5-Cyano-6-( 4-pyridyl)-2-thiouracil as a building block in transition metal bipyridyl chemistry

Abstract

Multifunctional ligand 5-cyano-6-(4-pyridyl)-2-thiouracil (LH2) has been prepared and used in the synthesis of polymeric complexes. The general compositions of the complexes (M bpyLH₂ Cl₂)n. [M=Cu(II) and Zn(II)] have been assigned on the basis of their elemental analysis and spectroscopic (IR, NMR, UV-visible and EPR) data. FAB mass data recorded upto 1000 range also support higher composition of the complexes. Powder X-ray diffraction, optical microscopic and scanning electron microscopic (SEM) studies have also been carried out. Force field calculations have been carried out to simulate the energy minimized structures of the dimeric unit of the complexes. The geometry around each Cu(II) centre

has been found to be distorted octahedral whereas Zn(II) complexes possess octahedral geometry. Solid state conductance has also been measured at room temperature as well as at higher temperatures.