Synthesis, Characterization, Crystal Structure, and Thermal Analysis of 2-chloro-N-(1,5-dimethyl-3-oxo-2-phenyl-2,3-dihydro-1H-pyrazol-4-yl)acetamide

The title compound, C13H14O2N3Cl, has been synthesized by the reaction of chloroacetyl chloride with 4-aminoantipyrine in basic media and characterized by FT-IR, CHN elemental analysis, UV-Vis, TGA, DTA, DSC and single crystal X-ray diffraction. crystals are monoclinic, sp. gr. P2(1)/c, a = 6.9994(6), b = 12.4035(13), c = 15.836(2) angstrom, beta = 100.367(9)degrees, Z = 4. The crystal structure is stabilized by N-H center dot center dot center dot O and C-H center dot center dot center dot O interactions, the former interactions result in the formation of dimers corresponding to R-2(2) (10) graphset motif and the dimers are further connected by C-H center dot center dot center dot O hydrogen bonding forming chains. In addition, the thermal stability of the compound was determined by TGA, DTA, DSC analysis, and absorption at lambda(max) = 298 nm was determined by UV-Vis spectrophotometer.