Crystal structure of silver [(propane-1,3-diyl-dinitrilo-κ(2)N,N')-tetra-acetato-κ(4)O,O',O'',O''']chromate(III) from synchrotron X-ray data.

The asymmetric unit of the title compound, Ag[Cr(C(11)H(14)N(2)O(8))]·3H(2)O, contains one [Cr(1,3-pdta)](-) anion [1,3-pdta is (propane-1,3-diyldi-nitrilo)-tetra-acetate], one Ag(+) cation and three water mol-ecules. The Cr(3+) ion is coordinated to the four O and two N atoms of the 1,3-pdta ligand, displaying a distorted octa-hedral geometry. The mean Cr-N and Cr-O bond lengths are 2.0727†(17) and 1.9608†(15)†à , respectively. The conformations of the chelate rings were found to be envelope for the glycinates and twist-boat for the six-membered di-amine (T) ring. The Ag(+) cation is surrounded by six O atoms from three non-coordinated carbonyl O atoms of neighbouring 1,3-pdta groups and three water mol-ecules. The crystal structure is stabilized by inter-molecular hydrogen bonding involving the water O-H group as donor and the carboxyl O atom as acceptor.