Crystal structure of an organic-inorganic supramolecular salt based on a 4,4'-methylenebis(3,5-dimethyl-1H-pyrazol-2-ium) cation and a beta-octamolybdate anion

Abstract

The asymmetric unit of the title compound, bis[4,40-methylenebis(3,5-dimethyl- 1H-pyrazol-2-ium)] -octamolybdate, (C11H18N4)2[Mo8O26] or (H4mbdpz)2[Mo8O26], is composed of an H4mbdpz2+ cation and half of the -octamolybdate anion which is completed by inversion symmetry. The organic molecular units are engaged in a series of N H O hydrogen bonds with neighbouring anions, with N O distances and N H O angles in the ranges 2.730 (2) 2.941 (2) A ° and 122 166 , respectively. These interactions lead to the formation of a supramolecular two-dimensional network parallel to the (010) plane.