Titanium complexes phenoxy

Polyethylene-Wock-poly(clhylcnc-co-norbornene) (PE-fo-P(E-co-NBl ) block copolymer was successfully synthesized by a titanium complex with two non-symmetric bidentate /J-cnaminokclonalo ligands [136,137]. Bis(pyrrolide-imine)titanium complex also has the ability to produce the PE-fo-P(E-co-NBE) block copolymer. PE-fo-PS was synthesized via sequential monomer addition during homogeneous polymerization with bis(phenoxy-imine)metal catalysts [138]. 

Fujita and co-workers reported on the catalytic behavior of fluorinated bis (phenoxy-imine) titanium complexes bearing a series of substituents ortho to the phenoxy oxygen for ethylene/higher a-olefin (i.e., 1-hexene, 1-octene, and 1-decene) (co)polymerization (Fig. 3.6) [27]. 

R. Furuyama, M. Mitani, J.-L Mobii, R. Mori, H. Tanaka, T. Fujita, Ethylene/higher a olefin copolymerization behavior of fluminated bis(phenoxy- imine) titanium complexes with methylalumoxane synthesis of new polyethylene-based block copolymers. Macromolecules 38(5), 1546-1552 (2005)... 

Saito, J. Mitani, M. Mohri, J. Ishii, S. Yoshida, Y Matsugi, T. Matsui, S. et al. Highly syndiospecific living polymerization of propylene using a titanium complex having two phenoxy-imine chelate ligands. Chem. Lett. 2001, 576-577. 

Mitani, M. Furuyama, R. Mohri, J. Saito, J. Ishii, S. Terao, H. Nakano, T. Tanaka, H. Fujita, T. Syndiospecific living propylene polymerization catalyzed by titanium complexes having fluorine-containing phenoxy-imine chelate hgands. J. Am. Chem. Soc. 2003,125, 4293 305. 

Kojoh, S., Matsugi, T., Saito, J. etal. (2001) New monodisperse ethylene-propylene copolymers and a block copolymer created by a titanium complex having fluorine- containing phenoxy-imine chelate ligands. Chemistry Letters, 822-823. 

Saito, J., Mitani, M., Mohri, J. et al. (2001b) Living polymerization of ethylene with a titanium complex containing two phenoxy-imine chelate hgands. Angewandte Chemie-Intemationdl Edition, 40,2918-2920. 

Figure 4.14 Synthesis of a phenoxy functionalised NHC and its titanium(IV) carbene complex.

Bis(phenoxy-imine)titanium chloride complexes also exhibit a remarkable tolerance toward functional groups. ... 

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