Monomeric magnesium 1-azaallyl and β-diketiminato complexes derived from the bis(trimethylsilyl)methyl ligand: The X-ray structure of the four-coordinate planar magnesium complex [Mg{N(R)C(But)C(H)R}2] and of [Mg({N(R)C(Ph)}2CH)2]†

Reaction of [K{N(R)C(But)C(H)R}]n {[K(LL′)]n} or [Li({N(R)C(Ph)}2CH)]2 { [Li(LL)]2} with magnesium bromide yielded the monomeric, crystalline magnesium complexes [Mg(LL′)2] 1 or [Mg(LL)2] 2, which have been structurally characterised; 1 has the magnesium atom in an unusual planar environment.