Mechanistic features of iridium pincer complex catalyzed hydrocarbon dehydrogenation reactions:: Inhibition upon formation of a μ-dinitrogen complex

被引：131

作者：

Lee, DW

Kaska, WC

Jensen, CM ^{[1
]}

机构：

[1] Univ Hawaii, Dept Chem, Honolulu, HI 96822 USA

[2] Univ Calif Santa Barbara, Dept Chem, Santa Barbara, CA 93106 USA

来源：

ORGANOMETALLICS | 1998年 / 17卷 / 01期

关键词：

D O I：

10.1021/om9707679

中图分类号：

O61 [无机化学];

学科分类号：

070301 ; 081704 ;

摘要：

Deuterium-labeling studies show that vinyl C-H oxidative addition of tert-butylethylene (tbe) to IrH2{C6H3-2,6-(CH2PBu2t)(2)} (1) is rapid and reversible, while the stoichiometric hydrogenation of tbe by I is slower and irreversible. The dinitrogen complex, [Ir{C6H3-2,6-(CH2PBu2t)(2)}](2)(mu L-N-2) (3), results from the reaction of 1 with excess tbe under 1 atm of nitrogen. A single-crystal X-ray structure determination of 3 reveals a perpendicular arrangement of the P-C-P pincer ligands, which accounts for the surprising stability of 3 and the inhibiting effect of nitrogen on reactions catalyzed by 1.

引用

页码：1 / 3

页数：3

共 23 条

[1] HOMOGENEOUS TUNGSTEN, RHENIUM, AND IRIDIUM CATALYSTS IN ALKANE DEHYDROGENATION DRIVEN BY REFLUX OF SUBSTRATE OR OF COSOLVENT OR BY INERT-GAS FLOW [J].