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Jiliang Zhou Liu Leo Liu Levy L. Cao Douglas W. Stephan 《Angewandte Chemie (Weinheim an der Bergstrasse, Germany)》2019,131(16):5461-5466
Double chloride abstraction of Cp*AsCl2 gives the dicationic arsenic species [(η5‐Cp*)As(tol)][B(C6F5)4]2 ( 2 ) (tol=toluene). This species is shown to exhibit Lewis super acidity by the Gutmann–Beckett test and by fluoride abstraction from [NBu4][SbF6]. Species 2 participates in the FLP activation of THF affording [(η2‐Cp*)AsO(CH2)4(THF)][B(C6F5)4]2 ( 5 ). The reaction of 2 with PMe3 or dppe generates [(Me3P)2As][B(C6F5)4] ( 6 ) and [(σ‐Cp*)PMe3][B(C6F5)4] ( 7 ), or [(dppe)As][B(C6F5)4] ( 8 ) and [(dppe)(σ‐Cp*)2][B(C6F5)4]2 ( 9 ), respectively, through a facile cleavage of C?As bonds, thus showcasing unusual reactivity of this unique As‐containing compound. 相似文献
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