Heterolytic activation of hydrogen using frustrated Lewis pairs containing tris(2,2′,2"-perfluorobiphenyl)borane

被引：29

作者：

Binding, Samantha C. ^{[1
]}

Zaher, Hasna ^{[1
]}

Chadwick, F. Mark ^{[1
]}

O'Hare, Dermot ^{[1
]}

机构：

[1] Univ Oxford, Inorgan Chem Lab, Oxford OX1 3QR, England

来源：

DALTON TRANSACTIONS | 2012年 / 41卷 / 30期

关键词：

FREE CATALYTIC-HYDROGENATION; X-RAY-DIFFRACTION; METAL-FREE; DIHYDROGEN ACTIVATION; CARBON-DIOXIDE; ROOM-TEMPERATURE; H-2; ACTIVATION; BORANE; REACTIVITY; B(C6F5)(3);

D O I：

10.1039/c2dt30334e

中图分类号：

O61 [无机化学];

学科分类号：

070301 ; 081704 ;

摘要：

The extremely sterically hindered borane tris(2,2',2 ''-perfluorobiphenyl)borane (PBB) has been structurally characterised. In combination with bulky nitrogen bases, it forms the 'frustrated Lewis pairs' (FLPs) PBB/2,2,6,6-tetramethylpiperidine (TMP) (1), PBB/1,4-diazobicyclo[2.2.2]-octane (DABCO) (2) and PBB/2,6-lutidine (lut) (3). These novel, unquenched acid-base pairs have been shown to effect facile room temperature heterolytic cleavage of dihydrogen to form the ammonium borate salts [2,2,6,6-Me4C5H6NH2][HB(C12F9)(3)] (4) and [N(C2H4)(3)NH][HB(C12F9)(3)] (5), and lutidinium borate [2,6-Me2C5H3NH][HB(C12F9)(3)] (6). Although these reactions are equilibria, the reverse reaction and release of hydrogen gas was not apparent at temperatures up to 120 degrees C. The relative Lewis acidity of PBB has been determined using the Gutmann-Beckett method.

引用

页码：9061 / 9066

页数：6

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