Synthesis and Structural Features of S-Benzyl Dithiocarbazate Schiff Base Complexes of Si(IV)

Abstract

The present paper describes the synthesis and structural features of the silicon complexes with S-benzyldithiocarbazate Schiff bases. The resulting complexes of the type, Si(OAc)_4–2L_n (where L is the dianion of the ligand and n = 1 or 2) have been characterized on the basis of elemental analyses, molecular weight determinations and conductivity measurements. The nature of bonding has been further discussed on the basis of IR and ¹H NMR spectral data. The covalent bonding of oxygen and sulphur with silicon and a dative bond between silicon and nitrogen indicate trigonal bipyramidal and octahedral geometries for Si(OAc)₂L and SiL₂ type of derivatives, respectively. A few representative complexes have also been screened for their fungicidal as well as bactericidal activity and found to be quite active in this respect.