Max-Planck-Institut für Kohlenforschung, Kaiser-Wilhelm-Platz 1, D-45470 Mülheim an der Ruhr, Germany.
J Am Chem Soc. 2011 Dec 28;133(51):20758-60. doi: 10.1021/ja210223s. Epub 2011 Dec 2.
Carbene-stabilized L(3)P cations have been synthesized for the first time by a reaction between 1-chloro-2,3-bis(dialkylamino)cyclopropenium salts and P(SiMe(3))(3). In addition, the first structural characterization of such an entity is reported. Consistent with the X-ray data, density functional calculations indicate that these P-centered cations, despite their high positive charge, still feature a nonbonding electron pair on the P-atom (HOMO) and a very low-lying LUMO depicting them as poor σ-donors and excellent π-acceptors.
卡宾稳定的 L(3)P 阳离子首次通过 1-氯-2,3-双(二烷基氨基)环丙烯翁盐与 P(SiMe(3))(3)之间的反应合成。此外，还首次报道了这种实体的结构特征。与 X 射线数据一致，密度泛函计算表明，尽管这些 P 中心阳离子带有很高的正电荷，但 P 原子上仍具有孤对电子（HOMO）和一个非常低的 LUMO，这表明它们是较差的 σ 供体和极好的 π 受体。
