Carbon-Sulfur Bond Cleavage in Methanesulfonate on Diorganotin Quinaldate Platform - Synthesis and Characterization of [(n-Bu 2 SnL) 2 SO 4 ].

The synthesis of mixed ligand di-n-butyltin complexes, [(n-Bu 2 SnL 1-3 ) 2 SO 4 ], 2-4 (HL 1-3 =2-quinoline/ 1-isoquinoline/ 4-methoxy-2-quinoline carboxylic acid) has been realized by reacting n-Bu 2 Sn(OMe)OSO 2 Me, 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-Bu 2 Sn(L 1-3 )OSO 2 Me, which have been identified as en route intermediates by NMR and X-ray crystallography. Analogous reaction when extended with Me 2 Sn(OMe)OSO 2 Me, 1 b and HL 2 yields [(Me 2 Sn) 2 (L 2 ) 3 (OSO 2 Me)], 5 as partially disproportionated product of Me 2 Sn(L 2 )OSO 2 Me. The solid-state structures of 2-5 reveal variable modes of coordination of the ligands to afford molecular and polymeric motifs.