1
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Ennehary S, Toufik H, Bouzzine SM, Lazrak M, Lamchouri F. Theoretical investigation for dye-sensitized solar cells: effect of donor variation on the optoelectronic properties and charge transfer parameters. RESEARCH ON CHEMICAL INTERMEDIATES 2023. [DOI: 10.1007/s11164-023-04971-2] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/15/2023]
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2
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Sedzro DM, Idris MO, Durojaye OA, Yekeen AA, Fadahunsi AA, Alakanse SO. Identifying Potential p53‐MDM2 Interaction Antagonists: An Integrated Approach of Pharmacophore‐Based Virtual Screening, Interaction Fingerprinting, MD Simulation and DFT Studies. ChemistrySelect 2022. [DOI: 10.1002/slct.202202380] [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)
- Divine Mensah Sedzro
- MOE Key Laboratory of Membraneless Organelle and Cellular Dynamics Hefei National Laboratory for Physical Sciences at the Microscale University of Science and Technology of China Hefei Anhui 230027 China
- School of Life Sciences University of Science and Technology of China Hefei Anhui 230027 China
| | - Mukhtar Oluwaseun Idris
- School of Life Sciences University of Science and Technology of China Hefei Anhui 230027 China
| | - Olanrewaju Ayodeji Durojaye
- MOE Key Laboratory of Membraneless Organelle and Cellular Dynamics Hefei National Laboratory for Physical Sciences at the Microscale University of Science and Technology of China Hefei Anhui 230027 China
- School of Life Sciences University of Science and Technology of China Hefei Anhui 230027 China
- Department of Chemical Sciences Coal City University, Emene Enugu State Nigeria
- ACAII BIOHEALTH LTD, Ikotun Lagos State Nigeria
| | - Abeeb Abiodun Yekeen
- School of Life Sciences University of Science and Technology of China Hefei Anhui 230027 China
| | - Adeola Abraham Fadahunsi
- Graduate School of Biomedical Engineering (GSBSE) University of Maine Orono ME 04469 USA
- Department of Oncology the First Affiliated Hospital of USTC Division of Life Sciences and Medicine University of Science and Technology of China Hefei Anhui 230027 China
- School of Information Science and Technology University of Science and Technology of China Hefei Anhui 230027 China
| | - Suleiman Oluwaseun Alakanse
- School of Life Sciences University of Science and Technology of China Hefei Anhui 230027 China
- Department of Biochemistry Faculty of Life Sciences University of Ilorin Ilorin Kwara State Nigeria
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3
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Yusuf T, Oladipo SD, Zamisa S, Kumalo HM, Lawal IA, Lawal MM, Mabuba N. Design of New Schiff-Base Copper(II) Complexes: Synthesis, Crystal Structures, DFT Study, and Binding Potency toward Cytochrome P450 3A4. ACS OMEGA 2021; 6:13704-13718. [PMID: 34095663 PMCID: PMC8173565 DOI: 10.1021/acsomega.1c00906] [Citation(s) in RCA: 38] [Impact Index Per Article: 12.7] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/19/2021] [Accepted: 04/07/2021] [Indexed: 06/01/2023]
Abstract
We report the synthesis and crystal structures of three new copper(II) Schiff-base complexes. The complexes have been characterized by elemental analysis and Fourier transform infrared (FT-IR) and UV-visible spectroscopies. The X-ray diffraction (XRD) analysis reveals that complexes 1 and 3 crystallize in a monoclinic space group C2/c and 2 in a triclinic space group P1̅, each adopting a square planar geometry around the metal center. We use a density functional theory method to explore the quantum chemical properties of these complexes. The calculation proceeds with the three-dimensional (3D) crystal structure characterization of the complexes in which the calculated IR and UV-vis values are comparable to the experimental results. Charge distribution and molecular orbital analyses enabled quantum chemical property prediction of these complexes. We study the drug-likeness properties and binding potentials of the synthesized complexes. The in silico outcome showed that they could serve as permeability-glycoprotein (P-gp) and different cytochrome P450 substrates. Our calculations showed that the complexes significantly bind to cytochrome P450 3A4.
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Affiliation(s)
- Tunde
L. Yusuf
- Department
of Chemical Sciences, University of Johannesburg, Doornfontein, P.O.
Box 17011, Johannesburg 2028, South Africa
| | - Segun D. Oladipo
- Department
of Chemical Sciences, Olabisi Onabanjo University, P. M. B., 2002 Ago-Iwoye, Nigeria
| | - Sizwe Zamisa
- School
of Chemistry and Physics, University of
KwaZulu-Natal, Private Bag X54001, Durban 4000, South Africa
| | - Hezekiel M. Kumalo
- Discipline
of Medical Biochemistry, School of Laboratory Medicine and Medical
Sciences, University of KwaZulu-Natal, Private Bag X54001, Durban 4000, South
Africa
| | - Isiaka A. Lawal
- Chemistry
Department, Faculty of Applied and Computer Science, Vaal University of Technology, Vanderbijlpark Campus, Boulevard, 1900 Vanderbijlpark, South Africa
| | - Monsurat M. Lawal
- Discipline
of Medical Biochemistry, School of Laboratory Medicine and Medical
Sciences, University of KwaZulu-Natal, Private Bag X54001, Durban 4000, South
Africa
| | - Nonhlangabezo Mabuba
- Department
of Chemical Sciences, University of Johannesburg, Doornfontein, P.O.
