Crystal Structure and Magnetic Properties of Copper(II) and Nickel(II) Binuclear Complexes with Bisacylhydrazones Based on 2,6-Diformyl-4-methylphenol

• Published in: Zeitschrift für anorganische und allgemeine Chemie (1950) Vol. 635; no. 3; pp. 530 - 536
• Main Authors: Tupolova, Yuliya P., Popov, Leonid D., Lukov, Vladimir V., Shcherbakov, Igor N., Levchenkov, Sergey I., Kogan, Victor A., Maevskiy, Oleg V., Vlasenko, Valeriy G., Zubenko, Alexander A.
• Format: Journal Article
• Language: English
• Published: Weinheim WILEY-VCH Verlag 01-03-2009; WILEY‐VCH Verlag
• Subjects: Coordination chemistry; Copper; Magnetic properties; Nickel; X-ray diffraction
• ISSN: 0044-2313; 1521-3749
• DOI: 10.1002/zaac.200801299

The series of binuclear Cu(II) and Ni(II) complexes with an asymmetrical exchange fragment based on 2,6‐diformyl‐4‐methylphenol bishydrazone has been synthesized for the first time. The compositions and structures of both ligands and its complexes have been established with the data of IR, 1H NMR, and extended X‐ray absorption fine structure (EXAFS) spectroscopical studies as well as magnetic measurements. The structure of [Ni2L3(μ‐Pz)]·2CH3OH (L = triply deprotonated form of bishydrazone, Pz = pyrazol) was confirmed by X‐ray crystallographic analysis. In this complex, the coordination environment of two nickel ions is quite different, one nickel atom is square‐planar and the other is distorted octahedral coordinated. The values of exchange parameter calculated in terms of HDVV theory have been compared with the features of an asymmetrical exchange fragment's electronic and geometrical structure.