《Lactide polymerization using sterically encumbered, flexible zinc complex》 was written by Dordahan, Fatemeh; Schaper, Frank. Reference of Bis(pyridin-2-ylmethyl)amineThis research focused onzinc complex catalyst preparation lactide polymerization. The article conveys some information:
4-(Tert-Butyl)-2-trityl-6-(di-(2-picolyl)amine)phenol, LH, was prepared from paraformaldehyde, 4-(tert-butyl)-2-tritylphenol, and di-(2-picolyl)amine. Reaction with Zn(N(SiMe3)2)2 gave LZnN(SiMe3)2. The complex was shown by X-ray diffraction study, variable temperature NMR, and DFT calculations to coordinate only one pyridine ligand, which allows for fast and facile complex isomerisation. LZnN(SiMe3)2 was active in rac-lactide polymerization, but in contrast to previous complexes of this type, it did not show any evidence for isotactic monomer enchainment via a catalytic-site mediated chain-end control mechanism. Addition of alc. led to increased activity, but the complex was unstable in the presence of free alc. In the experiment, the researchers used many compounds, for example, Bis(pyridin-2-ylmethyl)amine(cas: 1539-42-0Reference of Bis(pyridin-2-ylmethyl)amine)
Bis(pyridin-2-ylmethyl)amine(cas: 1539-42-0) is a secondary amine with two picolyl substituents. The compound is a tridentate ligand in coordination chemistry and commonly used to produce Zn-based chemosensors/probes, such as Zinpry.Reference of Bis(pyridin-2-ylmethyl)amine