Box 17011, Johannesburg 2028, South Africa
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4
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Abstract
The chemical reactivity of a molecule as a whole or of an atom in a molecule varies during a chemical reaction. A variation of global and local reactivity descriptors in the course of a physicochemical process was studied within a quantum fluid density functional theory framework. Effects of a physical confinement and the electronic excitation therein were studied. In this Perspective, we also highlight the direction of a spontaneous chemical reaction in the light of the dynamical variants of the conceptual density functional theory-based electronic structure principles. An exhaustive state-of-the-art dynamical study is warranted in order to understand a chemical reaction from a reactivity perspective augmenting the associated molecular reaction dynamics analysis.
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Affiliation(s)
- Utpal Sarkar
- Department of Physics, Assam University, Silchar 788011, India
| | - Pratim Kumar Chattaraj
- Department of Chemistry, Indian Institute of Technology, Kharagpur 721302, India.,Department of Chemistry, Indian Institute of Technology, Bombay, Powai, Mumbai 400076, India
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Adeowo FY, Ejalonibu MA, Elrashedy AA, Lawal MM, Kumalo HM. Multi-target approach for Alzheimer's disease treatment: computational biomolecular modeling of cholinesterase enzymes with a novel 4- N-phenylaminoquinoline derivative reveal promising potentials. J Biomol Struct Dyn 2020; 39:3825-3841. [PMID: 33030113 DOI: 10.1080/07391102.2020.1826129] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
Abstract
The identification of dual inhibitors targeting the active sites of the cholinesterase enzymes, acetylcholinesterase (AChE) and butyrylcholinesterase (BuChE), have lately surfaced as a multi-approach towards Alzheimer treatment. More recently, a novel series of 4-N-phenylaminoquinolines was synthesized and evaluated against AChE and BuChE in which one of the compounds displayed appreciable inhibition compared to the standard compound, galantamine. To provide a clearer picture of the inhibition mechanism of this potent compound at the molecular level, computational biomolecular modeling was carried out. The investigation was initiated with the exploration of the chemical properties of the identified compound 11 b and reference drug, galantamine. Density functional theory (DFT) calculations reveal some conceptual parameters that provide information on the stability and reactivity of the compounds as potential inhibitors. To unveil the binding mechanism, energetics and enzyme-ligand interactions, molecular dynamics (MD) simulations of six different systems were executed over a period. Calculated binding free energy values are in the same order with experimental IC50 data. Identification of the main residues driving optimum binding of the active compound 11 b to the binding region of both AChE and BuChE showed Trp81 and Trp110 as the most important, respectively. It was proposed that the studied compound could serve as a dual inhibitor for AChE and BuChE, therefore, would potentially be a promising moiety in a multi-target approach for the treatment of Alzheimer's disorder.Communicated by Ramaswamy H. Sarma.
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Affiliation(s)
- Fatima Y Adeowo
- Drug Research and Innovation Unit, Discipline of Medical Biochemistry, School of Laboratory Medicine and Medical Science, University of KwaZulu-Natal, Durban, South Africa
| | - Murtala A Ejalonibu
- Drug Research and Innovation Unit, Discipline of Medical Biochemistry, School of Laboratory Medicine and Medical Science, University of KwaZulu-Natal, Durban, South Africa
| | - Ahmed A Elrashedy
- Molecular Bio-computational and Drug Design Research Group, School of Health Sciences, University of KwaZulu-Natal, Durban, South Africa
| | - Monsurat M Lawal
- Drug Research and Innovation Unit, Discipline of Medical Biochemistry, School of Laboratory Medicine and Medical Science, University of KwaZulu-Natal, Durban, South Africa
| | - Hezekiel M Kumalo
- Drug Research and Innovation Unit, Discipline of Medical Biochemistry, School of Laboratory Medicine and Medical Science, University of KwaZulu-Natal, Durban, South Africa
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Martins‐Costa MTC, Ruiz‐López MF. Isoprene Reactivity on Water Surfaces from ab initio QM/MM Molecular Dynamics Simulations. Chemphyschem 2020; 21:2263-2271. [DOI: 10.1002/cphc.202000652] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/26/2020] [Revised: 08/17/2020] [Indexed: 11/07/2022]
Affiliation(s)
- Marilia T. C. Martins‐Costa
- Laboratoire de Physique et Chimie Théoriques UMR CNRS 7019 University of Lorraine CNRS BP 70239 54506 Vandoeuvre-lès-Nancy France
| | - Manuel F. Ruiz‐López
- Laboratoire de Physique et Chimie Théoriques UMR CNRS 7019 University of Lorraine CNRS BP 70239 54506 Vandoeuvre-lès-Nancy France
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Ferjani H, Bechaieb R, El-Fattah WA, Fettouhi M. Broad-band luminescence involving fluconazole antifungal drug in a lead-free bismuth iodide perovskite: Combined experimental and computational insights. SPECTROCHIMICA ACTA. PART A, MOLECULAR AND BIOMOLECULAR SPECTROSCOPY 2020; 237:118354. [PMID: 32380432 DOI: 10.1016/j.saa.2020.118354] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/04/2020] [Revised: 04/03/2020] [Accepted: 04/07/2020] [Indexed: 06/11/2023]
Abstract
The synthesis and characterization of a lead-free perovskite-type material, (C13H14N6F2O)2 Bi2I10 is reported. It exhibits a zero-dimensional (0D) Bi2I104- octahedral unit, surrounded by a flexible tripodal antifungal ligand (H2Fluconazole)2+. The several intermolecular interactions of the independent cation and the bismuth iodide octahedra were tested via the Hirshfeld surface analysis. The detailed interpretation of the vibrational modes was carried out. The band gap (Eg) of 2.10 eV agrees with the theoretical values. Upon photoexcitation, the crystals exhibit a broadband green emission peaked at 534 nm, which originates from electronic transitions within the inorganic cluster [Bi2I10]4-. The theoretical calculations were carried out using DFT and TD-DFT methods to appraise the molecular geometry, vibrational spectra, electronic absorption spectra, frontier molecular orbitals (FOMs) and global reactivity descriptors. Calculations reveal that the energy gap (Eg) and other chemical reactivity descriptors are primarily linked to the inorganic anion and the triazolium rings (A and B) of the organic cation reflecting their importance in the activity and the antioxidant ability of the molecule.
