Nickel(II) complexes of 4-acetamidobenzaldehyde N(4)-substituted thiosemicarbazones

Nickel(II) complexes with five 4-acetamidobenzaldehyde N(4)-substituted thi osemicarbazones have been prepared in EtOH solution and characterized by ph ysical and spectral methods. N.m.r., i.r. and electronic spectra of the thi osemicarbazones and their complexes, along with physical properties of the complexes, have been recorded. These thiosemicarbazones coordinate as anion ic ligands lin the thiosemicarbazone moiety's azomethine nitrogen and thiol ate sulfur [upon loss of the N(2) hydrogen] when reacted with NiCl2 in the presence of Et3N or with Ni(OAc)(2).