SYNTHESIS AND STRUCTURE OF DIFFERENT-METAL AND ONIUM GERMANIUM (IV) COORDINATION COMPOUNDS WITH GALACTARIC ACID, Mg2+, Ca2+, Ba2+ IONS, ISONIAZID AND NICOTINAMIDE
Journal Title: Вісник Одеського національного університету. Хімія - Year 2017, Vol 22, Issue 1
Abstract
According to the new-designed method of synthesis the solid coordination compounds of Germanium (IV) with galactaric acid (H6Gala), Mg2+, Ca2+, Ba2+ ions and exo-ligands (isoniazidе (Ind) and nicotinamidе (Nad)) were obtained: M(Н2О)6][Ge2(μ-HGala)2]·nH2O (M= Mg (I), Ca (II), Ba (III)), (НL)2[Ge2(μ-HGala)2] (L = Ind (IV) and Nad (V)). Due to the data of elemental analyses the molar ration in compounds I-III is Ge : НGala5– : M (Mg2+, Ca2+, Ba2+) =1:1:0.5 and in IV, V – Ge : НGalа5– : L (Ind, Nad)= 1:1:1. Comparatively to the spectrum of initial acid, in the IR-spectra of compounds I-V the stretching vibrations of СООН group are absent and symmetrical and asymmetrical valence vibrations of СОО– ions appear. Consequently carboxylic groups of ligand are deprotonated and bonded with Germanium atom monodentate (Δν = νas(COO-) – νs(COO-) ~ 332 см-1). This was confirmed by presence of Ge-O valence vibrations. The molecular formulas of the compounds I-V and their preparation reactions were suggested due to the data of elemental analyses, thermogravimetry (presence of 6 coordinated water molecules and 2 (I, III) or 6 (III) crystallization water molecules) and IR-spectroscopy: 2GeO2 + 2H6Gala + MСO3 + (1+x)H2O = [M(Н2О)6][Ge2(μ-НGala)2]·xH2O(I-III) + CO2 2GeO2 + 2H6Gala + 2L = (НL)2[Ge2(μ-НGala)2] (IV,V) + 5H2O
Authors and Affiliations
E. A. Chebanenko, E. E. Martsinko, I. I. Seifullina, E. V. Afanasenko
Keywords
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- EP ID EP334412
- DOI 10.18524/2304-0947.2017.1(61).94709
- Views 80
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