Forlani, Luciano; Cristoni, Giampiero; Boga, Carla; Todesco, Paolo E.; Del Vecchio, Erminia; Selva, Simona; Monari, Magda published the artcile< Reinvestigation of the tautomerism of some substituted 2-hydroxypyridines>, Formula: C5H4ClNO, the main research area is UV NMR spectrometry tautomerism substituted hydroxypyridines LFER; crystallog nitropyridinone.
The tautomerism of some substituted 2-hydroxypyridines is investigated by UV/Vis- and 1H-, and 13C-NMR spectroscopic methods, with the aid of the N-Me and O-Me fixed parents. NMR spectroscopic data do not allow discrimination between the two tautomeric forms (with the exception of the unsubstituted 2-hydroxypyridine), while UV/Vis-data permit the quant. determination, in different solvents, of the amounts of the two forms. The electronic substituent effect and the change of solvent are discussed. An X-Ray diffraction study carried out on a crystal of 2-hydroxy-5-nitropyridine (7) reveals that this compound, in the solid state, is in the oxo-form.
ARKIVOC (Gainesville, FL, United States) [online computer file] published new progress about Crystal structure. 73018-09-4 belongs to class pyridine-derivatives, and the molecular formula is C5H4ClNO, Formula: C5H4ClNO.