Phosphanylalanes and Phosphanylgallanes Stabilized only by a Lewis Base

Phosphanylalanes and Phosphanylgallanes Stabilized only by a Lewis Base
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仅通过路易斯碱稳定的膦酰基丙烷和膦酰基镓烷

DOI:
10.1002/anie.201914046
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发表时间:
2020
期刊:
Angewandte Chemie (International Ed. in English)
影响因子:
--
通讯作者:
M. Scheer
M. Scheer
中科院分区:
--
文献类型:
--
作者:
M. A. K. Weinhart;A. S. Lisovenko;A. Y. Timoshkin;M. Scheer

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报道了第一个仅由刘易斯碱(LB)稳定的母体膦基丙二烷和膦基没食子烷的合成和表征。通过LiPCy 2与IDipp·GaH 2Cl反应,得到了相应的取代化合物IDipp·GaH 2 PCy 2(1)(IDipp= 1,3-双(2,6-二异丙基苯基)-咪唑啉-2-亚基)。然而,LB稳定的母体化合物IDipp <$GaH2PH2(3)和IDipp <$AlH2PH2(4)分别通过LiPH 2 <$DME与IDipp <$E′ H2 Cl(E′=Ga,Al)的盐复分解或通过IDipp <$E′H3(E′=Ga,Al)和PH 3的H2消除反应制备。化合物可以作为结晶固体分离并完全表征。支持DFT计算提供了深入了解反应途径以及这些化合物的稳定性与其分解行为。
The synthesis and characterization of the first parent phosphanylalane and phosphanylgallane stabilized only by a Lewis base (LB) are reported. The corresponding substituted compounds, such as IDipp⋅GaH2PCy2(1) (IDipp=1,3‐bis(2,6‐diisopropylphenyl)‐imidazolin‐2‐ylidene) were obtained by the reaction of LiPCy2with IDipp⋅GaH2Cl. However, the LB‐stabilized parent compounds IDipp⋅GaH2PH2(3) and IDipp⋅AlH2PH2(4) were prepared via a salt metathesis of LiPH2⋅DME with IDipp⋅E′H2Cl (E′=Ga, Al) or by H2‐elimination reactions of IDipp⋅E′H3(E′=Ga, Al) and PH3, respectively. The compounds could be isolated as crystalline solids and completely characterized. Supporting DFT computations gave insight into the reaction pathways as well as into the stability of these compounds with respect to their decomposition behavior.
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