Metallation of 2,2,6,6-tetramethylpiperidine, HN[CMe2CH2]2CH2(HL), by H3AlNMe3 in diethyl ether affords a monomeric, Lewis base-stabilised amidoalane Me3NAIH2L, 1[AlâNamido, Namine 1.838(2), 2.058(2)Ã
], whereas treating AIH3 generated in situ with the same amine in diethyl ether yields a remarkably stable secondary amine adduct of alane H3Al(HL), 2(decomp. > 115 °C), also as a monomer in the solid [AlâNHL 2.04(1)Ã
].
在
乙醚中,
2,2,6,6-四甲基哌啶(HN[CMe2CH2]2CH2(HL))与H3AlNMe3进行
金属化反应,得到单体的路易斯碱稳定
氨基铝烷Me3NAIH2L,1[Al–Namido, Namine 1.838(2), 2.058(2) Å];而在
乙醚中,与同一
氨基反应生成的AIH3则形成稳定性极高的次
氨基铝烷加合物H3Al(HL),2(分解温度> 115 °C),固态中也是单体形式[Al–NHL 2.04(1) Å]。