3,5,5-Triphenyl-4,5-dihydro-1,2,4-oxadiazole

Reaction of benzophenone imine with benzeneoximoyl chloride performed in th e presence of triethylamine in diethyl ether affords the title compound, C2 0H16N2O In the crystalline state, the product exists in two conformations d iffering in the orientation of the 3-phenyl substituent with respect to the heterocyclic ring. N-H ... N hydrogen bonds link the molecules into chains parallel to the b axis.