Cobalt(II), nickel(II) and copper(II) complexes of 2-thiouracil and it
s arylazo derivatives were prepared. The elemental analysis suggest a
range of 1:1, 2:1 and 1:3 stoichiometries. Electronic spectra and magn
etic susceptibility measurements were used to infer the structures and
the i.r. spectra of the ligands and their complexes to identify the t
ype of bonding.