Tris(4,4′-di-tert-butyl-2,2′-bipyridine-κ2N,N′)molybdenum(II) μ6-oxido-dodeca-μ2-oxido-hexaoxidohexamolybdate(VI) acetonitrile tetrasolvate

Abstract

The asymmetric unit of the title compound, [Mo(C18H24N2)3][Mo6O19]·4CH3CN, comprises an [Mo(di-t-Bu-bipy)3]2+ cation (di-t-Bu-bipy is 4,4′-di-tert-butyl-2,2′-bipyridine), two halves of Lindqvist-type [Mo6O19]2− anions (with each anion completed by the application of a center of inversion) and four acetonitrile solvent molecules. The geometry around the metal atom of the cation resembles a distorted octahedron, with each of the three di-t-Bu-bipy ligands being almost planar [deviation from planarity < 6.3 (2)°]. Supramolecular interactions, namely Mo=O...π, C[triple-bond]N...π, C—H...O and C—H...N, along with electrostatic forces, mediate the crystal packing. Two of the tert-butyl groups are affected by rotational disorder which was modeled over two distinct positions with major site occupancies of 0.707 (9) and 0.769 (8).