β-Diketiminate Stabilized Magnesium Hydroxide, Heterobimetallic, and Halide Complexes: Synthesis and X-ray Structural Studies

The controlled hydrolysis of heteroleptic magnesium amide, LMgN(SiMe3)(2) (L = CH[C(Me)N(2,6-iPr(2)C6H(3))](2)) with water afforded the corresponding hydroxide [LMg(OH)center dot THF](2) as air and moisture sensitive compound. The presence of a sterically bulky beta-diketiminate ligand prevents the self-condensation reaction of this hydroxide complex. Single crystal X-ray analysis shows that the hydroxide is dimeric in the solid state. Reaction of the magnesium amide or LMg(Me)center dot OEt2 with LAIMe(OH) generates the heterobimetallic species containing the Mg-O-Al moiety. Additionally, the reaction of methylmagnesiumchloride with the free ligand leads to complex L'MgCl (L' = CH[Et2NCH2CH2N(CMe)](2)). As revealed by the crystal structure, L'MgCl is a solvent free monomeric magnesium chloride complex that is analogues to the Grignard reagent.