Tridentate Lewis Acids Based on 1,3,5-Trisilacyclohexane Backbones and an Example of Their Host-Guest Chemistry.
Tridentate Lewis Acids Based on 1,3,5-Trisilacyclohexane Backbones and an Example of Their Host-Guest Chemistry.
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基于 1,3,5-三硅杂环己烷主链的三齿路易斯酸及其主客体化学示例
DOI:
10.1002/chem.201501683
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发表时间:
2015
期刊:
影响因子:
--
通讯作者:
N. W. Mitzel
中科院分区:
文献类型:
--
作者:
E. Weisheim;C. G. Reuter;P. Heinrichs;Y. V. Vishnevskiy;A. Mix;B. Neumann;H.-G. Stammler;N. W. Mitzel
Directed tridentate Lewis acids based on the 1,3,5‐trisilacyclohexane skeleton with three ethynyl groups [CH2Si(Me)(C2H)]3were synthesised and functionalised by hydroboration with HB(C6F5)2, yielding the ethenylborane {CH2Si(Me)[C2H2B(C6F5)2]}3, and by metalation with gallium and indium organyls affording {CH2Si(Me)[C2M(R)2]}3(M=Ga, In, R=Me, Et). In the synthesis of the backbone the influence of substituents (MeO, EtO andiPrO groups at Si) on the orientation of the methyl group was studied with the aim to increase the abundance of the all‐cisisomer. New compounds were identified by elemental analyses, multi‐nuclear NMR spectroscopy and in some cases by IR spectroscopy. Crystal structures were obtained forcis‐trans‐[CH2Si(Me)(Cl)]3, all‐cis‐[CH2Si(Me)(H)]3, all‐cis‐[CH2Si(Me)(C2H)]3,cis‐trans‐[CH2Si(Me)(C2H)]3and all‐cis‐[CH2Si(Me)(C2SiMe3)]3. A gas‐phase electron diffraction experiment for all‐cis‐[CH2Si(Me)(C2H)]3provides information on the relative stabilities of the all‐equatorial and all‐axial form; the first is preferred in both solid and gas phase. The gallium‐based Lewis acid {CH2Si(Me)[C2Ga(Et)2]}3was reacted with a tridentate Lewis base (1,3,5‐trimethyl‐1,3,5‐triazacyclohexane) in an NMR titration experiment. The generated host–guest complexes involved in the equilibria during this reaction were identified by DOSY NMR spectroscopy by comparing measured diffusion coefficients with those of the suitable reference compounds of same size and shape.
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DOI:
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发表时间:
2004
期刊:
影响因子:
--
作者:
V. A. Sipachev
通讯作者:
V. A. Sipachev
影响因子:
--
作者:
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DOI:
10.1002/chin.200411258
发表时间:
2003-12
期刊:
ChemInform
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--
作者:
M. Oestereich;U. Schmid;G. Auer;M. Keller
通讯作者:
M. Oestereich;U. Schmid;G. Auer;M. Keller
影响因子:
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作者:
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通讯作者:
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DOI:
--
发表时间:
1987
期刊:
影响因子:
--
作者:
R. Tacke;J. Pikies;Haryanto Linoh;R. Rohr‐Aehle;S. Gönne
通讯作者:
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