Synthesis and properties of alkaline metal complexes with new overcrowded β-diketiminato ligands
作者： Hirofumi Hamaki , Nobuhiro Takeda , Takayuki Yamasaki , Takahiro Sasamori , Norihiro Tokitoh
DOI: 10.1016/J.JORGANCHEM.2006.08.055
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摘要: Abstract Enaminoimines TbtNHC(Me)CHC(Me)NAr (5, Tbt = 2,4,6-[CH(SiMe3)2]3C6H2) bearing a Tbt group were synthesized by the two steps condensation of acetylacetone with bulky amines. 5 treated n-BuLi to give corresponding lithium β-diketiminates, [Li{TbtNHC(Me)CHC(Me)NAr}] (1). The X-ray structural analysis [Li{TbtNC(Me)CHC(Me)NMes}] (1c, Mes = mesityl) revealed that it is monomeric, solvent-free β-diketiminate. equilibrium between free 1c plus THF and THF-coordinated (1c · thf) was investigated in detail determination association constant (Ka) C6D6 at 293 K Job’s plot. heavier alkali metal complexes, sodium potassium β-diketiminates (6c–9c), prepared routes. [M{TbtNC(Me)CHC(Me)NMes}(thf)] (6c: M = Na. 7c: M = K) reaction 5c (Ar = Mes) MH (M = Na, K). Solvent-free [M{TbtNC(Me)CHC(Me)NMes}] (8c: 9c: t-BuOM
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