Synthese eines funktionalen Aluminiumalkinids, Me3C‐C≡C‐AlBr2, und dessen Reaktionen mit der sperrigen Lithiumverbindung LiCH(SiMe3)2

Synthese eines funktionalen Aluminiumalkinids, Me3C‐C≡C‐AlBr2, und dessen Reaktionen mit der sperrigen Lithiumverbindung LiCH(SiMe3)2
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合成功能性铝基化合物、Me3C-C=C-AlBr2,并通过锂结合 LiCH(SiMe3)2 进行反应

DOI:
10.1002/zaac.200600044
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发表时间:
2006
期刊:
Zeitschrift für anorganische und allgemeine Chemie
影响因子:
--
通讯作者:
Madhat Matar
Madhat Matar
中科院分区:
--
文献类型:
--
作者:
W. Uhl;Elif Er;Madhat Matar

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功能性炔化铝Me 3C-C_xC-AlBr_2的合成及其与大体积锂化合物巫妖(SiMe_3)_2的反应 三溴化铝与炔化锂(Li)C = C-CMe 3反应,得到炔化铝Me 3C-C = C-AlBr 2(1),产率几乎为定量。1的晶体具有三聚体式单元,其具有Al 3C 3杂环和在桥接位置的炔基基团的阴离子碳原子。在溶液中测定了动态平衡,该溶液可能包含三聚体和二聚体式单元。1与1当量的巫妖(SiMe 3)2反应得到化合物[Me 3 C-C = C-Al(Br)-CH(SiMe 3)2]2(2),其是通过Al-C-Al桥的二聚体。两当量的锂化合物得到四种主要产物的混合物,其可被鉴定为2,Li[Me 3C-C = C-Al{CH(SiMe 3)2}3](3)、Me 3C-C = C-Al[CH(SiMe 3)2]2(4)和Al[CH(SiMe 3)2]3。3的锂原子通过C = C三键和一个双(三甲基甲硅烷基)甲基的内部碳原子配位。进一步观察到甲基的C-H键的相互作用。
Synthesis of a Functional Aluminium Alkynide, Me3C-C≡C-AlBr2, and its Reactions with the Bulky Lithium Compound LiCH(SiMe3)2 Treatment of aluminium tribromide with the lithium alkynide (Li)C≡C-CMe3 afforded the aluminium alkynide Me3C-C≡C-AlBr2 (1) in an almost quantitative yield. 1 crystallizes with trimeric formula units possessing Al3C3 heterocycles and the anionic carbon atoms of the alkynido groups in the bridging positions. A dynamic equilibrium was determined in solution which probably comprises trimeric and dimeric formula units. Reaction of 1 with one equivalent of LiCH(SiMe3)2 yielded the compound [Me3C-C≡C-Al(Br)-CH(SiMe3)2]2 (2), which is a dimer via Al-C-Al bridges. Two equivalents of the lithium compound gave a mixture of four main-products, which could be identified as 2, Li[Me3C-C≡C-Al{CH(SiMe3)2}3] (3), Me3C-C≡C-Al[CH(SiMe3)2]2 (4), and Al[CH(SiMe3)2]3. The lithium atom of 3 is coordinated by the C≡C triple bond and an inner carbon atom of one bis(trimethylsilyl)methyl group. Further interactions were observed to C-H bonds of methyl groups.