Synthesis of trans-Isotactic Poly(norbornene)s through Living Ring-Opening Metathesis Polymerization Initiated by Group VI Imido Alkylidene N-Heterocyclic Carbene Complexes
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DOI: 10.1021/acs.macromol.9b00422
Abstract: The selectivity of several molybdenum and tungsten imido alkylidene N-heterocyclic carbene (NHC) complexes in the ring opening metathesis polymerization (ROMP) of enantiomerically pure endo,exo-2,3-dicarbomethoxynorborn-5-ene (DCMNBE) was examined by 1H- and 13C NMR spectroscopy. With one… read more here.
Keywords: imido alkylidene; alkylidene heterocyclic; trans isotactic; heterocyclic carbene ... See more keywords
Reaction Mechanism of Ring-Closing Metathesis with a Cationic Molybdenum Imido Alkylidene N-Heterocyclic Carbene Catalyst
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DOI: 10.1021/acs.organomet.0c00311
Abstract: DFT calculations were carried out to explore all relevant pathways for the ring-closing metathesis (RCM) reaction of a cationic molybdenum imido alkylidene N-heterocyclic carbene (NHC) catalyst wit... read more here.
Keywords: imido alkylidene; cationic molybdenum; alkylidene heterocyclic; molybdenum imido ... See more keywords
Synthesis of Tungsten(VI) Imido Alkylidene Bispyrrolide Complexes via the Isocyanate Route
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DOI: 10.1021/acs.organomet.0c00435
Abstract: A general route to tungsten(VI) imido alkylidene bispyrrolide complexes via the extrusion of CO2 from the reaction of one equivalent of an aryl isocyanate with WOCl4 to form the corresponding imido... read more here.
Keywords: imido alkylidene; tungsten imido; alkylidene bispyrrolide; bispyrrolide complexes ... See more keywords
Tuning the Latent Behavior of Molybdenum Imido Alkylidene N-Heterocyclic Carbene Complexes in Dicyclopentadiene Polymerization
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DOI: 10.1021/acs.organomet.0c00740
Abstract: We report the synthesis of O- and N-chelated hexacoordinated molybdenum imido alkylidene N-heterocyclic carbene (NHC) bistriflate and pentacoordinated molybdenum imido alkylidene NHC monotriflate monoalkoxide complexes and their use as thermally latent and in some cases… read more here.
Keywords: molybdenum imido; alkylidene heterocyclic; polymerization; imido alkylidene ... See more keywords