Synthesis, structure and reactions of [(BuSn)12O14(OH)6]Cl2 · 2H2O: Solution studies using 119Sn NMR and electrospray mass spectrometry

Abstract

The compound [(BuSn)12O14(OH)6]Cl2 · 2H2O (1) has been made on a preparative scale and its structure determined by X-ray crystallography. Tin-119 NMR spectroscopy and electrospray mass spectrometry indicate that the cationic structure [(BuSn)12O14(OH)62+ observed in the solid state is retained in solution. Two of the hydroxyl protons at six-coordinate tin centres are acidic and react with methanol to give [(BuSn)12O14(OH)4(OMe)2]Cl2. Compound 1 can be used as a precursor for the formation of other organotin oligomers such as [{BuSn(OH)O2PPh2}3O][Ph2PO2]. The hydroxy groups in the latter compound can be replaced in solution in a stepwise fashion to give eventually [{BuSn(OMe)O2PPh2}3O][Ph2PO2]. © 1994.