Acta Cryst. (2013). C69, 1494-1497 [ doi:10.1107/S0108270113031181 ]
Abstract: The title salts calcium (glycinato-2N,O)oxidobis(peroxido-2O,O')vanadate(V) tetrahydrate, Ca[VO(O2)2(NH2CH2COO)]·4H2O, and strontium (glycinato-2N,O)oxidobis(peroxido-2O,O')vanadate(V) tetrahydrate, Sr[VO(O2)2(NH2CH2COO)]·4H2O, crystallized at pH ca 7.4 with similar lattice parameters. The glycinate anion acts as a bidentate N,O-chelating ligand, and the V atom has a pentagonal bipyramidal geometry, with two 2-peroxo groups and the glycinate N atom in the equatorial plane, and one terminal oxo and a glycinate O atom at the axial positions. The H atoms of three of the four water molecules in the strontium salt exhibited disorder over three positions for each molecule.
CCDC references: 972726 and 972727
Formula: Ca[V(C2H4NO2)(O2)O]·4H2O and Sr[V(C2H4NO2)(O2)O]·4H2O
Keywords: (glycinato)oxidobis(peroxido)vanadate(V); calcium salt; strontium salt; crystal structure.
Structure factor file (CIF format) (144.9 kbytes)
Structure factor file (CIF format) (146.6 kbytes)
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