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Imido-tethered carbenes of molybdenum for ring-opening metathesis polymerization and ring-closing metathesis
Imido-tethered carbenes of molybdenum for ring-opening metathesis polymerization and ring-closing metathesis
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机译：钼亚胺系羧甲基用于开环易位聚合和闭环易位
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摘要
Compounds and processes for catalytic ring-opening cyclooligomerization metathesis and ring-closing metathesis of olefins are described. The compound is a molybdenum or tungsten metal (M) complex which comprises an imido ligand (N—R) bound to the M to provide an M=N—R site, an M=C reaction site wherein the C of the M=C reaction site is tethered to the R of the imido ligand via a carbon or carbon and heteroatom (NOS) chain containing 1 to 12 carbon atoms to form a ring structure, and two to four ligands (R′) bound to the M to provide two to four M-R′ sites. In particular embodiments, the M-R′ sites include each of the oxygens of a dialkoxide ligand or each of the nitrogens of an η1-pyrrolyl ligand bound to the M.
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