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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) Å, 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.

acta crystallographica. section e, crystallographic communications

Crystal structure of silver [(propane-1,3-diyldinitrilo-κ2N,N′)tetraacetato-κ4O,O′,O′′,O′′′]chromate(III) from synchrotron X-ray data