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New organotin(1V) complexes of the types. R,SnL,, [where n = 3, m = 1, R = C,H,. CI-I, or C4119; n = 2, m = 2 . R = C,H, or C,H, and L = anion of N-acetylglycine (HL') and ~-acetyl-i)i.-tryptophan (HL')]. (R,Sn),L' [where R = C,H,, CH, or C,H, and L' = anion of N-acetyl-i--cysteine (H2L3)], R$nL'[where R = C,H, or C4H9 and L' = anion of (H2L3)] and Bu,(L)SnOSn(L)Bu, [where L = anion of (HL')] have been synthesized and characterized by elemental analyses, molar conductance. electronic. infrared, far-infrared, 'H NMR, I3C NMR and "' Sn Miissbauer spectral studies. Thermal studies of three complexes have been carried out in the temperature range 18-1O0O0 C using TG, DTG and DTA techniques. Possible structures of the complexes have also been proposed.

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