The author of 《Impact of Organometallic Intermediates on Copper-Catalyzed Atom Transfer Radical Polymerization》 were Fantin, Marco; Lorandi, Francesca; Ribelli, Thomas G.; Szczepaniak, Grzegorz; Enciso, Alan E.; Fliedel, Christophe; Thevenin, Lucas; Isse, Abdirisak A.; Poli, Rinaldo; Matyjaszewski, Krzysztof. And the article was published in Macromolecules (Washington, DC, United States) in 2019. HPLC of Formula: 7789-45-9 The author mentioned the following in the article:
In atom transfer radical polymerization (ATRP), radicals (R•) can react with CuI/L catalysts forming organometallic complexes, R-CuII/L (L = N-based ligand). R-CuII/L favors addnl. catalyzed radical termination (CRT) pathways, which should be understood and harnessed to tune the polymerization outcome. Therefore, the preparation of precise polymer architectures by ATRP depends on the stability and on the role of R-CuII/L intermediates. Herein, spectroscopic and electrochem. techniques were used to quantify the thermodn. and kinetic parameters of the interactions between radicals and Cu catalysts. The effects of radical structure, catalyst structure and solvent nature were investigated. The stability of R-CuII/L depends on the radical-stabilizing group in the following order: cyano > ester > Ph. Primary radicals form the most stable R-CuII/L species. Overall, the stability of R-CuII/L does not significantly depend on the electronic properties of the ligand, contrary to the ATRP activity. Under typical ATRP conditions, the R-CuII/L build-up and the CRT contribution may be suppressed by using more ATRP-active catalysts or solvents that promote a higher ATRP activity.Cupric bromide(cas: 7789-45-9HPLC of Formula: 7789-45-9) was used in this study.
Some reported applications of Cupric bromide(cas: 7789-45-9) are: catalyst in cross coupling reactions; co-catalyst in Sonogashira coupling; lewis acid in enantioselective addition of alkynes.HPLC of Formula: 7789-45-9
Referemce:
Copper catalysis in organic synthesis – NCBI,
Special Issue “Fundamentals and Applications of Copper-Based Catalysts”