The title compound, 2,4-dichloro-6-exo-9-endo-bis(dimethylphenylphosphino)-
arachno-decarborane(10) [(PMe2Ph)(2)B10H10Cl2 or C16H32B10C12P2], has a typ
ical arachno ten-vertex cluster geometry, with one of the phosphine ligands
bound exo-polyhedrally and the other in an uncommon endo configuration.