Unusual kinetically stable dialkyltin(IV) oxides; X-ray structures of [{SnR2(µ-O)}2] and [{SnR2(OH)}2(µ-O)][R = CH(SiMe3)2]

Abstract

Treatment of Sn₂R₄[R = CH(SiMe₃)₂] with Me₃NO in n-C₆H₁₄ affords orange [{SnR₂(µ-O)}₂](1), which with H₂O in tetrahydrofuran instantly yields colourless [{SnR₂(OH)}₂(µ-O)](2) which under reflux in PhMe readily reverts to (1); the average Sn–O(µ) bond lengths are 1.96(2) for (1) and 1.956(4) for (2), Sn–OH is 2.032(7)Å for (2), and the Sn–O(µ)–Sn′ angles are 97.5(6) for (1) and 125.0(5)° for (2).