Structure and Dynamic Features of an Intramolecular Frustrated Lewis Pair

被引：90

作者：

Axenov, Kirill V. ^{[1
]}

Moemming, Cornelia M. ^{[1
]}

Kehr, Gerald ^{[1
]}

Froehlich, Roland ^{[1
]}

Erker, Gerhard ^{[1
]}

机构：

[1] Univ Munster, Inst Organ Chem, D-48149 Munster, Germany

来源：

CHEMISTRY-A EUROPEAN JOURNAL | 2010年 / 16卷 / 47期

关键词：

boron; frustrated Lewis pairs; hydrogen; phosphorus; FREE CATALYTIC-HYDROGENATION; HETEROLYTIC DIHYDROGEN ACTIVATION; METAL-FREE; BORANE; REACTIVITY; IMINES; H-2; BIS(PENTAFLUOROPHENYL)BORANE; PHOSPHINES; REDUCTION;

D O I：

10.1002/chem.201001814

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

Di(mesityl)cyclohexenylphosphine undergoes hydroboration with Piers' borane [HB(C6F5)(2)] to yield the cyclohexylene-anellated frustrated Lewis pair 5. This P/B pair splits H-2 with the formation of the product 4 and adds to the C=O double bond of phenyl isocyanate to yield 6. In the crystal, compound 5 features a puckered four-membered heterocyclic core structure with a long P B bond (ay. 2.197(5) angstrom). The activation energy of the P B cleavage of the frustrated Lewis pair 5 was determined by dynamic F-19 NMR spectroscopy at Delta G(not equal) (298 K) = 12.1 +/- 0.3 kcal mol(-1).

引用

页码：14069 / 14073

页数：5

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