Synthesis and X-ray structures of new titanium(IV) aryloxides and their exploitation for the ring opening polymerization of epsilon-caprolactone
Davidson, M. G., Jones, M. D., Lunn, M. D. and Mahon, M. F., 2006. Synthesis and X-ray structures of new titanium(IV) aryloxides and their exploitation for the ring opening polymerization of epsilon-caprolactone. Inorganic Chemistry, 45 (5), pp. 2282-2287.
Related documents:This repository does not currently have the full-text of this item.
You may be able to access a copy if URLs are provided below.
A series of titanium catecholates have been prepared and characterized by single-crystal X-ray diffraction studies. Complexes 1a-7a were synthesized by the reaction of 1 equiv of ligand with Ti((OPr)-Pr-i)(4). All are dimers in the solid-state, in which a catechol bridges between two titanium centers. Electronic (nitro and methoxy groups) and steric (tert-butyl groups) effects of the ligand have been investigated. Complex 1b was synthesized by reaction of 2 equiv of ligand with Ti(OiPr)4. A dimer is again observed with the same bridging ligand together with a terminal catechol moiety. All complexes contain a coordinated 2-propanol ligand on each titanium center forming pseudo-octahedral metal centers. All complexes were tested for the ring-opening-polymerization of c-caprolactone to afford polycaprolactone (PCL). Reasonable yields (up to 79%) were obtained at room temperature, and narrow molecular weight distributions (1.13-1.27) were observed for the PCL produced. The most active complex was found to be complex 1a, containing unsubsituted catechol ligands.
|Creators||Davidson, M. G., Jones, M. D., Lunn, M. D. and Mahon, M. F.|
|Departments||Faculty of Science > Chemistry|
|Additional Information||ID number: ISI:000235787300054|
Actions (login required)