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Sinha S, Giri S. Ab initio investigation on the mechanism of SO 2 activation by P/B intermolecular frustrated Lewis pairs. J Mol Model 2024; 30:241. [PMID: 38954102 DOI: 10.1007/s00894-024-06038-4] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/03/2024] [Accepted: 06/20/2024] [Indexed: 07/04/2024]
Abstract
CONTEXT In silico study investigates the activation of sulfur dioxide by newly designed frustrated Lewis pairs, i.e., [P(tBu)3…B(C2NBSHF2)3], where the Lewis acid part is a super Lewis acid. The activation process involves the making of P-S and B-O bonds, leading to the formation of an FLP-SO2 adduct. The calculated results demonstrate that the activation of SO2 by the FLP is almost barrierless and exothermic. Exploration of the impact of the solvent environment on the feasibility and energetics of the reaction has been investigated. The exothermicity is increasing in nonpolar solvents. METHODS This study focuses on understanding the electronic activity of SO2 activation by FLP with the help of the Minnesota 06 functional, M06-2X (global hybrid functional with 54% HF exchange) along with Pople's basis set, 6-311G (d, p). Principal interacting orbital and extended transition state-natural orbitals for chemical valence studies, giving impactful insight into the favorable orbital interaction and electron transfer in this reaction. Furthermore, useful CDFT descriptors such as reaction force constant and reaction electronic flux profiles along the intrinsic reaction coordinate give insights into the synchronicity and total electronic activity of the reaction.
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Affiliation(s)
- Swapan Sinha
- School of Applied Science and Humanities, Haldia Institute of Technology, Haldia, 721657, India
- Maulana Abul Kalam Azad University of Technology, Haringhata, 741249, India
| | - Santanab Giri
- School of Applied Science and Humanities, Haldia Institute of Technology, Haldia, 721657, India.
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Alajrawy OI, Almhmdi AA. Dioxomolybdenum (VI) and oxomolybdenum (IV) complexes with N, O, and S bidentate ligands, syntheses, spectral characterization, and DFT studies. J Mol Struct 2022. [DOI: 10.1016/j.molstruc.2022.132813] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
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Mercero JM, Rezabal E, Ugalde JM, Weiske T, Li J. Experiment and Theory Clarify: Sc+ Receives One Oxygen Atom from SO2 to Form ScO+, which Proves to be a Catalyst for the Hidden Oxygen-Exchange with SO2. Chemphyschem 2021; 23:e202100773. [PMID: 34942051 PMCID: PMC9303259 DOI: 10.1002/cphc.202100773] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/27/2021] [Revised: 12/23/2021] [Indexed: 11/05/2022]
Abstract
Using Fourier‐transform ion cyclotron resonance mass spectrometry, it was experimentally determined that Sc+ in the highly diluted gas phase reacts with SO2 to form ScO+ and SO. By 18O labeling, ScO+ was shown to play the role of a catalyst when further reacting with SO2 in a Mars‐van Krevelen‐like (MvK) oxygen exchange process, where a solid catalyst actively reacts with the substrate but emerges apparently unchanged at the end of the cycle. High‐level quantum chemical calculations confirmed that the multi‐step process to form ScO+ and SO is exoergic and that all intermediates and transition states in between are located energetically below the entrance level. The reaction starts from the triplet surface; although three spin‐crossing points with minimal energy have been identified by computational means, there is no evidence that a two‐state scenario is involved in the course of the reaction, by which the reactants could switch from the triplet to the singlet surface and back. Pivotal to the oxygen exchange reaction of ScO+ with SO2 is the occurrence of a highly symmetric four‐membered cyclic intermediate by which two oxygen atoms become equivalent.
