Hydride Abstraction and Deprotonation – an Efficient Route to Low Coordinate Phosphorus and Arsenic Species
作者:Laurence J. Taylor、Michael Bühl、Piotr Wawrzyniak、Brian A. Chalmers、J. Derek Woollins、Alexandra M. Z. Slawin、Amy L. Fuller、Petr Kilian
DOI:10.1002/ejic.201500948
日期:2016.2
Ph3C·BF4 resulted in hydride abstraction to give [Acenap(PiPr2)(EH)][BF4] (2a, E = As; 2b, E = P). These represent the first structurally characterised phosphino/arsino-phosphonium salts with secondary arsine/phosphine groups, as well as the first example of a Lewis base stabilised primary arsenium cation. Compounds 2a and 2b were deprotonated with NaH to afford low coordinate species Acenap(PiPr2)(E)
用 Ph3C·BF4 处理 Acenap(PiPr2)(EH2)(Acenap = acenaphthene-5,6-diyl; 1a, E = As; 1b, E = P)导致氢化物提取得到 [Acenap(PiPr2)(EH) ][BF4] (2a, E = As; 2b, E = P)。这些代表了第一个结构表征的具有仲胂/膦基团的膦基/胂-鏻盐,以及路易斯碱稳定的伯砷阳离子的第一个例子。化合物 2a 和 2b 用 NaH 去质子化,得到低配位物质 Acenap(PiPr2)(E)(3a,E = As;3b,E = P)。这为亚芳基-σ4-正膦 3b 提供了一种替代且实用的合成途径,并提供了对亚芳基-σ4-正膦 3a 形成的机理见解,间接支持了先前报道的 1a 脱氢通过离子机制发生的假设。