title: Magnesium amino-bis(phenolato) complexes for the ring-opening polymerization of rac-lactide.
abstract: Magnesium compounds of tetradentate amino-bis(phenolato) ligands, Mg[L1] (1) and Mg[L2] (2) (where [L1] = 2-pyridyl-N,N-bis(2-methylene-4-methoxy-6-tert-butylphenolato), and [L2] = dimethylaminoethylamino-N,N-bis(2-methylene-4-methyl-6-tert-butylphenolato)) were prepared. The proligands, H2[L1] and H2[L2] were reacted with di(n-butyl)magnesium in toluene to give the desired compounds in high yields. Compounds 1 and 2 exhibit dimeric structures in solutions of non-coordinating solvents as observed by NMR spectroscopy and in the solid state as shown by the single crystal X-ray structure of 2. These compounds exhibit good activity for rac-lactide polymerization in solution and in molten lactide.
authors: Department of Chemistry, Memorial University of Newfoundland, St. John's, Newfoundland, Canada A1B 3X7. ckozak@mun.ca.
authors: Katalin
authors: K
authors: Devaine-Pressing
authors: Joshua H
authors: JH
authors: Lehr
authors: Michelle E
authors: ME
authors: Pratt
authors: Louise N
authors: LN
authors: Dawe
authors: Amy A
authors: AA
authors: Sarjeant
authors: Christopher M
authors: CM
authors: Kozak
mesh_terms: D056831:Coordination Complexes / Q000737:chemistry*; D004146:Dioxanes / Q000737:chemistry*; D008024:Ligands; D008274:Magnesium / Q000737:chemistry*; D058105:Polymerization
chemical_list: D056831:Coordination Complexes; D004146:Dioxanes; D008024:Ligands; C091880:dilactide; D008274:Magnesium