Preparation, IR, 13C and 119mSn Mössbauer spectral studies of organotin(IV) derivatives of ethylenediaminetetraacetic acid

Abstract New diorganotin(IV) and triorganotin(IV) derivatives (R 2 Sn) n EDTA (R  Me, Et, Pr, n Bu, n Oct; n = 1, 2); (R 2 Sn) 3 (EDTAH) 2 (R  n Bu, n Oct); and (R 3 Sn) 3 EDTAH (R  ME, n Bu, Ph, Cyh) have been prepared by reacting diorganotindichloride and triorganothinchloride with di-, tri- and tetra-silver salts of ethylenediaminetetraacetic acid (EDTAH 4 ) in 1:1, 2:1, 3:2 and 3:1 (metal/ligand) molar ratio, respectively. The 3:2 diorganotin(IV) compounds possess an octahedral geometry around the Sn atom whereas the diorganotin (1:1, 2:1) and triorganotin (3:1) have five coordinate trigonal bipyramidal geometry around the Sn atom. One of the organotin moieties in (R 2 Sn) 3 (EDTAH) 2 acts as a bridge between two EDTA molecules, resulting in a novel type of complex.