Ketiminato complexes

Amido ketiminato complexes, with bis-Cp Ti, 4, 579 Amido nitrogen-donor complexes, with Zr(IV) and Hf(IV),... 

Many other /3-ketiminato complexes have been prepared, as listed in Table 6. 

Similarly, nitrilo ligands are attacked by enolato anions. So, reaction of [Ru(acac)2 (NCR)2l with various ketones R C(0)CH2R" gives rise to /3-ketiminato complexes 67 . However, it is not clear which reagents are responsible for the deprotonation and oxidation that takes place in this process. The reaction between [Zn(Tp )(CH2CN)] and acetone to give 68 could occur through the enolato complex 69 . ... 

Nucleophilic attack of an enolato or a 2-oxoalkyl ligand to the carbon atom of a cyano group can also give ketiminato complexes. In fact, 70 reacts with AgTfO and RCN to... 

The bis-Gp amido ketiminato complex Gp2Ti(NHGHPh2)(N=CPh2) can be prepared by the reaction of Gp2Ti(Me3SiC2SiMe3) with 2equiv. of HN=CPh2 in -hexane at room temperature.1512... 

Finally, MacAdams et investigated chromium complexes bearing 2,4-pentane-iV,iV -bis(aryl)ketiminato ((Ar) 2nacnac) ligands for ethylene polymerization. At room temperature in the presence of ethylene, 88 (Figure 24) formed linear PE with narrow molecular weight distributions My,/Mn= 1.17-1 A], The Afn was shown to increase linearly with polymer yield. These results represented the first report of living ethylene polymerization with a chromium-based catalyst. 

---