SPECTRAL AND STRUCTURAL STUDIES ON NICKEL(II) DITHIOCARBAMATE COMPLEXES AND THEIR UTILITY FOR SENSING ANIONS

Abstract

Bis(N-(pyrrol-2-ylmethyl)-N-butyldithiocarbamato-S,S?)nickel(II) (1) and bis(N-methylferrocenyl-N-(2-phenylethyl)dithiocarbamato-S,S?)nickel(II) (2) have been prepared and characterized by IR, and UV-visible absorption spectra. The electrochemical anion sensing ability of bis(N-(pyrrol-2-ylmethyl)-N-butyldithiocarbamato-S,S?)nickel(II) (1) and bis(N-methylferrocenyl-N-(2-phenylethyl)dithiocarbamato-S,S?)nickel(II) (2) toward F ?, Cl ?, Br ? and I ? was investigated.  Cyclic voltammgram of 1 shows a peak at -0.8416 V which corresponds to the normally observed and well documented Ni(II)/Ni(I) reduction (one electron addition). The addition of F?, Cl? , Br ? and I? anions to electrochemical solutions of the complex 1 resulted in a significant shift in the Ni(II)/Ni(I) reduction potential