The Congeners of Metal Carbynes with M E Triple Bonds

11 The Congeners of Metal Carbynes with M=E Triple Bonds 

12 The First and Second Generation of Grubbs Ruthenium Carbenes 

With the experimental tools of Grubbs group, SonBinh Nguyen discovered in a short period of time that 81 did not only catalyze the metathesis of acyclic olefins but was also competitive with Schrock s molybdenum carbenes in ringclosing metathesis (RCM) [171]. Compared with Schrock s compounds, the ruthenium carbenes had the advantage that they were only moderately sensitive 

4 It is interesting to note, that apart from the impressive series of transition metal complexes with monodentate NHCs, tetracarbene palladium(II) and platinum(II) as well as hexacarbene iron(III) complexes with bi- and tridentate chelating carbene ligands were prepared. 

13 From Metal Carbenes to Open-Shell Metal Carbyne and Carbido Complexes 

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