THERMODYNAMIC AND KINETIC FACTORS OF THE STRUCTURE FORMATION OF BIS-CHELATE COMPLEXES OF NI(II) WITH O-HYDROXY- AND O-MERCAPTOAZOBENZAMIDES: A QUANTUM CHEMICAL STUDY
- Authors: Kharabaev N.N.1, Minkin V.I.1
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Affiliations:
- Research Institute of Physical and Organic Chemistry, Southern Federal University
- Issue: Vol 51, No 12 (2025)
- Pages: 763–773
- Section: Articles
- URL: https://journal-vniispk.ru/0132-344X/article/view/358348
- DOI: https://doi.org/10.7868/S3034549925120027
- ID: 358348
Cite item
Abstract
The molecular structures and relative energies of the low-spin bis-chelate Ni(II) complexes with o-hydroxy- and o-mercaptoazobenzene ligands were calculated using density functional theory, taking into account the possibility of forming trans- and cis-isomeric structures with six- and five-membered metallacycles. The kinetic factor governing the structure formation of NiL2 complexes was analyzed using a stepwise model of their formation (Ni2+ + (L)– → (NiL)+, (NiL)+ + (L)– → NiL2). The results show that the most favorable isomer of the complexes is determined not only by the energy advantage of a particular configuration, but also by its kinetic accessibility, which is governed by the activation barriers of the isomerization reactions of the products formed at the first step of the interaction of the initial reagents.
About the authors
N. N. Kharabaev
Research Institute of Physical and Organic Chemistry, Southern Federal University
Author for correspondence.
Email: nkharabaev@mail.ru
Doctor of Chemical Sciences, Professor, Leading Researcher Rostov-on-Don, Russian Federation
V. I. Minkin
Research Institute of Physical and Organic Chemistry, Southern Federal University
Email: viminkin@sfedu.ru
Doctor of Chemical Sciences, Professor, Academician of the Russian Academy of Sciences, Scientific Director Rostov-on-Don, Russian Federation
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