Synthesis, Spectral and Structural Studies of Neutral Co(II), Ni(II) and Cu(II) Macrocyclic Dithiocarbamate- Based Complexes Formed via one pot reaction

Abstract

The synthesis of dinuclear transition metal(II) macrocyclic dithiocarbamate
complexes and there characterisation are reported. The dithiocarbamate complexes
were prepared via a one pot reaction by mixing the secondary amine {N1,N4-
dibenzhydrylbenzene-1,4-diamine}, CS2, KOH, and metal chloride. The modes of
bonding and overall geometry of the compounds were determined through
physicochemical and spectroscopic methods; elemental analysis, FTIR, UV-Vis,
magnetic susceptibility, conductance, melting points, mass spectroscopy and 1H-, 13C-
, DEPT, 1H- 1H COSY, 1H- 13C HQMC NMR spectroscopy. These studies revealed
the formation of dimetal bisdithiocarbamate complexes of the general formula
[M(L)]2 with tetrahedral geometry about Co(II) and Ni(II) atoms. However, square
planar geometries have been suggested for Cu(II) complex in a solid state but its
exhibited octahedral ina liquid states.