Double O,C,O-chelated diorganotin(IV) cation

The synthesis of double O,C,O-chelated diorganotin(IV) compound L2SnBr2 (1), where L is 2,6-(MeOCH2)2C6H3−, the precursor for the synthesis of Sn ← O intramolecularly coordinated organotin(IV) cations is reported. Treatment of compound 1 with SnBr4 yielded the double O,C,O-chelated diorganotin(IV) ionic pair [L2SnBr]+ [SnBr5·THF]− (2). Both compounds 1 and 2 were characterized by 1H, 13C, 119Sn NMR and molecular structure of compound 2 was established by X-ray diffraction.