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1. Transfer Dehydrogenations of Alkanes and Related Reactions Using Iridium Pincer Complexes

Author

Bézier, David, Brookhart, Maurice, Beller, Matthias, Series editor, Dixneuf, Pierre H., Series editor, Dupont, Jairton, Series editor, Fürstner, Alois, Series editor, Glorius, Frank, Series editor, Gooßen, Lukas J., Series editor, Ikariya, Takao, Series editor, Nolan, Steven P., Series editor, Okuda, Jun, Series editor, Oro, Luis A., Series editor, Willis, Michael, Series editor, Zhou, Qi-Lin, Series editor, and Doucet, Henri, editor

Published
2016
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3. Oligomerization of Ethylene Using a Diphosphine Palladium Catalyst

Author

Bézier, David, Daugulis, Olafs, and Brookhart, Maurice

Abstract

The palladium diphosphine complex 4converts ethylene to hyperbranched unsaturated oligomers (Mn≈ 330 g/mol) at 22 °C. In addition to the high stability of this catalyst observed at temperatures up to 75 °C, an increase of the reaction temperature leads to a decrease in branching densities of the oligomers, in sharp contrast to the palladium and nickel diimine catalyst systems. One-pot oligomerizations/hydrogenations were carried out to form hyperbranched saturated oligomers.

Published
2024
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12. Iron-Catalyzed Hydrosilylation of Esters

Author

Bézier, David, primary, Venkanna, Gopaladasu T., additional, Castro, Luis C. Misal, additional, Zheng, Jianxia, additional, Roisnel, Thierry, additional, Sortais, Jean-Baptiste, additional, and Darcel, Christophe, additional

Published
2012
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19. An Efficient Iridium Catalyst for Reduction of Carbon Dioxide to Methane with Trialkylsilanes.

Author

Sehoon Park, Bézier, David, and Brookhart, Maurice

Subjects
*IRIDIUM catalysts, *CARBON dioxide reduction, *METHANE synthesis, *ALKYLSILANES, *HYDROSILYLATION
Abstract

Cationic silane complexes of general structure (POCOP)Ir(H)(HSiR3) {POCOP = 2,6-[OP- (tBu)2]2C6H3} catalyze hydrosilylations of CO2. Using bulky silanes results in formation of bis(silyl)acetals and methyl silyl ethers as well as sioxanes and CH4. Using less bulky silanes such as Me2or Me2PhSiH results in rapid formation of CH4 and sioxane with no detection of bis(silyl)acetal and methyl silyl ether intermediates. The catalyst system is long-lived, and 8300 turnovers can be achieved using Me2with a 0.0077 mol % loading of iridium. The proposed mechanism for the conversion of CO2 to CH4involves initial formation of the unobserved HCOOSiR3. This formate ester is then reduced sequentially to R3SiOCH2OSiR3, then R3SiOCH3, and finally to R3SiOSiR3 and CH4. [ABSTRACT FROM AUTHOR]

Published
2012
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