Crystal structure of bromido-penta-kis-(tetra-hydro-furan-κ)magnesium bis-[1,2-bis-(di-phenyl-phosphan-yl)benzene-κ ,']cobaltate(-1) tetra-hydro-furan disolvate.

Structural characterization of the ionic title complex, [MgBr(THF)][Co(dpbz)]·2THF [THF is tetra-hydro-furan, CHO; dpbz is 1,2-bis-(di-phenyl-phosphan-yl)benzene, CHP], revealed a well-separated cation and anion co-crystallized with two THF solvent mol-ecules that inter-act with the cation weak C-H⋯O contacts. The geometry about the cobalt center is pseudo-tetra-hedral, as is expected for a metal center, only deviating from an ideal tetra-hedral geometry because of the restrictive bite angles of the bidentate phosphane ligands. Three THF ligands of the cation and one co-crystallized THF solvent mol-ecule are each disordered over two orientations. In the extended structure, the cations and THF solvent mol-ecules are arranged in (100) sheets that alternate with layers of anions, the latter of which show various π-inter-actions, which may explain the particular packing arrangement.