Abstract
Novel compounds of dimethyl- and dibutyltin(IV) with O-tolyl/benzyldithiocarbonates were successfully obtained by the reaction of Me(2)SnC(l2) and n-Bu(2)SnCl(2) with sodium salt of O-tolyl/benzyldithiocarbonates, [o-, m- and p-CH(3)C(6)H(4)OCS(2)Na and C(6)H(5)CH(2)OCS(2)Na], in 1:2 molar ratio in dry toluene. The structure of these newly synthesized complexes has been examined by elemental analysis, FT-IR, multinuclear NMR ((1)H, (13)C and (119)Sn) spectroscopy. The thermal behaviour of the complex (8) has been studied by TGA/DTA analysis. The complex (8), n-Bu2Sn(S2COCH2C6H5)2, crystallizes in the monoclinic space group C2/c, in which tin adopts a distorted octahedron or skew trapezoidal bipyramidal geometry accompanied by two n-butyl chains and the two dithiocarbonate ligands coordinated in an anisobidentate fashion. Antifungal activities against fungus Fusarium sp. of these organotin(IV) derivatives exhibited enhanced activity compared to the free ligands.
Highlights
Tin is known to produce a large number of organometallic derivatives of commercial use
The sodium salts of O-tolyl/benzyl dithiocarbonates were prepared according to the published method37 (Step 1)
The elemental analyses, C, H, S and Sn were found consistent with the molecular formula of these compounds. These compounds were further characterized by thermogravimetric analysis (TGA) and various spectral studies viz. IR, 1H, 13C and 119Sn NMR
Summary
Tin is known to produce a large number of organometallic derivatives of commercial use. Inorganic and organotin compounds have found industrial use as catalysts like in heterogeneous oxidation catalysts based on tin(IV) oxide and homogeneous catalysts for industrial organic and polymeric reactions.. A variety of uses have been found for organic and inorganic tin compounds as fungicides, moluscicides and stabilizers in plastics.. Organotin(IV) compounds are well known to form complexes with ligands having oxygen, sulfur and nitrogen donor sites. The properties of aryl xanthates are similar to those of 1,1-dithiolates. These ligands and their metal derivatives are somewhat more susceptible to thermal and atmospheric decomposition than the analogous alkyl derivatives.. These ligands and their metal derivatives are somewhat more susceptible to thermal and atmospheric decomposition than the analogous alkyl derivatives. Because of the importance of both tin and dithiocarbonate complexes as antitumour agents and due to their synthetic versatility and practical utility, we undertake the synthesis of new tin(IV) complexes with dithiocarbonate ligands as no attempt has been made to synthesize and characterize organotin(IV) complexes with these ligands
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