Synthesis and characterization of a new cyclobutane-substituted Schiff base ligand and its Co(II), Cu(II) and Ni(II) complexes

A new ligand, 4-(1-phenyl-1-methylcyclobutane-3-yl)-2-(2-hydroxy-5-bromo)be nzylideneaminothiazole (LH), has been synthesized starting from 1-phenyl-1- methyl-3-(2-chloro-1-oxoethyl)cyclobutane, thiourea and 2-hydroxy-5-bromobe nzaldehyde. Mononuclear complexes with a metal-ligand ratio of 1:2 have bee n prepared with Co(II), Cu(II), and Ni(II). Attempts to prepare the Cd(II) complex of the ligand in different solvents have failed. The authenticity o f the ligand and its complexes was established based on elemental analyses, IR, C-13 and H-1 NMR spectra, UV-Vis, magnetic susceptibility measurements and thermogravimetric analyses (TGA).