METAL HYDRAZIDE COMPLEXES
Г€. B. Miminoshvili
Keywords: complex compounds, X-ray diffraction analysis, carbonic acid hydrazides, benzoic acid monohydrazide, m-hydroxybenzoic acid monohydrazide, malonic acid dihydrazide, succinic acid dihydrazide, glutaric acid dihydrazide
Pages: 174-181
Abstract
Results of studies performed under the guidance of A. E. Shvelashvili and continued after his decease are analyzed. We consider the coordination compounds containing both mono- and dihydrazides of carbonic acids; in particular, monohydrazides of monobasic benzoic and m-hydroxy benzoic acids (BH=C6H5C(O)NHNH2, m-HBH=HOC6H5C(O)NHNH2) and dihydrazides (DHs) of dibasic acids: malonic, succinic, and glutaric (DM=H2NHN(O)C(CH2)C(O)NHNH2, DS=H2NHN(O)C(CH2)2C(O)NHNH2, and DG=H2NHNOC(CH2)3CONHNH2). Complex compounds of metals with carbonic acid hydrazides are grouped by the ratio between main components (M:Lig = 1:1 and M:Lig = 1:2) and by the gross formulas: M(Lig)XYnH2O and M(Lig)2XYnH2O, where M(II) = Ca, Mn, Fe, Co, Ni, Cu, Zn, and Sr; Lig = ВН, m-HBH, DM, DS, DG, Х, Y (X, Y = Cl-, NCS-, I-, Br-, and are identical or different acido ligands, n = 0-4. The compounds with carbonic acid dihydrazides are classified by the redistribution criterion of ligands in the -M-DH-M- bonds depending on the M:DH ratio and the nature of the acido ligand. A division into two groups is performed by the criteria: 1) pairs of metal atoms with single bis-bidentate bridges; 2) pairs of metal atoms with double bis-bidentate bridges. Packing features of structural units are revealed in compounds containing residuals of carbonic acid hydrazides.
|
