Metathesis carbenes

We note that there are NMR-based kinetic studies on zirconocene-catalyzed pro-pene polymerization [32], Rh-catalyzed asymmetric hydrogenation of olefins [33], titanocene-catalyzed hydroboration of alkenes and alkynes [34], Pd-catalyzed olefin polymerizations [35], ethylene and CO copolymerization [36] and phosphine dissociation from a Ru-carbene metathesis catalyst [37], just to mention a few. 

Developing analogues to carbene metathesis with nitrene chemistry is just now being explored, but few examples offer significant promise. Transfer of a nitrene to... 

Among the more novel non-carbene metathesis catalysts recently reported are the following. 

Ulman, M., Grubbs, R. H. Relative Reaction Rates of Olefin Substrates with Ruthenium(ll) Carbene Metathesis Initiators. Organometallics 1998, 17, 2484-2489. 

Torker S, Merki D, Chen P. Gas-phase thermochembtry of mthenium carbene metathesis catalysts. J Hm Chem Soc. 2008 130(14) 4808-4814. 

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