摘要
The reaction of anhydrous CoCl2 with NaOAr （ArO=2,4,6-tri-tert-butylphenoxo） in THF at room temperature in 1 ： 3 molar ratio afforded anionic cobalt aryloxide [Na（THF）6][Co（OAr）3] （1）. The definite structure of this com- plex was characterized by X-ray single crystal diffraction. It was found that this anionic aryloxo cobalt（Ⅱ） complex could effectively initiate the ring-opening polymerization of L-lactide both in solution and in bulk, leading to high molecular weight poly（L-lactide）.
The reaction of anhydrous CoCl2 with NaOAr （ArO=2,4,6-tri-tert-butylphenoxo） in THF at room temperature in 1 ： 3 molar ratio afforded anionic cobalt aryloxide [Na（THF）6][Co（OAr）3] （1）. The definite structure of this com- plex was characterized by X-ray single crystal diffraction. It was found that this anionic aryloxo cobalt（Ⅱ） complex could effectively initiate the ring-opening polymerization of L-lactide both in solution and in bulk, leading to high molecular weight poly（L-lactide）.
基金
Acknowledgement This work was partially supported by the NatxonaL Natural Science Foundation of China （Nos. 21042007, 21172162）, the Nature Science Basic Research of Jiangsu Province for Higher Education （No. 10KJB 150016）, the Priority Academic Program Development of Jiangsu Higher Education Institutions and Key Project in Science and Technology Innovation Cultivation Program of Soochow University.
