Oxonium (dihydrogen 1-amino­ethane-11-diyldiphospho­nato-κ2 NO)hydrogen (1-amino-1-phosphono­ethyl)phospho­nato-κ2 NOpalladium(II) trihydrate

摘要

The title compound, (H3O)[Pd(C2H7NO6P2)(C2H8NO6P2)]·3H2O, was synthesized by the reaction of [Pd(H2O)4](NO3)2 with 1-amino­ethane-1,1-diyldiphospho­nic acid in aqueous solution. The asymmetric unit contains one mol­ecule of the complex existing as an anion, an oxonium counter-ion and three solvent water mol­ecules. The Pd^II ion occupies a position on a pseudo-twofold axis, which is not realized crystallographically. The slightly distorted square-planar coordination environment of the Pd^II ion consists of the O atoms from two phospho­nic acid groups and two N atoms of the amino groups in cis positions. The crystal structure displays N—H⋯O and O—H⋯O hydrogen bonding, which creates a wide three-dimensional network.