Full Paper Acceleration of the Rate of the Heck Reaction through UV- and Visible-Light-Induced Palladium(II)
Reduction
Margaret Anne Fredricks, Markus Drees and Klaus Köhler
DOI: 10.1002/cctc.201000137
The speed of light: UV and visible light increase the rate of the Heck reaction with homogeneous and
heterogeneous PdII catalysts precursors. PdII reduction is significantly faster (minutes versus hours) under light
irradiation than in the dark and the same species are active with and without irradiation. These species include Pd
halides, which can undergo PdII reduction, as shown by DFT calculations and UV/Vis spectroscopy.
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Full Paper A Covalently Immobilized Triphenylphosphine Rhodium Complex: Synthesis, Characterization, and
Application in Catalytic Olefin Hydrogenation
Lei Wang, Mingjun Jia, Sankaranarayanapillai Shylesh, Thomas Philippi, Andreas Seifert, Stefan Ernst, Anand
Pal Singh and Werner R. Thiel
DOI: 10.1002/cctc.201000133
Covalently grafting a trimethoxysilane functionalized triphenylphosphine rhodium(I) complex to the silica surface
of a mesoporous SBA-15 support gives a highly active, selective, stable, and recyclable catalyst for olefin
hydrogenation.
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Communication Thermal Activation of Methane by Diatomic Metal Oxide Radical Cations: PbO+ as One of the
Missing Pieces
Xinhao Zhang and Helmut Schwarz
DOI: 10.1002/cctc.201000259
Missing in action: Based on the high computed hydrogen atom affinities and the oxygen-centered radical
characters, group IVA metal monoxide radical cations are predicted to be the missing pieces in the thermal
activation of methane, and combined experimental and computational studies show that the group IVA metal
oxide PbO+ is indeed capable of abstracting a hydrogen atom from methane at room temperature.
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