Acta Cryst. (2001). E57, o94-o95  [ doi:10.1107/S1600536800020419 ]

[4-(Diphenylphosphino)-9,9-dimethylxanthen-5-yl]diphenylphosphine oxide toluene hemisolvate

D. D. Ellis and A. L. Spek

Abstract: In the title compound, C₃₉H₃₂O₂P₂·0.5C₇H₈, there are two distinct phosphorus centers. The P-C bond lengths around the diphenylphosphino group are around 0.04 Å larger than those in the phosphine oxide moiety. This corresponds to smaller C-P-C bond angles of 101.2 (15)° compared to 108.4 (9)° for the latter. The rigid dibenzopyran backbone is folded at an angle of 158.9 (1)°.

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