The structure of bis(trimethylammonium) undecachlorotriantimonate(III) [(CH3)(3)NH](2)Sb3Cl11 containing a novel antimony(III) anion

The structure of [(CH3)(3)NH](2)Sb3Cl11 (space group P2(1)/n; a = 10.374(2) b = 23.723(5), c = 11.884(2) Angstrom, beta = 113.46(3)degrees; V = 2682.9 (9) Angstrom(3)) consists of a structurally novel [Sb3Cl112-] anion and two crystallographically nonequivalent trimethylammonium cations. There are th ree deformed octahedra in the asymmetric part of the unit cell. They are co nnected with each other by edges and corners forming a characteristic polya nionic layer. Trimethylammonium cations, one ordered and one disordered, ar e connected to the inorganic sublattice by N-H ... Cl hydrogen bonds.