Eight new 1:2 Adducts of Nickel(II)thioxanthates with dimethylsulphoxide and hexamethylphosphoramide have been prepared. The resulting adducts have been characterized by elemental analysis, molar conductance, magnetic susceptibility measurement, biological studies, thermal gravimetric analysis, mass, IR and UV-visible spectral studies. Analytical data reveals that Ni(II) complexes forms 1:2 adducts. Antifungal activities of some of these adducts have been carried out against the fungal strain Sclerotium rolfsii. Electronic and magnetic measurements indicate distorted octahedral geometry for the 1:2 adducts of Ni(II) adducts