Catalyst Complex With Carbene Ligand

Abstract

Catalytic complexes including a metal atom having anionic ligands, at least one nucleophilic carbine ligand, and an alkylidene, vinylidene, or allenylidene ligand. The complexes are highly stable to air, moisture and thermal degradation. The complexes are designed to efficiently carry out a variety of olefin metathesis reactions.

1 . A catalytic complex of the formula: 
       
         
           
           
               
               
           
         
       
       wherein either or both of C 1  and C 2  are optionally absent; 
       where
 M is Os or Ru; 
 R and R 1  are independently selected from the group consisting of hydrogen, C 1 -C 20  alkyl, C 2 -C 20  alkenyl, C 2 -C 20  alkynyl, C 2 -C 20  alkoxycarbonyl, aryl, C 1 -C 20  carboxylate, C 1 -C 20  alkoxy, C 2 -C 20  alkenyloxy, C 2 -C 20  alkynyloxy, aryloxy, C 1 -C 20  alkylthio, C 1 -C 20  alkylsulfonyl, and C 1 -C 20  alkylsulfinyl, each R and R 1  optionally being substituted with C 1 -C 5  alkyl, halogen, C 1 -C 10  alkoxy, or with a phenyl group substituted with halogen, C 1 -C 5  alkyl or C 1 -C 5  alkoxy, or with a functional group; 
 X and X 1  are independently selected from the group consisting of anionic ligands; and 
 L and L 1  are nucleophilic carbenes, each nucleophilic carbene comprising a carbene carbon further bonded to two heteroatoms independently selected from the group consisting of oxygen and sulfur.