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Affiliation(s)
- Jose M Mercero
- Universidad del Pais Vasco / Euskal Herriko Unibertsitatea, SGIker, PK 1072, 20080, Donostia, SPAIN
| | - Elixabete Rezabal
- Euskal Herriko Unibertsitatea: Universidad del Pais Vasco, Advanced Polymers and Materials: Physics, Chemistry and Technology, SPAIN
| | - Jesus M Ugalde
- Euskal Herriko Unibertsitatea: Universidad del Pais Vasco, Advanced Polymers and Materials: Physics, Chemistry and Technology, SPAIN
| | | | - Jilai Li
- Jilin University, Institute of theoretical Chemistry, CHINA
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Haribabu J, Alajrawy OI, Jeyalakshmi K, Balachandran C, Krishnan DA, Bhuvanesh N, Aoki S, Natarajan K, Karvembu R. N-substitution in isatin thiosemicarbazones decides nuclearity of Cu(II) complexes - Spectroscopic, molecular docking and cytotoxic studies. SPECTROCHIMICA ACTA. PART A, MOLECULAR AND BIOMOLECULAR SPECTROSCOPY 2021; 246:118963. [PMID: 33017789 DOI: 10.1016/j.saa.2020.118963] [Citation(s) in RCA: 17] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/22/2020] [Revised: 09/08/2020] [Accepted: 09/14/2020] [Indexed: 06/11/2023]
Abstract
The mono- (1) and bi-nuclear (2) copper(II) complexes containing N-substituted isatin thiosemicarbazone(s) were synthesized, and characterized by analytical and spectroscopic (UV-Visible, FT-IR and EPR) techniques. Bimetallic nature of complex 2 was confirmed by single crystal X-ray crystallography. The structures predicted by spectroscopic and crystallographic methods were validated by computational studies. From the spectroscopic, crystallographic and computational data, the structures were found to be distorted square planar for 1 and distorted square pyramidal for 2. Molecular docking studies showed hydrogen bonding and hydrophobic interactions of the complexes with tyrosinase kinase receptors. Complex 1 exhibited promising cytotoxic activity against Jurkat (leukemia) cell line, and complex 2 displayed more activity against HeLa S3 (cervical) and Jurkat cell lines with the IC50 values of 3.53 and 3.70 μM, respectively. Cytotoxicity of 1 (Jurkat) and 2 (Jurkat and HeLa S3) was better than that of cisplatin. Morphological changes in A549 (lung), HeLa S3 and Jurkat cell lines were examined in presence of the active complexes with the co-staining of Hoechst, AO (acridine orange) and EB (ethidium bromide) by fluorescence microscope.
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Affiliation(s)
- Jebiti Haribabu
- Department of Chemistry, National Institute of Technology, Tiruchirappalli 620015, India; Faculty of Pharmaceutical Sciences, Tokyo University of Science, 2641 Yamazaki, Noda 278-8510, Japan
| | - Othman I Alajrawy
- College of Applied Science, Department of Applied Chemistry, University of Fallujah, Fallujah 00964, Iraq
| | - Kumaramangalam Jeyalakshmi
- Department of Chemistry, National Institute of Technology, Tiruchirappalli 620015, India; Department of Chemistry, M. Kumarasamy College of Engineering, Karur 639113, India
| | - Chandrasekar Balachandran
- Faculty of Pharmaceutical Sciences, Tokyo University of Science, 2641 Yamazaki, Noda 278-8510, Japan
| | - Dhanabalan Anantha Krishnan
- Centre of Advanced Study in Crystallography and Biophysics, University of Madras, Guindy Campus, Chennai 600025, India
| | - Nattamai Bhuvanesh
- Department of Chemistry, Texas A & M University, College Station, TX 77842, USA
| | - Shin Aoki
- Faculty of Pharmaceutical Sciences, Tokyo University of Science, 2641 Yamazaki, Noda 278-8510, Japan; Research Institute for Science and Technology, Tokyo University of Science, 2641 Yamazaki, Noda 278-8510, Japan
| | - Karuppannan Natarajan
- Department of Chemistry, Sri Ramakrishna Mission Vidyalaya College of Arts and Science, Coimbatore 641 020, India
| | - Ramasamy Karvembu
- Department of Chemistry, National Institute of Technology, Tiruchirappalli 620015, India.
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Soliman AA, Attaby FA, Alajrawy OI, Majeed SR, Sahin C, Varlikli C. Soluble Cytotoxic Ruthenium(II) Complexes with 2-Hydrazinopyridine. RUSS J INORG CHEM+ 2019. [DOI: 10.1134/s0036023619060020] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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Robinson R, Shaw MF, Stranger R, Yates BF. Theoretical study of the mechanism for the sequential N–O and N–N bond cleavage within N2O adducts of N-heterocyclic carbenes by a vanadium(iii) complex. Dalton Trans 2016; 45:1047-54. [DOI: 10.1039/c5dt03600c] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The addition of N-heterocyclic carbene (NHC) increases the activity of N2O towards cleavage of both the N–O and N–N bonds.
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Affiliation(s)
- Robert Robinson
- School of Physical Sciences (Chemistry)
- University of Tasmania
- Hobart
- Australia
| | - Miranda F. Shaw
- School of Physical Sciences (Chemistry)
- University of Tasmania
- Hobart
- Australia
| | - Robert Stranger
- Research School of Chemistry
- Australian National University
- Canberra
- Australia
| | - Brian F. Yates
- School of Physical Sciences (Chemistry)
- University of Tasmania
- Hobart
- Australia
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