Synthesis and spectroscopic characterization of bis(N-alkyldithiocarbamato)nickel(II) complexes: crystal structures of [Ni(S₂CNH(n-Pr))₂] and [Ni(S₂CNH(i-Pr))₂]

Abstract

Bis(N-alkyldithiocarbamato)nickel(II) complexes (1–5) [Ni(S₂CNHR)₂] (where R = Me, Et, n-Pr, i-Pr, n-Bu) were synthesized by the reaction of NiCl₂ · 6H₂O and the corresponding sodium salt of N-alkyldithiocarbamate in 1 : 2 molar ratio in aqueous medium. These bis(N-alkyldithiocarbamato)nickel(II) complexes (1–5) were characterized by elemental analysis, UV-Visible, IR, and ¹H/¹³C-NMR spectroscopy. The crystallographic investigation of [Ni(S₂CNH(n-Pr))₂] (3) and [Ni(S₂CNH(i-Pr))₂] (4) revealed distorted square-planar geometry around nickel(II). The dithiocarbamates have anisobidentate coordination with nickel and the dithiocarbamates are trans.

Keywords:

• Dithiocarbamate
• Nickel(II) complex
• Bidentate coordination

Acknowledgments

S.C. Bajia is grateful to UGC, New Delhi, for providing financial support. The authors thank the University of Hyderabad for providing the X-ray facilities.