Abstract
In the title ylide, C31H28ClO2P [common name α-acetyl-α-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.
Highlights
In the title ylide, C31H28ClO2P [common name -acetyl- -pchlorobenzoylmethylenetri(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) A ] and the P—C, C—C and C O bond lengths are consistent with electron delocalization involving the O atoms
Summary
Key indicators: single-crystal X-ray study; T = 298 K; mean (C–C) = 0.003 A; R factor = 0.040; wR factor = 0.099; data-to-parameter ratio = 14.9. C31H28ClO2P [common name -acetyl- -pchlorobenzoylmethylenetri(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) A ] and the P—C, C—C and C O bond lengths are consistent with electron delocalization involving the O atoms
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