[1,2-Bis(dicyclohexylphosphanyl)-1,2-dicarba-closo-dodecaborane-2κ2P,P′]di-μ-chlorido-1:2κ4Cl:Cl-dichlorido-1κ2Cl-dimercury(II)

Abstract

The title compound, [Hg2Cl4(C26H54B10P2)], was synthesized by the reaction of 1,2-bis(dicyclohexylphosphanyl)-1,2-dicarba-closo-dodecaborane with HgCl2. Both HgIIatoms show a distorted tetrahedral coordination geometry, provided by the two bridging chloride anions and the P atoms of the diphosphanyl ligand for one metal atom, and by two bridging and two terminal chloride anions for the other. The five-membered HgP2C2chelate ring assumes an envelope conformation, with the HgIIatom displaced by 0.1650 (5) Å from the mean plane of the other four atoms (r.m.s. deviation = 0.002 Å). In the crystal, B—H...Cl interactions link the molecules, forming a supramolecular chain along thea-axis direction.