首页> 外文期刊>Chemistry: A European journal >C_(sp~3)-H Bond Activation with Triel Metals: Indium and Gallium Zwitterions through Internal Hydride Abstraction in Rigid Salan Ligands
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C_(sp~3)-H Bond Activation with Triel Metals: Indium and Gallium Zwitterions through Internal Hydride Abstraction in Rigid Salan Ligands

机译:Triel金属的C_(sp〜3)-H键活化:刚性Salan配体中的内部氢化物提取引起的铟和镓两性离子

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摘要

The hydropyrimidine salan (salan=N,N'-dimethyl-N,N'-bis[(2-hydroxyphenyl)methylene]-1,2-diaminoethane) proteo-ligands with a rigid backbone {ON^(CH_2)^NO}H_2 react with M(CH_2SiMe_3)_3 (M=Ga, In) to yield the zwitterions {ON^(CH~+)^NO}M~-(CH_2SiMe_3)_2 (M=Ga, 2; In, 3) by abstraction of a hydride from the ligand backbone followed by elimination of dihydrogen. By contrast, with Al_2Me_6, the neutral-at-metal bimetallic complex [{ON^(CH_2)^NO}AlMe]_2 ([1]2) is obtained quantitatively. The formation of indium zwitterions is also observed with sterically more encumbered ligands containing o-Me substituents on the phenolic rings, or an N(CHPh)N moiety in the heterocyclic core. Overall, the ease of C_(sp~3)-H bond activation follows the order Al
机译:具有刚性骨架{ON ^(CH_2)^ NO}的氢嘧啶salan(salan = N,N'-二甲基-N,N'-双[(2-羟苯基)亚甲基] -1,2-二氨基乙烷)蛋白配体。 H_2通过抽象与M(CH_2SiMe_3)_3(M = Ga,In)反应生成两性离子{ON ^(CH〜+)^ NO} M〜-(CH_2SiMe_3)_2(M = Ga,2; In,3)从配体主链上除去氢化物,然后消除二氢。相反,利用Al_2Me_6,定量获得了中性金属双金属配合物[{ON ^(CH_2)^ NO} AlMe] _2([1] 2)。还观察到铟两性离子的形成,在空间上更妨碍在酚环上包含o-Me取代基或在杂环核心中包含N(CHPh)N部分的配体。总体而言,C_(sp〜3)-H键激活的难易程度遵循Al

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