Abstract
Four bis(organotin(IV)) carboxylates dithiocarboxylates of the general formulae R2(Cl)SnLCS2Sn(Cl)R2 and R3SnLCS2SnR3 have been synthesized by a room temperature reaction between sarcosine (LH), potassium hydroxide (KOH), carbon disulphide (CS2) and R2SnCl2/R3SnCl (where R = n-Bu, Ph) following 1:1:1:2 molar ratio in methanol. The synthesized products have been characterized by microanalysis and various spectroscopic (IR, 1H NMR) techniques. Elemental (C, H, N and S) analysis data agreed well with the molecular composition of the products. FT-IR data indicated a bidentate binding mode of both the carboxylate and dithiocarboxylate donor regions of the ligand and penta-coordinated geometries around Sn(IV). 1H NMR spectroscopy demonstrates a stronger deshielding effect on the methylene protons of the ligand after complexation and flow of electronic charge density towards the metal centers. The de-shielding effect is more pronounced in chlorodiorganotin(IV) derivatives as compared to triorganotin(IV) derivatives. The complexes displayed significant antimicrobial potential depending upon the substitution pattern at tin(IV). The triorganotin(IV) derivatives generally exhibited a higher antibacterial/antifungal potential as compared to their dibutyltin(IV)/diphenyltin(IV) counterparts. The in vitro hemolytic activity investigations have shown that average lysis of human red blood cells caused by stannic products was significantly lower as compared to triton X-100 (positive control, 100 % lysis) and not very much higher than PBS (negative control, 0 % lysis). The chlorodibutyltin(IV) derivative 1 had shown the lower activity than its tri-analog 3 but chlorodiphenyltin(IV) derivative 2 had shown comparatively higher hemolytic effects than its tri-analog 4.
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Mariam, S., Hussain, S., Ali, S. et al. Homobimetallic (Sn,Sn) Complexes with [2-Dithiocarboxy(methyl)amino]acetic Acid: Synthesis, Characterization and Biological Studies. Iran J Sci Technol Trans Sci 42, 1277–1284 (2018). https://doi.org/10.1007/s40995-016-0127-3
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DOI: https://doi.org/10.1007/s40995-016-0127-3