Section, National Institute for Interdisciplinary Science and Technology (CSIR), Trivandrum 695019, India
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