2-Amino-pyridinium trans-diaqua-bis-(oxalato-κ(2)O,O)chromate(III)

Acta Crystallogr Sect E Struct Rep Online. 2012 Nov 1;68(Pt 11):m1325-6. doi: 10.1107/S1600536812040950. Epub 2012 Oct 6.

Abstract

In the title hybrid salt, (C(5)H(7)N(2))[Cr(H(2)O)(2)(C(2)O(4))(2)], the Cr(III) ion is coordinated in a slightly distorted octa-hedral environment by four O atoms from two oxalate ligands in the equatorial plane and by two water O atoms in the axial sites. The 2-amino-pyridinium cation is disordered over two sets of sites in a 0.800 (7):0.200 (7) ratio. In the crystal, N-H⋯O and O-H⋯O hydrogen bonds connect the components into a three-dimensional network. The crystal studied was an inversion twin with components in a ratio 0.75 (2):0.25 (2).