Cyclometallated palladium imine

Cyclometallated iridium complexes, for OLEDs, 12, 145 Cyclometallated palladium(II) complexes from amines and pyridines, 8, 280 with C,C-chelating ligands, 8, 291 enantioselective synthesis, 8, 296 ferrocene-based palladacycles, 8, 292 four-membered palladacycles, 8, 297 imine- and oxime-based complexes, 8, 285 with N-N and N=N bonds, 8, 288 palladacycle catalysis, 8, 297... 

Table 8.3 Molecular weight, molecular weight distribution, and melting temperature of polyethylene obtained by using the imine cyclometalated palladium catalysts 8.94b and 8.94c [139]...

Cyclometalation is one of the most reliable and versatile methods for the synthesis of stable Pd-C a-bonds. In this reaction, a palladium (or other metal) complex is reacted with a ligand possessing a donor atom. The metal is directed by the donor atom to insert into a C-H bond, forming a chelate ring. This donor is usually the nitrogen of a tertiary amine, heterocyclic amine, or imine, or a phosphorus in a tertiary phosphine or phosphite. Other donor atoms, such as O and S, are occasionally encountered. The chelate ring size is normally five. ... 

In 1997, Gomez, Granell, and Martinez [6] also reported on similarly easy five-membered ring formation. The cyclometalation reactions of imines with palladium acetate have been studied in toluene solutions, as shown in Fig. 6.2. 

Fig. 6.2 Formation of ring compounds in cyclometalation reactions of imines with palladium acetate [6]...

---