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2:1 adducts involving [Zn(dtc) 2 ] 2 (dtc= pipdtc-, H 10 C 5 NCS2 ; dnpdtc-, (H 3 CCH 2 CH 2 ) 2 NCS2 ; dedtc, (H 5 C 2 ) 2 NCS2 ; dmdtc-, (H 3 C) 2 NCS2 ; nmedtc-, HOCH 2 CH 2 (CH) 3 NCS2 ; deadtc-, (HOCH 2 CH 2 ) 2 NCS2 ) and 4,4' – bipyridine were prepared and characterized by elemental analyses, IR, UV-Visible, Cyclic voltammetric and thermal studies. IR spectra of the complexes show the reduction in the thioureide stretching frequency due to the increase in coordination around the zinc ion and the resultant increase in electron density. The charge transfer transitions are observed in the region 260 – 320 nm by electronic spectra. Thermal studies show a single stage weight loss. The cyclic voltammetric study on the complexes show an increase of electron density on zinc in the adducts compared to [Zn(dtc) 2 ] 2 . The bond valence sum(BVS) analysis shows the values to be close to ‘2’, which is equivalent to the formal oxidation state of zinc in the zinc complexes.

Synthesis, Characterization Studies and Bond Valence Sum (BVS) analysis on 2:1 Adducts Involving Zinc(II)dithiocarbamates and 4,4’-Bipyridine