The scope of the book is to present the results of systematic investigations on the tautomerism of the prepared Azoisoxazolone dyes derived from the reaction of diazotized amine (aniline, 4-aminoantipyrine (4-aminophenazone), 2-aminothiazole and 3-amino-1,2,4-triazole) with 3-methyl-5-isoxazolone. The study of the experimental spectral and structural properties of these azo dyes as well as theoretical computational study of the tautomers of investigated compounds is further a goal of this research. This book contains the literature survey of previous works carried out on, the spectral and...