Many laboratories have developed improved versions of the catalyst ever since, some of which are shown below.
The molybdenum based , which are based on ruthenium-benzylidene, are more user-friendly as they have great functional group tolerance and are easy to handle.
Studies on OM have further enhanced the understanding of this process, promoting the development of interesting and useful metathesis catalysts.
The generally accepted mechanism was originally proposed by Chauvin and Hérisson (Scheme 1) .
-The Grubbs catalyst is stable enough to be weighed in open air but once it is in a solution it is sensitive to the dissolved oxygen.