Carbon-Sulfur Bond Cleavage in Methanesulfonate on Diorganotin Quinaldate Platform - Synthesis and Characterization of [(n-BuSnL)SO].

The synthesis of mixed ligand di-n-butyltin complexes, [(n-BuSnL)SO], 2-4 (HL=2-quinoline/ 1-isoquinoline/ 4-methoxy-2-quinoline carboxylic acid) has been realized by reacting n-BuSn(OMe)OSOMe, 1 a with the corresponding quinaldic acid under solvothermal conditions. The observed transformation of methane sulfonate to sulfate anion represents a rare example of C-S bond cleavage on the organotin scaffolds, n-BuSn(L)OSOMe, which have been identified as en route intermediates by NMR and X-ray crystallography. Analogous reaction when extended with MeSn(OMe)OSOMe, 1 b and HL yields [(MeSn)(L)(OSOMe)], 5 as partially disproportionated product of MeSn(L)OSOMe. The solid-state structures of 2-5 reveal variable modes of coordination of the ligands to afford molecular and polymeric motifs.