Trimethyl-3-methoxy-4-oxo-5-triphenylphosphoranylidenecyclopent-1-ene-1,2,3-tricarboxylate

Acta Crystallographica Section E

Structure Reports Online

Volume 66, Part 11 (November 2010)

organic compounds

cv2753 scheme

Acta Cryst. (2010). E66, o2792 [ doi:10.1107/S1600536810037815 ]

Trimethyl-3-methoxy-4-oxo-5-triphenylphosphoranylidenecyclopent-1-ene-1,2,3-tricarboxylate

K. K. Krawczyk, K. Wojtasiewicz, J. K. Maurin, E. Gronowska and Z. Czarnocki

Abstract: The title compound, C₃₀H₂₇O₈P (2), was formed as one of two products {(1) [Krawczyk et al. (2010). Acta Cryst. E66 (cv2752)] and (2)} in the reaction of dimethyl acetylenedicarboxylate with triphenylphosphine. The molecule of (2) consists of a five-membered carbocyclic ring. The P atom is a part of a triphenylphosphoranylidene substituent. In contrast to (1), the five-membered ring of (2) is planar, the r.m.s. deviation being only 0.009 (2) Å.