title: Oxonium (dihydrogen 1-amino-ethane-1,1-diyldiphospho-nato-κN,O)[hydrogen (1-amino-1-phosphono-ethyl)phospho-nato-κN,O]palladium(II) trihydrate.
abstract: The title compound, (H(3)O)[Pd(C(2)H(7)NO(6)P(2))(C(2)H(8)NO(6)P(2))]·3H(2)O, was synthesized by the reaction of [Pd(H(2)O)(4)](NO(3))(2) with 1-amino-ethane-1,1-diyldiphospho-nic acid in aqueous solution. The asymmetric unit contains one mol-ecule of the complex existing as an anion, an oxonium counter-ion and three solvent water mol-ecules. 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 phospho-nic 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.
authors.affiliation: Institute of General and Inorganic Chemistry, National Academy of Science Ukraine, Prospekt Palladina 32/34, Kyiv 03680, Ukraine.
authors.forename: Anatolij
authors.initials: A
authors.lastname: Dudko
authors.forename: Vladimir
authors.initials: V
authors.lastname: Bon
authors.forename: Alexandra
authors.initials: A
authors.lastname: Kozachkova
authors.forename: Natalia
authors.initials: N
authors.lastname: Tsaryk
authors.forename: Vasily
authors.initials: V
authors.lastname: Pekhnyo