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Affiliation(s)
- Hela Ferjani
- Chemistry Department, College of Science, IMSIU (Imam Mohammad Ibn Saud Islamic University), Riyadh 11623, Saudi Arabia.
| | - Rim Bechaieb
- Selective Organic & Heterocyclic Synthesis-Biological Activity Evaluation, Département de chimie, Faculté des sciences de Tunis, Université de Tunis El Manar, 2092 Tunis, Tunisia; Sorbonne Universités, UPMC Univ Paris 06, UMR 7616, Laboratoire de Chimie Théorique, F-75005 Paris, France
| | - Wesam Abd El-Fattah
- Chemistry Department, College of Science, IMSIU (Imam Mohammad Ibn Saud Islamic University), Riyadh 11623, Saudi Arabia; Chemistry Department, Faculty of Science, Portsaid University, Port-said, Egypt
| | - Mohammed Fettouhi
- Department of Chemistry, King Fahd University of Petroleum and Minerals, Dhahran, 31261, Saudi Arabia
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9
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Lawal IA, Lawal MM, Akpotu SO, Okoro HK, Klink M, Ndungu P. Noncovalent Graphene Oxide Functionalized with Ionic Liquid: Theoretical, Isotherm, Kinetics, and Regeneration Studies on the Adsorption of Pharmaceuticals. Ind Eng Chem Res 2020. [DOI: 10.1021/acs.iecr.9b06634] [Citation(s) in RCA: 22] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Affiliation(s)
- Isiaka A. Lawal
- Chemistry Department, Faculty of Applied and Computer Science, Vaal University of Technology, Vanderbijlpark Campus Boulevard, 1900 Vanderbijlpark, South Africa
| | - Monsurat M. Lawal
- School of Laboratory Medicine and Medical Sciences, University of KwaZulu-Natal, Durban 4001, South Africa
| | - Samson O. Akpotu
- Chemistry Department, Faculty of Applied and Computer Science, Vaal University of Technology, Vanderbijlpark Campus Boulevard, 1900 Vanderbijlpark, South Africa
| | - Hussein Kehinde Okoro
- Analytical-Environmental and Material Science Research Group, Department of Industrial Chemistry, Faculty of Physical Sciences, Faculty of Physical Sciences, P.M.B 1515, Ilorin 234000, Nigeria
| | - Michael Klink
- Chemistry Department, Faculty of Applied and Computer Science, Vaal University of Technology, Vanderbijlpark Campus Boulevard, 1900 Vanderbijlpark, South Africa
| | - Patrick Ndungu
- Energy, Sensors, and Multifunctional Nanomaterials Research Group, Department of Applied Chemistry, University of Johannesburg, Doornfontein, 2028 Johannesburg, South Africa
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Oller J, Saez DA, Vöhringer-Martinez E. Atom-Condensed Fukui Function in Condensed Phases and Biological Systems and Its Application to Enzymatic Fixation of Carbon Dioxide. J Phys Chem A 2020; 124:849-857. [PMID: 31951411 DOI: 10.1021/acs.jpca.9b07012] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
Local reactivity descriptors such as atom-condensed Fukui functions are promising computational tools to study chemical reactivity at specific sites within a molecule. Their applications have been mainly focused on isolated molecules in their most stable conformation without considering the effects of the surroundings. Here we propose to combine quantum mechanics/molecular mechanics Born-Oppenheimer molecular dynamics simulations to obtain the microstates (configurations) of a molecular system using different representations of the molecular environment and calculate Boltzmann-weighted atom-condensed local reactivity descriptors based on conceptual density functional theory. Our approach takes the conformational fluctuations of the molecular system and the polarization of its electron density by the environment into account, allowing us to analyze the effect of the molecular environment on reactivity. In this contribution, we apply the method mentioned above to the catalytic fixation of carbon dioxide by crotonyl-CoA carboxylase/reductase and study if the enzyme alters the reactivity of its substrate compared with an aqueous solution. Our main result is that the protein environment activates the substrate by the elimination of solute-solvent hydrogen bonds from aqueous solution in the two elementary steps of the reaction mechanism: the nucleophilic attack of a hydride anion from NADPH on the α,β-unsaturated thioester and the electrophilic attack of carbon dioxide on the formed enolate species.
