Lanthanide silasesquioxanes: monomeric and functionalised complexes
Abstract
Lanthanide tris(silylamides) LnL3 reacted with 2/3 equivalents of the trisilanol (C6H11)7Si7O9(OH)31 in THF to give the lanthanide silasesquioxanes [(C6H11)7Si7O12Ln(THF)2] which are dimeric in solution at 233 K. Reaction of LnL3 with 1 equivalent of 1 in THF resulted in complete conversion of 1 into the trisilylated compound (C6H11)7Si7O9(OSiMe3)3 as does reaction of LnL3 with 2/3 equivalents of 1 in
)2] with 1 equivalent of (Me2NCH2CH2)2NMe (PMDTA) gave the monomeric complex [(C6H11)7Si7O12Ln(PMDTA)]. The chloro-functionalised lanthanide silasesquioxane [(C6H11)7Si7O11(OSiMe3)LnCl(THF
)] was formed by reaction of [(C6H11)7SiO7O12Ln(THF
)2]with 1 equivalent of Me3SiCl. New compounds have been characterised by