An Ylide-like Phosphasilene and Striking Formation of a 4π-Electron, Resonance-Stabilized 2,4-Disila-1,3-diphosphacyclobutadiene

被引：88

作者：

Inoue, Shigeyoshi ^{[1
]}

Wang, Wenyuan ^{[1
]}

Praesang, Carsten ^{[1
]}

Asay, Matthew ^{[1
]}

Irran, Elisabeth ^{[1
]}

Driess, Matthias ^{[1
]}

机构：

[1] Tech Univ Berlin, Inst Chem Metalorgan & Inorgan Mat, D-10623 Berlin, Germany

来源：

JOURNAL OF THE AMERICAN CHEMICAL SOCIETY | 2011年 / 133卷 / 09期

关键词：

INDEPENDENT CHEMICAL-SHIFTS; X-RAY-STRUCTURE; SILICON-PHOSPHORUS; DOUBLE-BONDS; AROMATICITY; REACTIVITY; ARSANES; NICS;

D O I：

10.1021/ja200462y

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

The first N-donor-stabilized phosphasilene LSi(SiMe3)=PSiMe3 (L = PhC(NtBu)(2)) has been synthesized in 87% yield through 1,2-silyl migration of the (Me3Si)(2)P-substituted, N-heterocyclic silylene [LSi-P-(SiMe3)(2)]. Remarkably, the latter reacts with dichlorotri-phenylphosphorane Ph3PCl2 to give the unprecedented 4 pi-electron Si2P2-cycloheterobutadiene [(LSi)(2)P-2] with two-coordinate phosphorus atoms. The striking molecular structures as well as the Si-29 and P-31 NMR spectroscopic features of both products indicate the presence of zwitterionic Si=P bonds which is also in accordance with results by DFT calculations.

引用

页码：2868 / 2871

页数：4

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