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Affiliation(s)
- Javier Oller
- Departamento de Fı́sico-Quı́mica, Facultad de Ciencias Quı́micas , Universidad de Concepción , Concepción 4070386 , Chile
| | - David Adrian Saez
- Departamento de Fı́sico-Quı́mica, Facultad de Ciencias Quı́micas , Universidad de Concepción , Concepción 4070386 , Chile
| | - Esteban Vöhringer-Martinez
- Departamento de Fı́sico-Quı́mica, Facultad de Ciencias Quı́micas , Universidad de Concepción , Concepción 4070386 , Chile
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11
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Computational modelling and characterisation of phosphole adopted in triphenyl amine photosensitisers for solar cell applications. RESULTS IN CHEMISTRY 2020. [DOI: 10.1016/j.rechem.2020.100069] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
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12
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Umar Ndagi, Lawal MM, Soliman ME. DFT Study of the Structural and Electronic Properties of Selected Organogold(III) Compounds with Characteristic Anticancer Activity. RUSSIAN JOURNAL OF PHYSICAL CHEMISTRY A 2019. [DOI: 10.1134/s0036024419080302] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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13
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14
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Das A. Experimental and Theoretical Studies on Molecular Structures, Nanostructural Features, and Photophysical Properties of 5-Amino-1-Alkylimidazole-4-Carboxamide Compounds. J STRUCT CHEM+ 2019. [DOI: 10.1134/s0022476619060143] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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15
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Danish M, Raza MA, Anwar U, Rashid U, Ahmed Z. Differential functional theory and molecular docking studies of newly synthesized carbamates. J CHIN CHEM SOC-TAIP 2019. [DOI: 10.1002/jccs.201800068] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Affiliation(s)
- Muhammad Danish
- Department of Chemistry, Hafiz Hayat CampusUniversity of Gujrat Gujrat Pakistan
| | - Muhammad A. Raza
- Department of Chemistry, Hafiz Hayat CampusUniversity of Gujrat Gujrat Pakistan
| | - Uzma Anwar
- Department of Chemistry, Hafiz Hayat CampusUniversity of Gujrat Gujrat Pakistan
| | - Umer Rashid
- Department of ChemistryCOMSATS University Islamabad Islamabad Pakistan
| | - Zaheer Ahmed
- RCMSNational University of Science and Technology Islamabad Pakistan
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16
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Facile route for green synthesis of N-benzylideneaniline over bimetallic reduced graphene oxide: chemical reactivity of 2,3,4-substituted derivatives of aniline. RESEARCH ON CHEMICAL INTERMEDIATES 2019. [DOI: 10.1007/s11164-019-03772-w] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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17
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Arora M, Jassal AK, Pandey SK, Chawla SK, Mudsainiyan RK. Anion-controlled geometrically different Cu(II) ion-based coordination polymers and green synthetic route for copper nanoparticles: a combined experimental and computational insight. J COORD CHEM 2018. [DOI: 10.1080/00958972.2018.1483077] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/14/2022]
Affiliation(s)
- Meenu Arora
- Department of Applied Chemistry, Maharaj Ranjit Singh Punjab Technical University, Bathinda, India
| | | | | | - Sukhvinder Kaur Chawla
- Department of Chemistry, Centre of Advanced Studies-II, Guru Nanak Dev University, Amritsar, India
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18
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Mudsainiyan RK, Pandey SK. A Combined Theoretical Calculation and Hirshfeld Surface Analysis of Cooperative Non-covalent Interactions in the Crystal Packing in [Cu(L1)2
(EDA)]. Z Anorg Allg Chem 2017. [DOI: 10.1002/zaac.201700182] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
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19
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Anzline C, Israel S, Niranjana Devi R, Sheeba RAJR, Richard Rajkumar P. High Resolution Synchrotron Diffraction Study on Charge Density Distribution of Ampicillin Trihydrate. CHINESE J CHEM PHYS 2017. [DOI: 10.1063/1674-0068/30/cjcp1607143] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
Affiliation(s)
- C. Anzline
- Mother Teresa Women's University, Kodaikanal 624102, Tamil Nadu, India
| | - S. Israel
- Research and Postgraduate Department of Physics, The American college, Madurai 625002, Tamil Nadu, India
| | - R. Niranjana Devi
- Research and Postgraduate Department of Physics, The American college, Madurai 625002, Tamil Nadu, India
| | - R. A. J. R. Sheeba
- Research and Postgraduate Department of Physics, Madura College, Madurai 625001, Tamil Nadu, India
| | - P. Richard Rajkumar
- Research and Postgraduate Department of Physics, The American college, Madurai 625002, Tamil Nadu, India
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Gosav S, Paduraru N, Maftei D, Birsa ML, Praisler M. Quantum chemical study of a derivative of 3-substituted dithiocarbamic flavanone. SPECTROCHIMICA ACTA. PART A, MOLECULAR AND BIOMOLECULAR SPECTROSCOPY 2017; 172:115-125. [PMID: 27116950 DOI: 10.1016/j.saa.2016.04.024] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/31/2015] [Revised: 03/22/2016] [Accepted: 04/08/2016] [Indexed: 06/05/2023]
Abstract
The aim of this work is to characterize a quite novel 3-dithiocarbamic flavonoid by vibrational spectroscopy in conjunction with Density Functional Theory (DFT) calculations. Quantum mechanics calculations of energies, geometries and vibrational wavenumbers in the ground state were carried out by using hybrid functional B3LYP with 6-311G(d,p) as basis set. The results indicate a remarkable agreement between the calculated molecular geometries, as well as vibrational frequencies, and the corresponding experimental data. In addition, a complete assignment of all the absorption bands present in the vibrational spectrum has been performed. In order to assess its chemical potential, quantum molecular descriptors characterizing the interactions between the 3-dithiocarbamic flavonoid and its biological receptors have been computed. The frontier molecular orbitals and the HOMO-LUMO energy gap have been used in order to explain the way in which the new molecule can interact with other species and to characterize its molecular chemical stability/reactivity. The molecular electrostatic potential (MEP) map, computed in order to identify the sites of the studied flavonoid that are most likely to interact with electrophilic and nucleophilic species, is discussed.
