Generation and characterization of 2,6-azulylene was written by Koenig, Thomas;Rudolf, K.;Chadwick, R.;Geiselmann, H.;Patapoff, T.;Klopfenstein, C. E.. And the article was included in Journal of the American Chemical Society in 1986.Safety of 1-Butyl-4-methylpyridin-1-ium bromide This article mentions the following:
A 2:3 syn-anti mixture of [2.2]2,6-azulenophane was prepared and 2,6-azulylene (I) generated by flash vacuum pyrolysis. This nonalternant polyene (I) is reactive, polymerizing via a 2nd-order rate law. However, I can be isolated and characterized at low temperature Proton NMR, Raman and UV spectra all support the structure of I. The syn/anti isomer ratio of the cyclophanes reformed from I is the same as that in the Hofmann-elimination synthesis, suggesting that I is an intermediate in that reaction. Calculations of lowest excited states by the CNDO/S and HAM3/CI models are also reported. Fluorescence and excitation spectra indicate anti-Kasha fluorescence at least in part. In the experiment, the researchers used many compounds, for example, 1-Butyl-4-methylpyridin-1-ium bromide (cas: 65350-59-6Safety of 1-Butyl-4-methylpyridin-1-ium bromide).
1-Butyl-4-methylpyridin-1-ium bromide (cas: 65350-59-6) belongs to pyridine derivatives. Pyridine has a conjugated system of six 闂?electrons that are delocalized over the ring. The molecule is planar and, thus, follows the H闂佹椿浜滈妴鍗l criteria for aromatic systems. One of the examples of pyridines is the well-known alkaloid lithoprimidine, which is an A3 adenosine receptor antagonist and N,N-dimethylaminopyridine (DMAP) analog, commonly used in organic synthesis.Safety of 1-Butyl-4-methylpyridin-1-ium bromide