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Acta Cryst. (2012). E68, m73  [ doi:10.1107/S1600536811053608 ]

Tripotassium (bis{[bis(carboxylatomethyl)amino]methyl}phosphinato)cuprate(II) dihydrate

L. Liu, R. Zhang, P. Fan, Z. Yu and X. Zhang

Abstract: In the title compound, K3[Cu(C10H12N2O10P)]·2H2O, the CuII ion, one potassium cation and a P atom are situated on a twofold rotation axis. The CuII ion is coordinated by two N and four O atoms from one bis{[bis(carboxylatomethyl)amino]methyl}phosphinate ligand in a distorted octahedral coordination geometry. The two crystallographically independent potassium ions exhibit different coordination environments. The potassium ion in a general position is heptacoordinated by five carboxylate O atoms, one phosphinate O atom and one water molecule [K-O = 2.718 (3)-3.040 (3) Å], and the potassium ion situated on the twofold rotation axis is hexacoordinated by four carboxylate O atoms and two water molecules [K-O = 2.618 (3)-2.771 (3) Å]. The water molecules are also involved in formation of intermolecular O-H...O hydrogen bonds.

Online 21 December 2011

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