2020
DOI: 10.1016/j.ccr.2020.213315
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Group 6 metal alkylidene and alkylidyne N-heterocyclic carbene complexes for olefin and alkyne metathesis

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Cited by 46 publications
(47 citation statements)
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“…This concept, that showed the importance of dissymmetry at the metal centre, was soon after generalized to d 0 Mo and W catalysts, [M(E)( CHR)(X)(Y)] with M(E) = Mo/W(imido/oxo) ( Scheme 1 ), 68,69 and shown to be a predictive guiding principle for the metathesis catalyst design not only in heterogeneous but also in homogeneous systems such as MAP, 25,70–78 MAC, 79,80 or NHC-stabilized cationic catalysts. 81–85 …”
Section: Bridging the Gap Between Molecular And Supported Catalystsmentioning
confidence: 99%
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“…This concept, that showed the importance of dissymmetry at the metal centre, was soon after generalized to d 0 Mo and W catalysts, [M(E)( CHR)(X)(Y)] with M(E) = Mo/W(imido/oxo) ( Scheme 1 ), 68,69 and shown to be a predictive guiding principle for the metathesis catalyst design not only in heterogeneous but also in homogeneous systems such as MAP, 25,70–78 MAC, 79,80 or NHC-stabilized cationic catalysts. 81–85 …”
Section: Bridging the Gap Between Molecular And Supported Catalystsmentioning
confidence: 99%
“…This concept, that showed the importance of dissymmetry at the metal centre, was soon aer generalized to d 0 Mo and W catalysts, [M(E)(] CHR)(X)(Y)] with M(E) ¼ Mo/W(imido/oxo) (Scheme 1), 68,69 and shown to be a predictive guiding principle for the metathesis catalyst design not only in heterogeneous but also in homogeneous systems such as MAP, 25,[70][71][72][73][74][75][76][77][78] MAC, 79,80 or NHC-stabilized cationic catalysts. [81][82][83][84][85] Metallacyclobutane intermediates of W-based catalysts are usually more stable than those of their Mo-based congeners and are oen observed; the Mo analogues are rarely reported for either homogeneous or well-dened silica-supported systems. 25,86 Computational results indicate that weaker s-donating ligands X and Y lead to more stable metallacyclobutane intermediates, and the isomerization between the two metallacyclobutane isomers (TBP and SP) via a turnstile process tends to be more facile for W as compared to Mo and for weaker s-donor ligands.…”
mentioning
confidence: 99%
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“…Research in academic and industrial laboratories over the last several decades has produced impressive advances in the field of alkene metathesis. 1 6 This research has helped establishing detailed structure–activity relationships (SAR) for well-defined Mo-, W- and Ru-based molecular catalysts, 7 , 8 and thereby aided in the rational development of catalytic systems with improved activity, selectivity and stability. 9 11 Within this, high-throughput experimentation (HTE) can accelerate building robust SAR as it allows for a rapid and systematic acquisition of data on large libraries of compounds and formulations enabling the identification of catalysts.…”
Section: Introductionmentioning
confidence: 99%
“…Alkene metathesis is a robust and atom‐economic synthetic method for the creation of carbon‐carbon double bonds; it has thus found ample use in both academia and industry [1–3] . Over the last decades, substantial efforts have been put in developing efficient molecular catalysts, [4–15] but immobilized analogs have received increasing attention because of their benefits for process intensification [16,17] and their improved performance with the development of well‐defined supported systems, mostly prepared through surface organometallic chemistry (SOMC) [18–23] . SOMC, a molecular approach to generate well‐defined heterogeneous catalysts, in which the surface is exploited as a ligand to covalently anchor molecular complexes, has been particularly successfully employed for the preparation of silica‐supported Schrock‐type metathesis catalysts of the general formula [(≡SiO)M(E)(=CHR)(X)] (M=Mo or W, E=NR or O), that display high activity, selectivity and stability with performances often surpassing those of their homogeneous counterparts ( Scheme 1).…”
Section: Introductionmentioning
confidence: 99%