J. Kopf et al., (1,2,3-TRIPHENYLCYCLOPROPEN-3-YL)PROPANE-1,3-DIONE - A SUBSTITUTED CYCLOPROPENE WITH A BETA-DICARBONYL FRAGMENT, Acta crystallographica. Section C, Crystal structure communications, 52, 1996, pp. 722-724
The title compound, C30H26O2, has a conformation in which one of the c
yclopropanecarbonyl moieties bisects the plane of the cyclopropene rin
g. The bulky 1,2,3-triphenylcyclopropenyl substituent in the alpha-pos
ition of the beta-diketone excludes the possibility of any enolization
process. The asymmetry of the single-bond lengths in substituted cycl
opropenes, reported previously [Alien (1982), Tetrahedron, 38, 645-655
], is not observed in the present compound.