Catalyst complexes with carbene ligand and method for making same and use in metathesis reaction

1 2 1 2 This invention relates to catalyst compounds and the synthesis and applications useful in olefin metathesis reactions. The catalyst compounds of the invention are represented by the formula (I): wherein M is a Group 8 metal; Xand Xare anionic ligands; Land Lare neutral two electron donor ligands. The present invention also relates to an easy applicable catalyst synthesis and the application in different olefin metathesis processes, e.g. Reaction Injection Molding (RIM), process to make α-olefins from fatty acid ester, e.g. methyl oleate.