Heteroligand cobalt(II) complexes with some aromatic acid hydrazides and L-histidine
Bіomplex formation in the ternary systems cobalt(II) – benzoic / p-methoxybenzoic / o-hydroxybenzoic acid hydrazide – L-histidine has been studied by the methods of spectrophotometry and mathematical modelling in the aqueous solutions with 1.0 mol dm–3 KNO3 as a background. The formation constants a...
| Main Authors: | , |
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| Format: | Article |
| Language: | English |
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Kazan Federal University
2019-03-01
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| Series: | Учёные записки Казанского университета: Серия Естественные науки |
| Subjects: | |
| Online Access: | https://kpfu.ru/uz-eng-ns-2019-1-3.html |
| Summary: | Bіomplex formation in the ternary systems cobalt(II) – benzoic / p-methoxybenzoic / o-hydroxybenzoic acid hydrazide – L-histidine has been studied by the methods of spectrophotometry and mathematical modelling in the aqueous solutions with 1.0 mol dm–3 KNO3 as a background. The formation constants and spectral parameters of homo- and heteroligand complexes have been determined. It has been shown that the stability of the complexes formed with o-hydroxybenzoic acid hydrazide was higher than that with p-methoxybenzoic and benzoic acid hydrazides. Extra stabilization of the heteroligand complexes has been identified and interpreted. The quantum-chemical optimization of the cobalt(II) heteroligand complex structure containing the single-charged anionic form of o-hydroxybenzoic acid hydrazide and histidine zwitterion has been carried out. |
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| ISSN: | 2542-064X 2500-218X |