Making Aromatic Phosphorus Heterocycles More Basic and Nucleophilic: Synthesis, Characterization and Reactivity of the First Phosphinine Selenide
作者:Friedrich Wossidlo、Daniel S. Frost、Jinxiong Lin、Nathan T. Coles、Katrin Klimov、Manuela Weber、Tobias Böttcher、Christian Müller
DOI:10.1002/chem.202102390
日期:2021.9.6
The synthesis and isolation of a phosphinine selenide was achieved for the first time by reacting red selenium with 2,6-bis(trimethylsilyl)phosphinine. The rather large coupling constant of 1JP,Se=883 Hz is in line with a P−Se bond of high s-character. The σ-electron donating Me3Si-substituents significantly increase the energy of the phosphorus lone pair and hence its basicity, making the heterocycle
通过红硒与2,6-双(三甲基甲硅烷基)膦的反应,首次实现了硒化膦的合成和分离。1 J P,Se =883 Hz的相当大的耦合常数符合高s 特性的 P-Se 键。提供 σ 电子的 Me 3 Si 取代基显着增加了磷孤对电子的能量,从而增加了它的碱性,使杂环比未取代的膦 C 5 H 5更具碱性和亲核性P,由计算的气相碱度证实。NBO 计算进一步表明,硒原子的孤对通过供体 - 受体与芳环的反键轨道相互作用而稳定。新颖phosphinine硒节目向六氟-2-丁炔的独特反应性,金(I)氯,以及我PrOH中。我们的结果为低配位磷化学的新视角铺平了道路。
Borane Adducts of Aromatic Phosphorus Heterocycles: Synthesis, Crystallographic Characterization and Reactivity of a Phosphinine‐B(C
<sub>6</sub>
F
<sub>5</sub>
)
<sub>3</sub>
Lewis Pair
作者:Jinxiong Lin、Friedrich Wossidlo.、Nathan T. Coles、Manuela Weber、Simon Steinhauer、Tobias Böttcher、Christian Müller
DOI:10.1002/chem.202104135
日期:2022.2
Roll out the barrelene: The synthesis and crystallographic characterization of a phosphinine–borane adduct has been achieved for the first time. The novel Lewis adduct shows rapid insertion and [4+2] cycloaddition reactivity towards phenylacetylene, whereas a hitherto unknown dihydro-1-phosphabarrelene is formed with styrene. Reaction with an ester provides a new, facile and selective route to 1-R-phosphininium
Intramolecular [4 + 2] Diels-Alder Cycloadditions of 2-Substituted Phosphabenzene and Arsabenzene in Triosmium Clusters
作者:Alejandro J. Arce、Antony J. Deeming、Ysaura De Sanctis、Ana M. Garcia、Jorge Manzur、Evgenia Spodine
DOI:10.1021/om00021a003
日期:1994.9
2-(Trimethylsilyl)-1-phosphabenzene and -1-arsabenzene, Me(3)SiC(5)H(4)E (E = P, AS), react with [Os3H2(CO)(10)] to give the clusters [Os3H2(Me(3)SiC(5)H(4)E)(CO)(9)], which contain sigma-bonded, four-electron-donating mu 3-heterocyclic ligands, and the products [Os3H(Me(3)Si)(2)C(10)H(9)E(2)}(CO)(9)], having tricyclic mu(3)-ligands derived from [4 + 2] Diels-Alder cycloadditions.