Synthesis and structures of [((Me3Si)(3)CAlF2)(2)(mu-O)Li-2(THF)(4)] and [{Li(Me3Si)(3)CAlF3(THF)}(3)LiF(THF)]

Abstract

The synthesis of [((Me3Si)(3)CAlF2)(2)(mu -O)Li-2- (THF)(4)] (1) and [{Li(Me3Si)(3)CAlF3(THF)}(3)LiF(THF)] (2) is reported. Compound 1 was obtained either by the reaction of (Me3Si)(3)CAlMe2. THF and Me3SnF in the presence of Li2O or by the reaction of (Me3Si)(3)CAlF2 and Li2O. 1 is an interesting example of an oxygen- and fluorine-containing alkyl aluminum compound. Complex 2 was prepared by the reaction of (Me3Si)(3)CAlF2. THF with LiOCH(CF3)(2) as an unexpected result that illustrates the variety of possible structures obtainable by the combination of (Me3Si)(3)CAlF2 and LiF.