The author of 《Synthesis of Hetero-multinuclear Metal Complexes by Site-Selective Redox Switching and Transmetalation on a Homo-multinuclear Complex》 were Ube, Hitoshi; Endo, Kenichi; Sato, Hiroyasu; Shionoya, Mitsuhiko. And the article was published in Journal of the American Chemical Society in 2019. Quality Control of 2-Bromo-5-methylpyridine The author mentioned the following in the article:
Hetero-multinuclear metal complexes are a promising class of compounds applicable to photoluminescence, magnetism, and catalysis. The authors have developed a synthetic method for hetero-tetranuclear cobalt and nickel cage complexes [M4L3X6]n+ with a bipyridyl functionalized zinc porphyrin (L) by combining advantages of site-selective redox switching and transmetalation. First, a homo-tetranuclear CoII4 complex was converted to a mixed-valence CoIIICoII3 complex by site-selective oxidation, which was then transmetalated from CoII to NiII to form a heterometallic CoIIINiII3 complex. Finally, a CoIINiII3 complex was synthesized by metal-selective reduction on the CoIII site. The basic structural frameworks of the main products in the whole process starting from the CoII4 complex are isostructural. Notably, the CoIINiII3 complex was not accessible by direct mixing of ligand, CoII, and NiII. This method would provide an alternative strategy for highly selective synthesis of hetero-multinuclear metal complexes. In the experimental materials used by the author, we found 2-Bromo-5-methylpyridine(cas: 3510-66-5Quality Control of 2-Bromo-5-methylpyridine)
2-Bromo-5-methylpyridine(cas: 3510-66-5) belongs to pyridine. When pyridine is adsorbed on oxide surfaces or in porous materials, the following species are commonly observed: (i) pyridine coordinated to Lewis acid sites, (ii) pyridine H-bonded to weakly acidic hydroxyls, and (iii) protonated pyridine. At high coverage, physisorbed pyridine and protonated dimers can also be observed.Quality Control of 2-Bromo-5-methylpyridine