Polymerization of ε-caprolactone using bulky alkoxo-titanium complexes and structural analysis of [Ti(OBorneoxo)2Cl2(thf)2]
摘要:
A variety of bisalkoxo titanium dichloride THF adducts [Ti(OR)(2)Cl-2(thf)(2)] {OR = adamantanoxo (9), (1R,2S,5R)-(-)-menthoxo (10), (1S-endo)-(-)-borneoxo (11)} have been prepared and characterized by spectroscopic techniques. The molecular structure of It has been determined by single-crystal X-ray diffraction studies. The parent Lewis acid bisalkoxo titanium dichloride derivatives and related alkoxo complexes [Ti(OR)(2)(OPri)(2)](2) have been tested as initiators in ring-opening polymerization of epsilon-caprolactone and L-lactide. (c) 2006 Elsevier B.V. All rights reserved.