Jump to main content
Jump to site search

Issue 38, 2012
Previous Article Next Article

Synthesis, X-ray structures, and controlled ring opening polymerization behavior of L-lactide using titanium complexes chelated by tetradentate diamine–diethanolate ligand

Author affiliations

Abstract

The synthesis and characterization of LTi(O-i-Pr)2 (1) and LTiCl2 (2) complexes containing a new [ONNO]-type tetradentate diamine–diethanolate ligand such as (HOCMe2CH2NMeCH2CH2NMeCH2CMe2OH) (LH22) was achieved. Single-crystal X-ray analyses revealed that monomeric complexes 1 and 2 had pseudo-C2 and pseudo-C1 symmetric distorted octahedral geometry, respectively. Interestingly, complex 1 has facfac geometry for tetradentate L around a Ti centre in both solid and solution, whereas complex 2 has different geometry in solid (merfac, C1) and solution (facfac, C2). They are effective catalysts for the controlled ring opening polymerization of L-lactide, as shown by the linearity of the number average of the molecular weight of polylactides versus conversion, as well as narrow PDI values.

Graphical abstract: Synthesis, X-ray structures, and controlled ring opening polymerization behavior of l-lactide using titanium complexes chelated by tetradentate diamine–diethanolate ligand

Back to tab navigation
Please wait while Download options loads

Supplementary files

Publication details

The article was received on 17 Apr 2012, accepted on 26 Jul 2012 and first published on 30 Jul 2012


Article type: Paper
DOI: 10.1039/C2DT31357J
Citation: Dalton Trans., 2012,41, 11619-11626
  •   Request permissions

    Synthesis, X-ray structures, and controlled ring opening polymerization behavior of L-lactide using titanium complexes chelated by tetradentate diamine–diethanolate ligand

    S. H. Kim, D. J. Kim, M. Jeong Go, Y. Soo Ko, J. Lee and Y. Kim, Dalton Trans., 2012, 41, 11619
    DOI: 10.1039/C2DT31357J

Search articles by author