Crystal and Molecular Structure of Acylalmino Derivatives of 1-(2,4,6-Trichlorophenyl)-4,5-dihydropyrazol-5-one

Abstract

The structure of acylamino derivatives of 1-(2,4,6-trichlorophenyl)-4,5- dihydropyrazol-5-one was studied by X-ray diffraction. 3-Acetylamino-1- (2,4,6-trichlorophenyl)-4,5-dihydropyrazol-5-one and 3-benz-oylamino-1-(2,4,6- trichlorophenyl)-4,5-dihydropyrazol-5-one exist in crystal as CH tautomers. The nature and number of acylamino groups were found to affect the nature of intermolecular hydrogen bonds in the crystals studied.