1-Diphenylphosphino-2-phenyl-1,2-dicarba-closo-dodecaborane(12)

Article abstract of DOI:10.1107/S0108270196009109

The two crystallographically independent molecules of the title compound, 1-[(C₆H₅)₂P]-2-C₆H₅-1,2-C₂B₁₀H₁₀ (C₂₀H₂₅B₁₀P), in the asymmetric fraction of the unit cell are highly congruent. The conformation of the cage phenyl groups is defined by θ=1.15° and the average C1-C2 distance is 1.744(8)A, which is significantly longer than that usually found for 1,2-C₂B₁₀H₁₀ compounds. The PPh₂ substituent is tilted away from an idealized radical position on C1 as a result of intramolecular crowding.