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