Research Article: 2,4-Bis(diphenyl­phosphan­yl)-1,1,2,3,3,4-hexa­phenyl-1,3-diphospha-2,4-dibora­cyclo­butane tetra­hydro­furan sesqui­solvate

Date Published: April 01, 2012

Publisher: International Union of Crystallography

Author(s): Normen Peulecke, Bernd H. Müller, Anke Spannenberg, Uwe Rosenthal.


In the title compound, C60H50B2P4·1.5C4H8O, the diphospha­diborane mol­ecule lies on an inversion centre, whereas the disordered tetra­hydro­furan solvent mol­ecule is in a general position with a partial occupancy of 0.75. The diphosphadiborane mol­ecule consists of an ideal planar four-membered B2P2 ring with an additional phenyl and a –PPh2 group attached to each B atom.

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For the structure of a monomeric diphosphaborane mol­ecule, see: Bartlett et al. (1988 ▶). For assumed monomeric PhB(PPh2)2, see: Coates & Livingstone (1961 ▶). For the structures of other dimeric boron-bridged bis­phosphine compounds, see: Herdtweck et al. (1997 ▶); Kaufmann et al. (1997 ▶); Nöth (1987 ▶).