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 η
1
-pyrrolyl ligand bound to the M.
本文描述了用于催化开环寡聚合物
化学反应和环闭合反应的化合物和过程。该化合物是一种
钼或
钨金属(M)配合物,包括一个
亚胺配体(N—R)与M结合,形成M=N—R位点,一个M=C反应位点,其中M=C反应位点的碳原子通过含有1到12个碳原子的碳链或碳和杂原子(NOS)链与
亚胺配体的R相连,形成一个环状结构,并且有两到四个
配体(R′)与M结合,提供两到四个M-R′位点。在特定实施例中,M-R′位点包括与M结合的双烷氧基
配体的氧原子或η1-
吡咯基
配体的每个氮原子。