Crystal Structure of Bromido­penta­kis­(tetra­hydro­furan-Κo)magnesium Bis­[1,2-Bis­(di­phenyl­phosphan­yl)benzene-κ2p,p′]cobaltate(−1) Tetra­hydro­furan Disolvate

Structural characterization of the ionic title complex, [MgBr(THF)5][Co(dpbz)2]·2THF [THF is tetra­hydro­furan, C4H8O; dpbz is 1,2-bis­(di­phenyl­phosphan­yl)benzene, C30H24P2], revealed a well-separated cation and anion co-crystallized with two THF solvent mol­ecules that inter­act with the cation via weak C—H⋯O contacts. The geometry about the cobalt center is pseudo­tetra­hedral, as is expected for a d10 metal center, only deviating from an ideal tetra­hedral geometry because of the restrictive bite angles of the bidentate phosphane ligands. Three THF ligands of the cation and one co-crystallized THF solvent mol­ecule are each disordered over two orientations. In the extended structure, the cations and THF solvent mol­ecules are arranged in (100) sheets that alternate with layers of anions, the latter of which show various π-inter­actions, which may explain the particular packing arrangement.