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Affiliation(s)
- Steluta Gosav
- "Dunarea de Jos" University, Department of Chemistry, Physics and Environment, Domneasca St. 47, 800008 Galati, Romania
| | - Nicoleta Paduraru
- "Dunarea de Jos" University, Department of Chemistry, Physics and Environment, Domneasca St. 47, 800008 Galati, Romania.
| | - Dan Maftei
- "Al.I. Cuza" University, Chemistry Department, 11 Carol I Blvd., RO-700506 Iasi, Romania
| | - Mihail Lucian Birsa
- "Al.I. Cuza" University, Chemistry Department, 11 Carol I Blvd., RO-700506 Iasi, Romania
| | - Mirela Praisler
- "Dunarea de Jos" University, Department of Chemistry, Physics and Environment, Domneasca St. 47, 800008 Galati, Romania
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21
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Laib S, Ouddai N. Intra-ring haptotropic rearrangements of Mn(CO)3 in fluorenyl ligands. JOURNAL OF SAUDI CHEMICAL SOCIETY 2017. [DOI: 10.1016/j.jscs.2015.05.005] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
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22
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Arkan F, Izadyar M. Quantum chemical aspects of solvent effects on the Diels–Alder reaction of 2,3-dimethyl-1,3-butadiene and diethyl azodicarboxylate. PROGRESS IN REACTION KINETICS AND MECHANISM 2016. [DOI: 10.3184/146867816x14702227410256] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
Abstract
A comprehensive theoretical study was performed regarding the solvent effect on the Diels–Alder reaction of 2,3-dimethyl-1,3-butadiene and the hetero-dienophile, diethyl azodicarboxylate. Reaction rates in the various solutions were studied using SCRF–DFT theory and good agreement with the experimental results was obtained. According to natural bond orbital analysis, it was confirmed that the stabilisation energy of the C–N bonds contributes to the strong interaction between the solvents and transition state (TS) structures. Topological analyses showed a linear correlation between the interaction energy and the sum of electron density at the bond critical point of C–N at the TS. Moreover, with an increase in the overall electron density of the C–N bond critical point, the vibrational frequencies were decreased. Finally, some correlations between the quantum reactivity indices and the rate constants in the presence of 23 solvents were investigated.
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Affiliation(s)
- Foroogh Arkan
- Department of Chemistry, Ferdowsi University of Mashhad, International Campus, Mashhad, Iran
| | - Mohammad Izadyar
- Department of Chemistry, Faculty of Sciences, Ferdowsi University of Mashhad, Mashhad, Iran
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23
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Georgieva MK, Duarte FJS, Santos AG. Directed electrostatic activation in enantioselective organocatalytic cyclopropanation reactions: a computational study. Org Biomol Chem 2016; 14:5965-82. [PMID: 27223461 DOI: 10.1039/c6ob00748a] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/05/2023]
Abstract
Cyclopropane rings are versatile building blocks in organic chemistry. Their synthesis, by the reaction of sulfur ylides with α,β-unsaturated carbonyl compounds, has recently aroused renewed interest after the discovery of efficient catalysis by using (S)-indoline-2-carboxylic acid. In order to rationalize the behavior of this catalyst, MacMillan proposed a directed electrostatic activation (DEA) mechanism, in which the negative carboxylate group interacts with the positive thionium moiety, thus reducing the activation energy and increasing the reaction rate. More recently, Mayr refuted some of MacMillan conclusions, but accepted the DEA mechanism as a justification for the experimental high reaction rates. In contrast, our results indicate that the selectivity obtained in the process seems to result from several strong hydrogen bond interactions between the two reacting species, while no strong evidence for a DEA mechanism was found. We also concluded that the hydrogen bonds don't improve the reaction rate by lowering the activation energy of the rate-determining step, but can do it by promoting efficient reaction trajectories due to long-range complexation of the reagents. Finally, our results confirm that the cyclopropanation reaction occurs by a two-step mechanism, and that the overall enantioselectivity depends on the relative energies of the two steps, averaged by the relative populations of the iminium intermediates that are initially formed in the reaction.
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Affiliation(s)
- Miglena K Georgieva
- LAQV-REQUIMTE, Department of Chemistry, Faculty of Science and Technology, Universidade NOVA de Lisboa, 2829-516 Caparica, Portugal.
