Syntheses and Crystal Structures of Schiff Base N-Isonicotinamidosalicylaidimine and 4-Salicylaldehydylaminoantipyrine

The Schiff base N-isonicotinamidosalicylaidimine 1 and 4-salicylaldehydylaminoantipyrine 2 were synthesized by the reaction of salicylaldehyde with isonicotinyl hydrazide and 4-aminoantipyrine, respectively. Their crystal structures were determined by single-crystal X-ray diffraction method and characterized by elemental analysis, UV-Vis and IR spectra. Compound 1: monoclinic, space group P21/n with cell parameters: a = 8.153(1),b = 15.574(4) , c = 9.554(2) ? b = 105.48(1), V = 1169.1(4) ? , Z = 4, C13H11N3O2, Mr = 241.25, Dc = 1.371g/cm3 , m = 0.096 mm-1, F(000) = 504, the final R = 0.0832 and wR = 0.115. 2384 independent reflections were collected and 2059 (I 2(I)) can be observed. Compound 2: monoclinic, space group P21/n with cell parameters: a = 7.597(1),b = 7.500(1), c = 27.266(5) , b = 95.31(1), V = 1546.7(4) ? , Z = 4, C18H17N3O2, Mr = 307.35, Dc = 1.320 g/cm3 , m = 0.088 mm-1, F(000) = 648,the final R = 0.0413 and wR = 0.0952. 3282 independent reflections were collected and 2711(I 2(I)) can be observed. The structure was solved by direct methods and refined by full-matrix least-squares techniques. The X-ray analysis reveals that the crystal structures of compounds 1 and 2 are two-dimensional layer structures through intramolecular hydrogen bonding and -?stacking.