Carbon‐Sulfur Bond Cleavage in Methanesulfonate on Diorganotin Quinaldate Platform – Synthesis and Characterization of [(n‐Bu2SnL)2SO4]

Abstract

AbstractThe synthesis of mixed ligand di‐n‐butyltin complexes, [(n‐Bu2SnL1−3)2SO4], 2–4 (HL1−3=2‐quinoline/ 1‐isoquinoline/ 4‐methoxy‐2‐quinoline carboxylic acid) has been realized by reacting n‐Bu2Sn(OMe)OSO2Me, 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‐Bu2Sn(L1−3)OSO2Me, which have been identified as en route intermediates by NMR and X‐ray crystallography. Analogous reaction when extended with Me2Sn(OMe)OSO2Me, 1 b and HL2 yields [(Me2Sn)2(L2)3(OSO2Me)], 5 as partially disproportionated product of Me2Sn(L2)OSO2Me. The solid‐state structures of 2–5 reveal variable modes of coordination of the ligands to afford molecular and polymeric motifs.