Synthesis and Spectroscopic Investigations of Zn(II) and Cd(II) Complexes of Tridentate N-Donor Ligand

Abstract

The novel complexes, [CdL₂](NO₃)₂·2H₂O (1) and [Zn(L)(H₂O)](NO₃)₂ (2), have been synthesized by reaction of N, N″-bis(methyl-2-amino-1-cyclopentene-1-dithiocarboxylate) diethylenetriamine (L), with Cd(II) and Zn(II) salts. The ligand and complexes have been characterized by elemental analysis, IR, ¹H NMR, ¹¹³Cd NMR spectra. Spectroscopic studies show the ligand coordinates to Zn and Cd in tridentate neutral form via three nitrogen atoms. Complex 1 is six-coordinate and complex 2 is four coordinate with one coordinated water molecule. ¹¹³Cd NMR confirms a CdN₆ central core for complex 1.