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Acta Cryst. (2013). E69, o1362-o1363  [ doi:10.1107/S1600536813020059 ]

Tris(4-formylphenyl)phosphane oxide tetrahydrofuran hemisolvate

J. Kakoullis, F. R. Fronczek and A. W. Maverick

Abstract: The title compound, C21H15O4P·0.5C4H8O, contains an ordered phosphane oxide in a general position and a tetrahydrofuran solvent molecule disordered about a twofold axis. All three aldehyde substituents are nearly coplanar with their attached benzene rings, with C-C-C-O torsion angles in the range 1.64 (17)-4.24 (19)°. All three have different conformations with respect to the P=O group, one syn, one anti, and one gauche. Two of the aldehyde substituents form intermolecular C-H...O contacts.

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