Ligand driven assembly of a monoorganooxotin cage from the reactions of organotin precursors with phosphonate ligands

Abstract

The reaction of <i>n</i>-BuSn(OH)₂Cl with <i>t</i>-BuP(O)(OH)₂ in a 1:2 ratio in refluxing toluene or stirring in acetonitrile at room temperature forms the monoorganooxotin cage, [(<i>n</i>-BuSn)₂O{ O₂P(OH)-<i>t</i>-Bu}₄]₂ <b>1</b> in good yields. The reaction conditions have been varied to optimize the yield of the oxo cluster. An intermediate leading to the formation of <b>1</b> has been identified by ³¹P NMR spectroscopy. Compound <b>1</b> can be used as a single-source precursor for the formation of SnP₂O₇ by a low temperature decomposition process at 750^oC.

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