COMPARATIVE CHARACTERISTICS OF Co(II), Ni (II), Cu(II) COORDINATION COMPOUNDS WITH SOME HYDRAZONES OF PYRUVIC ACID
Journal Title: Вісник Одеського національного університету. Хімія - Year 2016, Vol 21, Issue 4
Abstract
Сonducted comparative analysis of the coordination compounds of Co2+, Ni2+, Cu2+ with condensation products of 2-(7-bromo-2-oxo-5-phenyl-2,3-dihydro-1H-1,4-benzodiazepin-1-yl) acetohydrazide – Hydazepam (Hydr), nicotinoyl- and isonicotinoyl hydrazones (H2N, H2I) with pyruvic acid (HPv): [Co(HydrHPv)Cl2]·2H2O (I), [Ni(HydrPv)2] (II), [Cu(HydrHPv) (H2O)Cl2] (III), [CoCl(HNPv)(H2O)2] (IV), [CoCl(HIPv)(H2O)2] (V), [NiCl(HNPv)(H2O)2] (VI), [NiCl(HIPv)(H2O)2] (VII), [CuCl(HNPv)]·H2O (VIII), [CuCl(HIPv)]·H2O (IX). Complexes characterized by elemental analysis, IR spectroscopy, electrical conductivity, and magnetic susceptibility. Thermal stability of the complexes has been characterized. Structure of the coordination node of the complexes has been determined by EXAFS-spectroscopy. Regardless of composition, structure by heterocyclic nitrogen-containing moiety of the molecules HydrHPv, H2NРv, H2IРv formation of I-IX complexes is due to binding of complexing with a hydrazide functional group ketone form of the ligands. Ni2+ complexes II, VI, VII are different by composition (Ni2+:HydrHPv в II = 1:2, Ni2+:H2NРv(H2IРv) в VI, VII = 1:1). Co2+, Cu2+ complexes with the same composition (M2+:ligand = 1:1). H2NPv, H2IPv in all complexes IV-IX – tridentate, occurs deprotonation and bonding carboxylate group НPv. HydrHPv coordinated to the Co2+, Cu2+ bidentate (I, III), without participation of the carboxylic group, and to the Ni2+ – tridentate (II).
Authors and Affiliations
A. V. Pulya, I. I. Seifullina, L. S. Skorokhod
Keywords
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- EP ID EP340656
- DOI 10.18524/2304-0947.2016.4(60).83665
- Views 99
- Downloads 0
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