Wilson Daniel W N, Feld Joey, Goicoechea Jose M
Department of Chemistry, University of Oxford, Chemistry Research Laboratory, 12 Mansfield Road, Oxford, OX1 3TA, UK.
Angew Chem Int Ed Engl. 2020 Nov 16;59(47):20914-20918. doi: 10.1002/anie.202008207. Epub 2020 Sep 9.
Phosphagallenes (1 a/1 b) featuring double bonds between phosphorus and gallium were synthesized by reaction of (phosphanyl)phosphaketenes with the gallium carbenoid Ga(Nacnac) (Nacnac=HC[C(Me)N(2,6-i-Pr C H )] ). The stability of these species is dependent on the saturation of the phosphanyl moiety. 1 a, which bears an unsaturated phosphanyl ring, rearranges in solution to yield a spirocyclic compound (2) which contains a P=P bond. The saturated variant 1 b is stable even at elevated temperatures. 1 b behaves as a frustrated Lewis pair capable of activation of H and forms a 1:1 adduct with CO .
通过（膦基）磷杂环丁二烯与镓卡宾Ga（Nacnac）（Nacnac = HC[C（Me）N（2,6-i-Pr₂C₆H₃）]₂）反应合成了磷与镓之间具有双键的磷杂烯（1 a/1 b）。这些物种的稳定性取决于膦基部分的饱和度。带有不饱和膦基环的1 a在溶液中重排生成含有P=P键的螺环化合物（2）。饱和变体1 b即使在高温下也很稳定。1 b表现为能够活化H₂的受阻路易斯对，并与CO₂形成1:1加合物。
