Chemistry is the experimental science by definition. We want to make observations to prove hypothesis. For this purpose, we perform experiments in the lab. , Recommanded Product: 73-22-3, 73-22-3, Name is H-Trp-OH, molecular formula is C11H12N2O2, belongs to catalyst-ligand compound. In a document, author is Li, Shuaikang, introduce the new discover.
8-Arylnaphthyl substituent retarding chain transfer in insertion polymerization with unsymmetrical alpha-diimine systems
Late transition metal olefin polymerization catalysts based on the imine structure are usually constructed with bulky arylamines as the basic unit. In this contribution, a flexible compact alkyl amine and a series of rigid bulky anilines were introduced into the alpha-diimine catalytic system at the same time. Thus, a series of unsymmetrical alpha-diimine ligands bearing an n-butyl moiety and diarylmethyl or 8-arylnaphthyl moiety as well as the corresponding nickel and palladium complexes were designed, synthesized and characterized. These unsymmetrical alpha-diimine nickel and palladium complexes were investigated for ethylene polymerization and copolymerization with methyl acrylate (MA). Under the synergistic effect of compact alkyl substituents and bulky aryl substituents, the nickel complexes showed moderate to high activities and generated low to high molecular weight polyethylene with various branching densities. Similar polymerization results were also observed in the corresponding palladium system. The aryl orientation in rigid bulky aryl substituents has significant effects on the polymerizations and copolymerizations in terms of activity, the molecular weight of the obtained polyethylene and copolymer, and the incorporation ratio of MA.
A reaction mechanism is the microscopic path by which reactants are transformed into products. Each step is an elementary reaction. In my other articles, you can also check out more blogs about 73-22-3. Recommanded Product: 73-22-3.
Reference:
Metal catalyst and ligand design,
,Ligand Template Strategies for Catalyst Encapsulation – NCBI