Date Published: October 01, 2012
Publisher: International Union of Crystallography
Author(s): Dennis H. Mayo, Yang Peng, Peter Zavalij, Kit H. Bowen, Bryan W. Eichhorn.
The title compound, a GaII dimer, [Ga2Br4(C12H23P)2], was synthesized by reaction of GaBr(THF)n (THF is tetrahydrofuran) with dicyclohexylphosphine in toluene. At 150 K the crystallographically centrosymmetric molecule exhibits disorder in which one of the two independent cyclohexyl groups is modelled over two sites in a 62 (1):38 (1) ratio. In d6-benzene solution, the compound exhibits virtual C2h symmetry as determined by 1H NMR. The coordination environment of the GaII atom is distorted tetrahedral.
For references related to the synthesis of the ‘GaBr’ precursor and to cluster formation, see: Schnoeckel (2010 ▶); Steiner et al. (2004 ▶). For other Ga—Ga containing compounds, see: Baker et al. (2003 ▶) (the analogous digallium tetraiodide compound); Uhl et al. (1989 ▶) [the first-reported Ga(II) dimer compound].