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首页> 外文期刊>Dalton transactions: An international journal of inorganic chemistry >NHC-coordinated silagermenylidene functionalized in allylic position and its behaviour as a ligand?
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NHC-coordinated silagermenylidene functionalized in allylic position and its behaviour as a ligand?

机译:NHC配位的烯丙烯基官能团在烯丙基位置上的功能及其作为配体的行为?

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摘要

Vinylidenes are common in transition metal chemistry with catalytic applications in alkene and alkyne metathesis. We report here the isolation of a heavier analogue of vinylidene, an α-chlorosilyl functionalized silagermenylidene stabilized by an N-heterocyclic carbene (NHC). Silagermenylidene (Tip_2Cl)Si- (Tip)SivGe·NHC~(iPr_2Me_2) (4-E/Z; Tip = 2,4,6-~iPr_3C_6H_2; NHC~(iPr_2Me_2) = 1,3-diisopropyl-4,5-dimethylimidazol- 2-ylidene) is available as an E/Z-equilibrium mixture from Tip2SivSi(Tip)Li and NHC~(iPr_2Me_2)·GeCl_2. Reaction of 4-E/Z with Fe2(CO)9 affords a silagermenylidene Fe(CO)_4 complex, which slowly isomerizes to its E-isomer at 25 °C. A rearranged Fe(CO)_3 complex with an allylic SiGeSi ligand is obtained as a side product at 65 °C.
机译:亚乙烯基在过渡金属化学中很常见,在烯烃和炔烃复分解中具有催化作用。我们在这里报告了偏亚乙烯基的较重类似物的分离,后者是由N-杂环卡宾(NHC)稳定的α-氯甲硅烷基官能化的亚苄基亚乙烯基。 age烯(Tip_2Cl)Si-(Tip)SivGe·NHC〜(iPr_2Me_2)(4-E / Z;尖端= 2,4,6-〜iPr_3C_6H_2; NHC〜(iPr_2Me_2)= 1,3-二异丙基-4,5-可以从Tip2SivSi(Tip)Li和NHC〜(iPr_2Me_2)·GeCl_2中以E / Z平衡混合物形式获得二甲基咪唑(2-亚甲基)。 4-E / Z与Fe2(CO)9的反应提供了一个亚硅烷基亚铁Fe(CO)_4配合物,该配合物在25°C时缓慢异构化为其E-异构体。在65℃下获得了具有烯丙基SiGeSi配体的重排的Fe(CO)_3配合物作为副产物。

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