Journal ArticleDOI
The life, death, and ROMP activity of ruthenium complexes containing the basic, chelating diphosphine bis(dicyclohexyl)-1,4-phosphinobutane
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TLDR
In this paper, the reaction of RuCl2(PPh3)3 with bis(dicyclohexyl)-1,4-phosphinobutane (dcypb) under N2 affords access to a formerly elusive family of dcypb complexes based on the RuCl 2(PP) core.Abstract:
Reaction of RuCl2(PPh3)3 with bis(dicyclohexyl)-1,4-phosphinobutane (dcypb) under N2 affords access to a formerly elusive family of dcypb complexes based on the RuCl2(PP) core. Under Ar or vacuum a...read more
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New vistas in N-heterocyclic silylene (NHSi) transition-metal coordination chemistry: syntheses, structures and reactivity towards activation of small molecules.
TL;DR: The striking influence of coordinating NHSi's to transition-metal complex fragments affording different reactivities to the "free" NHSi is a connecting theme ("leitmotif") throughout the review, and highlights the potential of these compounds which lie at the interface of contemporary main-group and classical organometallic chemistry towards new molecular catalysts for small-molecule activation.
Journal ArticleDOI
DFT Prediction and Experimental Observation of Substrate-Induced Catalyst Decomposition in Ruthenium-Catalyzed Olefin Metathesis
Werner Janse van Rensburg,Petrus J. Steynberg,Wolfgang H. Meyer,Megan M. Kirk,Grant S. Forman +4 more
TL;DR: Ruthenacyclobutane decomposition is predicted by density functional theory calculations and experimentally confirmed by propene and butene formation during degenerate Ru-methylidene-catalyzed metathesis of ethylene.
Journal ArticleDOI
Dehydrogenation of Saturated CC and BN Bonds at Cationic N-Heterocyclic Carbene Stabilized M(III) Centers (M = Rh, Ir)
TL;DR: Chloride abstraction from the group 9 metal bis(N-heterocyclic carbene) complexes M(NHC)(2)(H)(2)Cl leads to the formation of highly reactive cationic species capable of the dehydrogenation of saturated CC and BN linkages.
Journal ArticleDOI
A Stable Ruthenium Catalyst for Productive Olefin Metathesis
Grant Stephen Forman,Ann E. Mcconnell,Martin J. Hanton,Alexandra M. Z. Slawin,Robert P. Tooze,Werner Janse van Rensburg,Wolfgang H. Meyer,Catherine L. Dwyer,Megan M. Kirk,D. Wynand Serfontein +9 more
TL;DR: In this paper, a ruthenium carbene complex 5 and 6, containing a rigid bicyclic phosphine moiety, has been prepared, and the structure of 5 has been unambiguously established by single-crystal X-ray diffraction studies.
Journal ArticleDOI
Sterically Encumbered Iridium Bis(N-heterocyclic carbene) Systems: Multiple C−H Activation Processes and Isomeric Normal/Abnormal Carbene Complexes
Christina Y. Tang,William C. Smith,Dragoslav Vidovic,Amber L. Thompson,Adrian B. Chaplin,Simon Aldridge +5 more
TL;DR: In this paper, the planar four-coordinate Ir(I) complex Ir(IPr)(IPr′′)Cl (1) formed by dehydrogenation of one of the IPr isopropyl substituents was shown to be facile for the methyl C−H bonds of the carbene substituent.
References
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Journal ArticleDOI
Well-defined ruthenium olefin metathesis catalysts: Mechanism and activity
TL;DR: Several ruthenium-based olefin metathesis catalysts of the formula (PR3)2X2RuCHCHCPh2 have been synthesized, and relative catalyst activities were determined by monitoring the ring-closing met athesis of the acyclic diene diethyl diallylmalonate as discussed by the authors.
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Catalytic asymmetric reductive amination of ketones via highly enantioselective hydrogenation of the CN double bond
TL;DR: In this article, an asymmetric reductive reductive amination procedure for the conversion of ketones to chiral hydrazines and amines was described. But the reduction products, N-acylhydrazines, were converted to hydrazine or amine through hydrolysis or treatment with samarium(II) iodide, respectively.
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Chemistry of bis(dihydrogen) ruthenium complexes and of their derivatives
TL;DR: A review of bis(dihydrogen) complexes can be found in this paper, where the synthesis and characterization of RuH2(H2)2(PCy3)2.
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Highly Selective Dehydrogenative Silylation of Ethylene Using the Bis(dihydrogen) Complex RuH2(H2)2(PCy3)2 as Catalyst Precursor
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Synthesis, characterization and reactivity of some mono- and dinuclear chlororuthenium complexes containing chelating ditertiary phosphines (PP) with PP:Ru=1
TL;DR: In this paper, mixed-valence complexes of the type (PP)ClRu(μ-Cl)3RuCl(PP), and the products formed by their reduction with H2, are synthesized, where PP is a chelating ditertiary phosphine Ph2P(CH2)nPPh2 (n=3-6) or some related chiral analogues such as diop, chiraphos, dppcp, dpcycp, bdpp
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Tina M. Trnka,Robert H. Grubbs +1 more