Poly[[μ-aqua-aqua­[μ4-ethyl (dichloro­methyl­ene)diphospho­nato]sesqui­calcium(II)] acetone hemisolvate 4.5-hydrate]

Abstract

The title compound, {[Ca1.5(C3H5Cl2O6P2)(H2O)2]·0.5CH3COCH3·4.5H2O}n, has a two-dimensional polymeric structure. The asymmetric unit contains two crystallographically independent Ca2+ cations connected by a chelating and bridging ethyl (dichloro­methyl­ene)diphos­pho­n­ate(3−) ligand and an aqua ligand. One of the Ca atoms, lying on a centre of symmetry, has a slightly distorted octa­hedral geometry, while the other Ca atom is seven-coordinated in a distorted monocapped trigonal-prismatic geometry. The polymeric layers are further connected by extensive O—H⋯O hydrogen bonding into a three-dimensional supra­molecular network. The acetone solvent mol­ecule and one uncoordin­ated water mol­ecule are located on twofold rotation axes