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24
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Lemmouchi M, Hannachi D, Ouddai N. Comparative study of the lanthanide (Ln) and actinide (An) triflate complexes M(OTf) n. J STRUCT CHEM+ 2016. [DOI: 10.1134/s0022476615080065] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
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25
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Murugavel S, Madhanraj R, Prasanna Kumar DKA, Nagarajan S, Ponnuswamy A. Experimental and Theoretical Studies of 4-(1-benzyl-5-methyl-1H-1,2,3-triazol-4-yl)-6-(2,4-dichlorophenyl)pyrimidin-2-amine: A Potential Antibacterial Agent. J CHIN CHEM SOC-TAIP 2015. [DOI: 10.1002/jccs.201500010] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
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26
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27
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Saleem F, Rao GK, Kumar S, Singh MP, Singh AK. Complexes of (η6-benzene)ruthenium(ii) with 1,4-bis(phenylthio/seleno-methyl)-1,2,3-triazoles: synthesis, structure and applications in catalytic activation of oxidation and transfer hydrogenation. Dalton Trans 2015; 44:19141-52. [DOI: 10.1039/c5dt02926k] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
1,4-Bis(phenylthio/seleno methyl)-1,2,3-triazoles (L1–L4) synthesized by a ‘Click’ reaction form complexes [(η6-C6H6)RuClL]PF6 (L = L1–L4) suitable as catalyst for oxidation/transfer hydrogenation.
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Affiliation(s)
- Fariha Saleem
- Department of Chemistry
- Indian Institute of Technology Delhi
- New Delhi 110016
- India
| | - Gyandshwar K. Rao
- Department of Chemistry
- Indian Institute of Technology Delhi
- New Delhi 110016
- India
| | - Satyendra Kumar
- Department of Chemistry
- Indian Institute of Technology Delhi
- New Delhi 110016
- India
| | - Mahabir Pratap Singh
- Department of Chemistry
- Indian Institute of Technology Delhi
- New Delhi 110016
- India
| | - Ajai K. Singh
- Department of Chemistry
- Indian Institute of Technology Delhi
- New Delhi 110016
- India
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28
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Martins-Costa MTC, García-Prieto FF, Ruiz-López MF. Reactivity of aldehydes at the air–water interface. Insights from molecular dynamics simulations and ab initio calculations. Org Biomol Chem 2015; 13:1673-9. [DOI: 10.1039/c4ob02029d] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Computer simulations show that solvation effects at the air–water interface significantly influence the chemistry of aldehydes, enhancing for instance the benzaldehyde photolysis rate constant by one order of magnitude.
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29
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Umadevi V, Santhanamoorthi N, Senthilkumar L. Understanding molecular properties of halogenated cyclohexane – A DFT study. COMPUT THEOR CHEM 2014. [DOI: 10.1016/j.comptc.2014.09.019] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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30
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Prakash O, Joshi H, Sharma KN, Gupta PL, Singh AK. Transfer Hydrogenation (pH Independent) of Ketones and Aldehydes in Water with Glycerol: Ru, Rh, and Ir Catalysts with a COOH Group near the Metal on a (Phenylthio)methyl-2-pyridine Scaffold. Organometallics 2014. [DOI: 10.1021/om500515z] [Citation(s) in RCA: 42] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/17/2023]
Affiliation(s)
- Om Prakash
- Department of Chemistry, Indian Institute of Technology Delhi, New Delhi 110016, India
| | - Hemant Joshi
- Department of Chemistry, Indian Institute of Technology Delhi, New Delhi 110016, India
| | - Kamal Nayan Sharma
- Department of Chemistry, Indian Institute of Technology Delhi, New Delhi 110016, India
| | - Pancham Lal Gupta
- Department of Chemistry, Indian Institute of Technology Delhi, New Delhi 110016, India
| | - Ajai K. Singh
- Department of Chemistry, Indian Institute of Technology Delhi, New Delhi 110016, India
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31
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Sharma AK, Joshi H, Sharma KN, Gupta PL, Singh AK. 2-Propanol vs Glycerol as Hydrogen Source in Catalytic Activation of Transfer Hydrogenation with (η6-Benzene)ruthenium(II) Complexes of Unsymmetrical Bidentate Chalcogen Ligands. Organometallics 2014. [DOI: 10.1021/om500579r] [Citation(s) in RCA: 50] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/18/2023]
Affiliation(s)
- Alpesh K. Sharma
- Department of Chemistry, Indian Institute of Technology Delhi, New Delhi − 110016, India
| | - Hemant Joshi
- Department of Chemistry, Indian Institute of Technology Delhi, New Delhi − 110016, India
| | - Kamal Nayan Sharma
- Department of Chemistry, Indian Institute of Technology Delhi, New Delhi − 110016, India
| | - Pancham L. Gupta
- Department of Chemistry, Indian Institute of Technology Delhi, New Delhi − 110016, India
| | - Ajai K. Singh
- Department of Chemistry, Indian Institute of Technology Delhi, New Delhi − 110016, India
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32
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Prakash O, Sharma KN, Joshi H, Gupta PL, Singh AK. Half-Sandwich Rhodium/Iridium(III) Complexes Designed with Cp* and 1,2-Bis(phenylchalcogenomethyl)benzene as Catalysts for Transfer Hydrogenation in Glycerol. Organometallics 2014. [DOI: 10.1021/om500149n] [Citation(s) in RCA: 36] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Om Prakash
- Department of Chemistry, Indian Institute of Technology Delhi, New Delhi 110016, India
| | - Kamal Nayan Sharma
- Department of Chemistry, Indian Institute of Technology Delhi, New Delhi 110016, India
