The reaction of an aromatic heterocycle with a proton is called a protonation. One of articles about this theory is 《The tautomerism of N-heteroaromatic hydroxy compounds. II. Ultraviolet spectra》. Authors are Mason, S. F..The article about the compound:Isoquinolin-6-olcas:7651-82-3,SMILESS:OC1=CC2=C(C=NC=C2)C=C1).COA of Formula: C9H7NO. Through the article, more information about this compound (cas:7651-82-3) is conveyed.
The UV spectra of 68 N-heteroaromatic hydroxy compounds and their O- and N-Me derivatives with fixed structures have been measured. These were measured with a Hilger Uvispek H700/305 quartz spectrophotometer in buffered aqueous solutions The buffer solutions were 0.01M acetate for pH 3.8-5.7; 0.01M phosphate for pH 6.0-7.9, and 10.3-11.3; and 0.01M borate for pH 8.2-10.0. The variations of the spectra with temperature were measured by means of a water-jacketed cell-holder maintained at a constant temperature (±0.05°) with H2O circulated from a thermostat. By comparing spectra, it was found that tautomerism from O-H to N-H forms in general among the monoaza and some diaza heterocyclic hydroxy compounds Equilibrium constants (Kt = [N-H form]/[O-H form] have been estimated from the spectra, and they have been found to increase with conjugation between the O and N atom, and with the addition of fused benzene rings, and to decrease with aza substitution, with a rise in temperature, and with a fall in the dielec. constant of the solvent.
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Chapter 1 An introduction to palladium catalysis,
Palladium/carbon catalyst regeneration and mechanical application method