In an article, author is Sun, Kewei, once mentioned the application of 1049026-49-4, Name is 2-Bromo-5-(methylthio)pyrazine, molecular formula is C5H5BrN2S, molecular weight is 205.08, MDL number is MFCD09753145, category is Pyrazines. Now introduce a scientific discovery about this category, Recommanded Product: 1049026-49-4.
Heterocyclic Ring-Opening of Nanographene on Au(111)
Cyclo-dehydrogenation is of importance to induce the planarization of molecules on noble surfaces upon annealing. In contrast to a number of successful syntheses of polycyclic aromatic hydrocarbons by forming carbon-carbon bonds, it is still rare to conduct conjugation and cleavage of carbon-nitrogen bonds in molecules. Here, we present a systematic transformation of the C-N bonds in11,11,12,12-tetraphenyl-1,4,5,8-tetraazaanthraquinodimethane as well as three other derivatives on Au(111). With bond-resolved scanning tunneling microscopy, we discovered novel the heterocyclic segregation reaction of one pyrazine ring with two nitrogen atoms to form two quinoline rings with one nitrogen each. Density functional theory calculations showed that the intramolecular ring-forming and -opening of N-heterocycles are strongly affected by the initial hydrogen-substrate interaction.
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