| | - Hemant Joshi
- Department of Chemistry, Indian Institute of Technology Delhi, New Delhi 110016, India
| | - Pancham L. Gupta
- Department of Chemistry, Indian Institute of Technology Delhi, New Delhi 110016, India
| | - Ajai K. Singh
- Department of Chemistry, Indian Institute of Technology Delhi, New Delhi 110016, India
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33
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Saleem F, Rao GK, Kumar A, Mukherjee G, Singh AK. Catalyst Activation with Cp*RhIII/IrIII–1,2,3-Triazole-Based Organochalcogen Ligand Complexes: Transfer Hydrogenation via Loss of Cp* and N-Methylmorpholine N-Oxide Based vs Oppenauer-Type Oxidation. Organometallics 2014. [DOI: 10.1021/om500266p] [Citation(s) in RCA: 35] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/16/2023]
Affiliation(s)
- Fariha Saleem
- Department
of Chemistry, Indian Institute of Technology Delhi, New Delhi 110016, India
| | - Gyandshwar Kumar Rao
- Department
of Chemistry, Indian Institute of Technology Delhi, New Delhi 110016, India
| | - Arun Kumar
- Department
of Chemistry, Indian Institute of Technology Delhi, New Delhi 110016, India
| | - Goutam Mukherjee
- Department
of Chemistry, Indian Institute of Technology Delhi, New Delhi 110016, India
| | - Ajai K. Singh
- Department
of Chemistry, Indian Institute of Technology Delhi, New Delhi 110016, India
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34
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Prakash O, Sharma KN, Joshi H, Gupta PL, Singh AK. (η5-Cp*)Rh(III)/Ir(III) Complexes with Bis(chalcogenoethers) (E, E′ Ligands: E = S/Se; E′ = S/Se): Synthesis, Structure, and Applications in Catalytic Oppenauer-Type Oxidation and Transfer Hydrogenation. Organometallics 2014. [DOI: 10.1021/om401150s] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Affiliation(s)
- Om Prakash
- Department
of Chemistry, Indian Institute of Technology Delhi, New Delhi 110016, India
| | - Kamal Nayan Sharma
- Department
of Chemistry, Indian Institute of Technology Delhi, New Delhi 110016, India
| | - Hemant Joshi
- Department
of Chemistry, Indian Institute of Technology Delhi, New Delhi 110016, India
| | - Pancham L. Gupta
- Department
of Chemistry, Indian Institute of Technology Delhi, New Delhi 110016, India
| | - Ajai K. Singh
- Department
of Chemistry, Indian Institute of Technology Delhi, New Delhi 110016, India
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35
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Zhang DD, Chen XK, Liu HL, Huang XR. A computational mechanistic study of pH-dependent alcohol dehydrogenation catalyzed by a novel [C,N] or [C,C] cyclometalated Cp*Ir complex in aqueous solution. NEW J CHEM 2014. [DOI: 10.1039/c4nj00441h] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
Abstract
Our results have elucidated the impressive performance of a catalyst in alcohol dehydrogenation in aqueous solution by tuning the pH value.
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Affiliation(s)
- Dan-Dan Zhang
- State Key Laboratory of Theoretical and Computational Chemistry
- Institute of Theoretical Chemistry
- Jilin University
- Changchun, China
| | - Xian-Kai Chen
- State Key Laboratory of Theoretical and Computational Chemistry
- Institute of Theoretical Chemistry
- Jilin University
- Changchun, China
| | - Hui-Ling Liu
- State Key Laboratory of Theoretical and Computational Chemistry
- Institute of Theoretical Chemistry
- Jilin University
- Changchun, China
| | - Xu-Ri Huang
- State Key Laboratory of Theoretical and Computational Chemistry
- Institute of Theoretical Chemistry
- Jilin University
- Changchun, China
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36
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Bouabdallah I, Rahal M, Harit T, El Hajbi A, Malek F, Eddike D, Tillard M, Ramdani A. Hartree–Fock and density functional theory studies on tautomerism of 5,5′-diisopropyl-3,3′-bipyrazole in gas phase and solution. Chem Phys Lett 2013. [DOI: 10.1016/j.cplett.2013.10.046] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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37
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Saleem F, Rao GK, Kumar A, Mukherjee G, Singh AK. Half-Sandwich Ruthenium(II) Complexes of Click Generated 1,2,3-Triazole Based Organosulfur/-selenium Ligands: Structural and Donor Site Dependent Catalytic Oxidation and Transfer Hydrogenation Aspects. Organometallics 2013. [DOI: 10.1021/om400057e] [Citation(s) in RCA: 71] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/17/2023]
Affiliation(s)
- Fariha Saleem
- Department of Chemistry, Indian Institute of Technology Delhi, New Delhi-110016,
India
| | - Gyandshwar Kumar Rao
- Department of Chemistry, Indian Institute of Technology Delhi, New Delhi-110016,
India
| | - Arun Kumar
- Department of Chemistry, Indian Institute of Technology Delhi, New Delhi-110016,
India
| | - Goutam Mukherjee
- Department of Chemistry, Indian Institute of Technology Delhi, New Delhi-110016,
India
| | - Ajai K. Singh
- Department of Chemistry, Indian Institute of Technology Delhi, New Delhi-110016,
India
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38
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Prakash O, Sharma KN, Joshi H, Gupta PL, Singh AK. Half sandwich complexes of chalcogenated pyridine based bi-(N, S/Se) and terdentate (N, S/Se, N) ligands with (η6-benzene)ruthenium(ii): synthesis, structure and catalysis of transfer hydrogenation of ketones and oxidation of alcohols. Dalton Trans 2013; 42:8736-47. [DOI: 10.1039/c3dt00126a] [Citation(s) in RCA: 35] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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39
