Synthesis, Magneto-Spectral and Thermal Studies of Cobalt(II) Complexes of 4-[N-(Benzalidene)amino]antipyrine thiosemicarbazone and 4-[N-(2´ -Hydroxybenzalidene)amino] antipyrine thiosemicarbazone

Abstract

Reactions of CoX₂ (X = Cl, NO₃, NCS, CH₃COO or CIO₄) with
4-[N-(benzalidene)amino] antipyrine thiosemicarbazone (BAAPTS)
or 4-[N -(2' -hydroxybenzalidene )amino ]antipyrine thiosemicarbazone
(HBAAPTS) yielded complexes of the type CoX₂·(L)·H₂O or
Co(CIO₄)₂·2L (L = BAAPTS or HBAAPTS). The infrared spectra
of these complexes indicate that the thiosemicarbazones  behave as
neutral tridentate (N,N,S) ligands. All the complexes are six-coordinated
according to the data of magnetic and electronic spectral
measurements.