Crystal structure of triethanolammonium bis(1-hydroxyethane-1,1-diphosphonato)diaquazincate pentahydrate, [(OHCH2CH2)3NH][Zn(H2O)2(H2.5 L)2] ⋅ 5H2O

Abstract

The crystal structure of [(HOCH2CH2)3NH][Zn(H2O)2(H2.5L)2] ⋅ 5H2O, where H4L is 1-hydroxyethane-1,1-diphosphonic acid, was determined by X-ray diffraction. The anionic complex has a cis-octahedral structure. The zinc atom is coordinated by four O atoms of two bidentate chelate H2.5L1.5− ligands and two O atoms of water molecules. The Zn-O(L) bond lengths range between 2.050 and 2.175 A, and the Zn-O(H2O) bond lengths are 2.105 and 2.133 A. The anionic complexes, triethanolammonium cations, and molecules of crystallization water are interlinked by an extensive network of hydrogen bonds. The crystallographic data for isostructural complexes of cobalt and nickel are given.