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Prakash O, Singh P, Mukherjee G, Singh AK. Efficient Catalysis of Transfer Hydrogenation of Ketones and Oxidation of Alcohols with Newly Designed Half-Sandwich Rhodium(III) and Iridium(III) Complexes of Half-Pincer Chalcogenated Pyridines. Organometallics 2012. [DOI: 10.1021/om300169p] [Citation(s) in RCA: 45] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/16/2023]
Affiliation(s)
- Om Prakash
- Department
of Chemistry, Indian Institute of Technology Delhi, New Delhi 110016, India
| | - Pradhumn Singh
- Department
of Chemistry, Indian Institute of Technology Delhi, New Delhi 110016, India
| | - G. Mukherjee
- Department
of Chemistry, Indian Institute of Technology Delhi, New Delhi 110016, India
| | - Ajai K Singh
- Department
of Chemistry, Indian Institute of Technology Delhi, New Delhi 110016, India
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40
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MEBI CHARLESA. DFT study on structure, electronic properties, and reactivity of cis-isomers of [(NC5H4-S)2Fe(CO)2]. J CHEM SCI 2011. [DOI: 10.1007/s12039-011-0131-2] [Citation(s) in RCA: 77] [Impact Index Per Article: 5.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/17/2022]
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41
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Affiliation(s)
- Pratim Kumar Chattaraj
- Department of Chemistry, Center for Theoretical Studies, Indian Institute of Technology, Kharagpur, India
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42
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43
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Liu S, Govind N. Toward understanding the nature of internal rotation barriers with a new energy partition scheme: ethane and n-butane. J Phys Chem A 2008; 112:6690-9. [PMID: 18563887 DOI: 10.1021/jp800376a] [Citation(s) in RCA: 84] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
On the basis of an alternative energy partition scheme where density-based quantification of the steric effect was proposed [Liu, S. B. J. Chem. Phys. 2007, 126, 244103], the origin of the internal rotation barrier between the eclipsed and staggered conformers of ethane and n-butane is systematically investigated in this work. Within the new scheme, the total electronic energy is decomposed into three independent components, steric, electrostatic, and fermionic quantum. The steric energy defined in this way is repulsive, exclusive, and extensive and intrinsically linked to Bader's atoms in molecules approach. Two kinds of differences, adiabatic (with optimal structure) and vertical (with fixed geometry), are considered for the molecules in this work. We find that in the adiabatic case the eclipsed conformer possesses a larger steric repulsion than the staggered conformer for both molecules, but in the vertical cases the staggered conformer retains a larger steric repulsion. For ethane, a linear relationship between the total energy difference and the fermionic quantum energy difference is discovered. This linear relationship, however, does not hold for n-butane, whose behaviors in energy component differences are found to be more complicated. The impact of basis set and density functional choices on energy components from the new energy partition scheme has been investigated, as has its comparison with another definition of the steric effect in the literature in terms of the natural bond orbital analysis through the Pauli Exclusion Principle. In addition, profiles of conceptual density functional theory reactivity indices as a function of dihedral angle changes have been examined. Put together, these results suggest that the new energy partition scheme provides insights from a different perspective of internal rotation barriers.
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Affiliation(s)
- Shubin Liu
- Renaissance Computing Institute, University of North Carolina, Chapel Hill, North Carolina 27599-3455, USA
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44
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Zhong A, Rong C, Liu S. Structural and Dynamic Properties of (SiO2)6 Silica Nanostructures: A Quantum Molecular Dynamics Study. J Phys Chem A 2007; 111:3132-6. [PMID: 17391013 DOI: 10.1021/jp0702200] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Structural and dynamic properties of the building block of silica nanowires, (SiO2)6, are investigated by Born-Oppenheimer quantum molecular dynamics simulations. Thirteen conformers have been identified, seven of which have not been reported before. The energy component analysis shows that the lower electrostatic interaction differentiates the global minimum from the other structures. We also observe that the maximum hardness principle can be employed to justify the molecular stability for this system. Time profiles of a few density functional reactivity indices exhibit correlations of dynamic fluctuations between HOMO and LUMO and between chemical potential and hardness. Electrophilicity, nucleaofugality, and electrofugality indices are found to change concurrently and significantly, indicating that the nanostructures sampled during the dynamic process are exceedingly reactive and rich in chemistry.
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Affiliation(s)
- Aiguo Zhong
- Department of Chemistry, Taizhou College, Linhai, Zhejiang 317000, People's Republic of China
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45
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Rong C, Lian S, Yin D, Zhong A, Zhang R, Liu S. Effective simulation of biological systems: Choice of density functional and basis set for heme-containing complexes. Chem Phys Lett 2007. [DOI: 10.1016/j.cplett.2006.11.092] [Citation(s) in RCA: 32] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
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