Spectral Studies of Co(II), Ni(II) and Cu(II) Complexes with 3-phenyl-2-thioquinazoline-4-(3H)-one, Semicarbazone and Thiosemicarbazone†

Abstract

A series of complexes of the type M(HL¹)₂ and [M(HL^2-3)₂X₂], where M = Co(II), Ni(II) and Cu(II); HL¹ = 3-phenyl-2-thioquinazoline-4-(3H)-one, HL² = 3-phenyl-2-thioquinazoline-4-(3H) semicarbazone; HL³ = 3-phenyl-2-thioquinazoline-4-(3H) thiosemicarbazone; X = Cl^– and Br^–, have been synthesized and characterised by elemental analysis, molar conductivity, infrared spectra, electronic spectra and magnetic moment data. On the basis of experimental data the complexes of the type M(L¹)₂ are found to be square-planar whereas complexes of the type [M(HL^2-3)₂X₂] are found to be octahedral. The complexes are found to be nonelectrolytic in nature on the basis of molar conductivity values.