Synthesis and characteristics of germanium(IV) complexes with salicylaldehyde isonicotinoylhydrazone (H(2)Is): Crystal and molecular structure of [Ge(HIs)Cl-3] center dot CH3COCH3

Germanium coordination compounds of different compositions were synthesized in nonaqueous media: [Ge(H(2)Is)(2)]Cl-4 (I) in benzene, [Ge(HIs)(2)]Cl-2 (II) in ethanol, and [Ge(HIs)Cl-3] . CH3COCH3 (III) in acetone (H(2)Is is N C5H4CONHNCHC6H4OH). The formulas are confirmed by electrical conductivity, mass spectrometry, thermogravimetry, and IR spectroscopy data. The molecule s of salicylaldehyde isonicotinoylhydrazone in I-III are coordinated to ger manium as tridentate chelating ligands through the oxygen atom of carbonyl group, nitrogen atom of the azomethine group, and oxygen atom of the deprot onated (in II and III) or protonated (in I) hydroxy group. The schemes of t he structures are given. Molecular and crystal structure of complex III are determined by X-ray crystallography. The compound consists of isolated com plex molecules and solvation acetone molecules without any specific intermo lecular interaction between them. The replacement of the solvent results in formation of homo- (I, II) and heteroligand (III) complexes with molecular and deprotonated forms of the ligand.