Giacobbe, Thomas J.; McGregor, Stanley D.; Beman, Floyd L. published the artcile< Ultraviolet spectra of the chloropyridines and chlorinated pyridines possessing a sulfur (0SR), nitrogen (-NR2), or oxygen (-OR) substituent in either the 2 or 4 position. Convenient method for distinguishing such positional isomers>, Reference of 14121-36-9, the main research area is chloropyridine UV isomerism; pyridine chloro UV.
A correlation is established between the position (2 versus 4) of the S, N, or O substituent on the chlorinated pyridines and their uv spectra. The chlorinated pyridines with S, N, or O substitution at the 2-position give uv spectra whose longest wavelength absorption maxima are enhanced (moved to a greater wavelength and an increased extinction coefficient) when compared to the spectra of the 4-substituted isomers. The number of Cl atoms, and not their position, is the more significant factor in determining the overall character of the spectra.
Journal of Heterocyclic Chemistry published new progress about Isomers. 14121-36-9 belongs to class pyridine-derivatives, and the molecular formula is C5HCl4N, Reference of 14121-36-9.