Author: Popov L. Levchenkov S. Shcherbakov I. Kogan V.
Publisher: MAIK Nauka/Interperiodica
ISSN: 1070-3632
Source: Russian Journal of General Chemistry, Vol.77, Iss.7, 2007-07, pp. : 1284-1292
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Abstract
Acid-base properties of hydrazones derived from 8-hydrazinoquinoline and substituted salicylaldehydes were studied. Under the experimental conditions, only the first step of ionization of the hydrazones is realized. The ionization constants were calculated quantum-chemically. Copper(II) complexes of these hydrazones, (HL)Cu(X)(CH3OH)n, were isolated (HL− is the monodeprotonated form of hydrazones, and X− is the acid residue). According to the data of elemental analysis, IR spectroscopy, conductometry, and magnetochemistry, the majority of the complexes have a binuclear structure. The copper(II) ions in the dimeric complex show antiferromagnetic exchange coupling. The ionization constants of the hydrazones and the exchange parameters strongly depend on the substituent in the salicylaldehyde moiety.
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