title: 2,4-Bis(diphenyl-phosphan-yl)-1,1,2,3,3,4-hexa-phenyl-1,3-diphospha-2,4-dibora-cyclo-butane tetra-hydro-furan sesqui-solvate.
abstract: In the title compound, C(60)H(50)B(2)P(4)·1.5C(4)H(8)O, the diphospha-diborane mol-ecule lies on an inversion centre, whereas the disordered tetra-hydro-furan solvent mol-ecule is in a general position with a partial occupancy of 0.75. The diphosphadiborane mol-ecule consists of an ideal planar four-membered B(2)P(2) ring with an additional phenyl and a -PPh(2) group attached to each B atom.
authors.affiliation: Leibniz-Institut für Katalyse e.V. an der Universität Rostock, Albert-Einstein-Strasse 29a, 18059 Rostock,  Germany.
authors.forename: Normen
authors.initials: N
authors.lastname: Peulecke
authors.forename: Bernd H
authors.initials: BH
authors.lastname: Müller
authors.forename: Anke
authors.initials: A
authors.lastname: Spannenberg
authors.forename: Uwe
authors.initials: U
authors.lastname: Rosenthal