نتایج جستجو برای: rhodium

تعداد نتایج: 4139  

2017
J. A. Hlina J. A. L. Wells J. R. Pankhurst Jason B. Love P. L. Arnold

The heterotetra- and bimetallic uranium(iv)-rhodium(i) complexes [UIVI2(μ-OArP-1κ1O,2κ1P)2RhI(μ-I)]2 (2) (ArPO- = 2-(diphenylphosphino)-6-tert-butyl-4-methylphenoxide) and UIVI(μ-I)(μ-OArP-1κ1O,2κ1P)3RhI (3) were prepared by treatment of UIVI(OArP-κ2O,P)3 (1) with rhodium(i) iodide olefin complexes. The reaction of 1 with the monodentate cyclooctene (coe) rhodium(i) precursor [(coe)2RhII]2 give...

2014
Anna B Kroner Mark A Newton Moniek Tromp Otello M Roscioni Andrea E Russell Andrew J Dent Carmelo Prestipino John Evans

The effects of ceria and zirconia on the structure-function properties of supported rhodium catalysts (1.6 and 4 wt % Rh/γ-Al2O3) during CO exposure are described. Ceria and zirconia are introduced through two preparation methods: 1) ceria is deposited on γ-Al2O3 from [Ce(acac)3] and rhodium metal is subsequently added, and 2) through the controlled surface modification (CSM) technique, which i...

Journal: :Chemical communications 2010
Azusa Kondoh Timothy F Jamison

A rhodium-catalyzed dehydrogenative borylation of cyclic alkenes is described. This reaction provides direct access to cyclic 1-alkenylboronic acid pinacol esters, useful intermediates in organic synthesis. Suzuki-Miyaura cross-coupling applications are also presented.

Journal: :Chemical communications 2013
Stephanie J Lucas Benjamin D Crossley Alan J Pettman Antony D Vassileiou Thomas E O Screen A John Blacker Patrick C McGowan

This paper provides a viable, reproducible and robust method for immobilising hydroxyl tethered iridium-rhodium complexes. The materials have been shown to be both effective and recyclable in the process of catalytic transfer hydrogenation with minimal metal leaching.

Journal: :Dalton transactions 2007
Miguel Rubio Andrés Suárez Diego del Río Agustín Galindo Eleuterio Alvarez Antonio Pizzano

Square-planar ethylene rhodium derivatives bearing pincer diphosphite ligands have been prepared and characterized, they display a rare in-plane coordination which, based on DFT calculations, has been mainly attributed to steric effects.

Journal: :The Journal of organic chemistry 2003
Alexei V Novikov Abigail R Kennedy Jon D Rainier

The coupling of rhodium carbenoids from vinyl diazoacetates with 2-thio-3-alkyl indoles was found to generate C(3) quaternary substituted indolines via a thionium ylide-initiated [3,3]-sigmatropic rearrangement.

Journal: :Chemical communications 2010
Takahiro Nishimura Takahiro Sawano Sumito Tokuji Tamio Hayashi

Asymmetric addition of (triisopropylsilyl)acetylene to nitroalkenes took place in the presence of a rhodium/chiral bisphosphine catalyst to give beta-alkynylated nitroalkanes in high yields with high enantioselectivity.

Journal: :Chemical communications 2014
Huanhuan Li Yang Wang Kai Yuan Ye Tao Runfeng Chen Chao Zheng Xinhui Zhou Junfeng Li Wei Huang

The rhodium-catalyzed synthesis of phenazasilines from readily achievable biarylhydrosilanes is presented. This highly efficient method offers opportunities for preparing π-extended phenazasilines with enhanced optoelectronic properties for device applications in organic electronics.

Journal: :Chemical communications 2013
Qian Chen Chao Chen Fang Guo Wujiong Xia

Chiral N-tert-butylsulfinyl vinyl aziridine ligands prepared from a readily available (R)-tert-butanesulfinamide have been applied in the rhodium-catalyzed asymmetric 1,4-addition of aryl boronic acids to cyclic enones, which gives high yields and excellent enantioselectivities.

Journal: :Chemical communications 2002
Martin Bröring Esther Cónsul Tejero Andreas Pfister Carsten D Brandt Jesús J Pérez Torrente

The metalation reactions of the 2,2'-bidipyrrin 4 with different rhodium(I) precursors yield the complexes 5 and 6 and the unusual corrinoid 7, depending only on the type of the ancillary ligand employed.

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