New Strategies to Phosphino-Phosphonium Cations and Zwitterions

被引：47

作者：

Geier, Stephen J. ^{[1
]}

Dureen, Meghan A. ^{[1
]}

Ouyang, Eva Y. ^{[1
]}

Stephan, Douglas W. ^{[1
]}

机构：

[1] Univ Toronto, Dept Chem, Toronto, ON M5S 3H6, Canada

来源：

CHEMISTRY-A EUROPEAN JOURNAL | 2010年 / 16卷 / 03期

基金：

加拿大自然科学与工程研究理事会;

关键词：

alkyne activation; hydrogen activation; main group elements; phosphino-phosphonium; phosphorus; zwitterions; FRUSTRATED LEWIS PAIRS; HETEROLYTIC DIHYDROGEN ACTIVATION; SYNTHETIC APPROACH; P BONDS; REACTIVITY; COMPLEXES; CARBENE; COORDINATION; CHEMISTRY; BORANE;

D O I：

10.1002/chem.200902369

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

By employing strategies based on frustrated Lewis pair chemistry, new routes to phosphino-phosphonium cations and zwitterions have been developed. B(C6F5)(3) is shown to react with H-2 and P(2)tBu(4) to effect heterolytic hydrogen activation yielding the phosphino-phosphonium borate salt [(tBu(2)P)PHtBu(2)] [HB(C6F5)(3)] (1). Alternatively, alkenylphosphino-phosphonium borate zwitterions are accessible by reaction of B(C6F5)(3) and PhC CH with P2Ph4, P4Cy4, or P5Ph5 affording the species [(Ph2P)P(Ph)(2)C(Ph)=C(H)B(C6F5)(3)] (2), [(P3Cy3)P(Cy)-C(Ph)=C(H)B(C6F5)(3)] (3), and [(P4Ph4)P(Ph)C(Ph)=C(H)B(C6F5)(3)] (4). A related phosphino-phosphonium borate species-[(Ph4P4)P(Ph)C6F4B-(F)(C6F5)(2)] (5) is also isolated from the thermolysis of B(C6F5)(3) and P5Ph5.

引用

页码：988 / 993

页数：6

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