Acta Cryst. (2013). E69, o183 [ doi:10.1107/S1600536812051689 ]
Abstract: In the title ylide, C31H28ClO2P [common name -acetyl--p-chlorobenzoylmethylenetri(p-tolyl)phosphorane], the dihedral angle between the 4-chlorophenyl ring and that of the ylide moiety is 66.15 (10)°. The geometry around the P atom is slightly distorted tetrahedral [angle range = 105.22 (8)-115.52 (9)°] and the carbonyl O atoms are syn-oriented with respect to the P atom. The ylide group is close to planar [maximum deviation from the least-squares plane = 0.006 (2) Å] and the P-C, C-C and C=O bond lengths are consistent with electron delocalization involving the O atoms.
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