Patent ID: 8436110

Claim:
A metathesis catalyst system comprising a bimetallic ruthenium-ligand complex represented by the following formula: wherein each q is 1; each Q is independently selected from 6-electron donor arene ligands; wherein each n is the same and is 0, 1, or 2; wherein each Y is an anionic di(t-butyl)phosphido ligand, with the proviso that when n=0, then the catalyst system further comprises di(tertiary-butyl)phosphine and a carbene-generating agent that is represented by the following formula: wherein each R is independently selected from hydrogen and monovalent C1-C20 hydrocarbyl groups and substituted variants thereof; or alternatively, wherein both R groups are bonded together to form a divalent C 3 -C 8 alkylene or divalent C 4 -C 7 arylene group, or substituted variant thereof; and wherein X is either hydroxyl or halogen.