“…Similarly, antipyrine (2,3-dimethyl-1-phenylpyrazol-5one) and its derivatives possess a wide variety of biological activity. We have reported the preparation and characterization through elemental analysis, physical and spectral studies, of coordination compounds of Fe III , Co II and Co III with 4-formylantipyrine N(4)-methyl-, N(4)-dimethy-and 3-piperidylthiosemicarbazones (El-Sawaf et al, 1998). In this paper, we report the crystal structure of the Co III complex, (I), with 2,3-dimethyl-5-oxo-1-phenyl-2,5-dihydro-1H-pyrazole-4carbaldehyde 4,4-dimethylthiosemicarbazone.…”