Highly selective dehydrogenative silylation of alkenes catalyzed by rhenium complexes

Jiang, Yanfeng; Blacque, Olivier; Fox, Thomas; Frech, Christian M.; Berke, Heinz

doi:10.1002/chem.200802019

Publication type:	Article in scientific journal
Type of review:	Peer review (publication)
Title:	Highly selective dehydrogenative silylation of alkenes catalyzed by rhenium complexes
Authors:	Jiang, Yanfeng Blacque, Olivier Fox, Thomas Frech, Christian M. Berke, Heinz
DOI:	10.1002/chem.200802019
Published in:	Chemistry - A European Journal
Volume(Issue):	15
Issue:	9
Page(s):	2121
Pages to:	2128
Issue Date:	2009
Publisher / Ed. Institution:	Wiley
ISSN:	0947-6539 1521-3765
Language:	English
Subject (DDC):	540: Chemistry
Abstract:	Choosy chemicals: Rhenium(I) complexes of type [ReBr(2)(L)(NO)(PR(3))(2)] (L=H(2) (1), CH(3)CN (2), ethylene (3); R=iPr (a), cyclohexyl (b)) proved to be suitable catalyst precursors for the highly selective dehydrogenative silylation of alkenes. Two types of rhenium(I) hydride species, [ReBrH(NO)(PR(3))(2)] (4) and [ReBr(eta(2)-CH(2)=CHR(1))H(NO)(PR(3))(2)] (5), were found in the [ReBr(2)(L)(NO)(PR(3))(2)]-catalyzed dehydrogenative silylation of alkenes.Rhenium(I) complexes of type [ReBr(2)(L)(NO)(PR(3))(2)] (L=H(2) (1), CH(3)CN (2), and ethylene (3); R=iPr (a) and cyclohexyl (Cy; b)) catalyze dehydrogenative silylation of alkenes in a highly selective manner to yield silyl alkenes and the corresponding alkanes. Hydrosilylation products appear only rarely depending on the type of olefinic substituent, and if they do appear then it is in very minor amounts. Mechanistic studies showed that two rhenium(I) hydride species of type [ReBrH(NO)(PR(3))(2)] (R=iPr (4 a) and Cy (4 b)) and [ReBr(eta(2)-CH(2)=CHR(1))H(NO)(PR(3))(2)] (R(1)=p-CH(3)C(6)H(4), R=iPr (5 a), Cy (5 b); R(1)=H, R=iPr (5 a'), Cy (5 b')) are involved in the initiation pathway of the catalysis. The rate-determining steps of the catalytic cycle are the phosphine dissociation from complexes of type 5 and the reductive eliminations to form the alkane components. The catalytic cycle implies that the given rhenium systems have the ability to activate C-H and Si-H bonds through the aid of a facile redox interplay of Re(I) and Re(III) species. The molecular structures of 4 b and 5 a were established by means of X-ray diffraction studies.
URI:	https://digitalcollection.zhaw.ch/handle/11475/10478
Fulltext version:	Published version
License (according to publishing contract):	Licence according to publishing contract
Departement:	Life Sciences and Facility Management
Appears in collections:	Publikationen Life Sciences und Facility Management

Files in This Item:

There are no files associated with this item.

Show full item record

Jiang, Y., Blacque, O., Fox, T., Frech, Christian M., & Berke, H. (2009). Highly selective dehydrogenative silylation of alkenes catalyzed by rhenium complexes. Chemistry - A European Journal, 15(9), 2121–2128. https://doi.org/10.1002/chem.200802019

Jiang, Y. et al. (2009) ‘Highly selective dehydrogenative silylation of alkenes catalyzed by rhenium complexes’, Chemistry - A European Journal, 15(9), pp. 2121–2128. Available at: https://doi.org/10.1002/chem.200802019.

Y. Jiang, O. Blacque, T. Fox, Christian M. Frech, and H. Berke, “Highly selective dehydrogenative silylation of alkenes catalyzed by rhenium complexes,” Chemistry - A European Journal, vol. 15, no. 9, pp. 2121–2128, 2009, doi: 10.1002/chem.200802019.

JIANG, Yanfeng, Olivier BLACQUE, Thomas FOX, Christian M. FRECH und Heinz BERKE, 2009. Highly selective dehydrogenative silylation of alkenes catalyzed by rhenium complexes. Chemistry - A European Journal. 2009. Bd. 15, Nr. 9, S. 2121–2128. DOI 10.1002/chem.200802019

Jiang, Yanfeng, Olivier Blacque, Thomas Fox, Christian M. Frech, and Heinz Berke. 2009. “Highly Selective Dehydrogenative Silylation of Alkenes Catalyzed by Rhenium Complexes.” Chemistry - A European Journal 15 (9): 2121–28. https://doi.org/10.1002/chem.200802019.

Jiang, Yanfeng, et al. “Highly Selective Dehydrogenative Silylation of Alkenes Catalyzed by Rhenium Complexes.” Chemistry - A European Journal, vol. 15, no. 9, 2009, pp. 2121–28, https://doi.org/10.1002/chem.200802019.