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The title compound N-[1-(4-chlorophenyl)-1,4-dihydro-4-oxe-6-methylpyridazine- 3-carbonyl]-N(-benzoylhydrazine was prepared by the reaction of 1-(4-chlorophenyl)-1,4- dihydro-4-oxe-6-methylpyridazine-3-carboxylic acid with chloroformate ethyl ester and benzoyl hydrazine in the presence of triethylamine. The crystal structure ([C19H15ClN4O3]2·C2H5OH, Mr =811.67) has been determined by X-ray crystal structural analysis. The crystal is monoclinic, space group P21/c, with unit cell parameters a=13.296(3), b=17.155(3), c=17.459(3)?,β=98.959(4), Z=4, V=3934(1) ?3, Dc=1.371g/cm3, F(000)=1688, μ(MoKα)=0.226 mm-1, R=0.0495, wR=0.1348 for 3345 observed reflections (I >2σ(I)). The hydrogen bonds N(3)－H…O(1) , N(7)－H…O(4), and N(8)－H…O(2) can be observed.
The title compound N- [1- (4-chlorophenyl) -1,4-dihydro-4-oxe-6-methylpyridazine-3- carbonyl] -N (-benzoylhydrazine was prepared by the reaction of 1- (4-chlorophenyl) -1,4-dihydro-4-oxe-6-methylpyridazine-3-carboxylic acid with chloroformate ethyl ester and benzoyl hydrazine in the presence of triethylamine. The crystal structure ([C19H15ClN4O3] 2 · C2H5OH, Mr = 811.67) has been determined The crystal is monoclinic space group P21 / c with unit cell parameters a = 13.296 (3), b = 17.155 (3), c = 17.459 (3) ), Z = 4, V = 3934 (1)? 3, Dc = 1.371 g / cm3, F (000) = 1688, μ (MoKα) = 0.226 mm-1, R = 0.0495, wR = 0.1348 for 3345 observed reflections (I> 2σ (I)). The hydrogen bonds N (3) -H ... O (1), N (7) -H ... O (4), and N observed.