Synthesis and structural characterisation of alkali metal complexes of heteroatom-stabilised 1,4- and 1,6-dicarbanions†
Abstract
A straightforward Peterson olefination reaction between either [{(Me2PhSi)3C}Li(THF)] or in situ-generated [(Me3Si)2{Ph2P(BH3)}CLi(THF)n] and paraformaldehyde gives the