Abstract
Manganese, cobalt and nickel complexes of some Schiff base derivatives of antipyrine have been prepared and characterized. Spectroscopic and other studies on these air-stable complexes indicated that the Schiff bases are coordinated through the carbonyl oxygen of the pyrazolone ring, the quinonoid oxygen and the secondary nitrogen. The stereochemistry of the complexes as well as the nature of the bonding of the chloride were discussed.