Abstract
The present manuscript is focused on the synthesis of a series of nickel complexes [Ni-HMBED, Ni-HMBPD and Ni-HMBBD] based on Salen-type Schiff-base ligands and a study of their reactivity for the ring-opening polymerization (ROP) of lactide. These nickel complexes were prepared by the reactions of a nickel solution with one molar equivalent of the Salen-type Schiff-base ligands in methanol under a nitrogen atmosphere. Characterization of these nickel complexes have been carried out by different analytical techniques, which showed a square planar geometry for the Ni atom. The nickel complexes have shown high activity towards the ring-opening polymerization of lactide, with variation in the diamine group. The linear relationship established between the percentage conversion and the number-average molecular weight has confirmed the controlled ROP by the use of the nickel complexes as a catalyst. Finally, a mechanism for the ROP of lactide has been proposed.
Sign-in/Register to access full text options 
Free) 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a call
