Photolysis of <Emphasis Type="Italic">para</Emphasis>-azidobenzoic acid in solutions and in the crystalline state

Photolysis of para-azidobenzoic acid (p-ABA) in the crystalline state, organic solvents, and water at different pH values was studied by means of IR spectroscopy, electronic absorption spectroscopy, and TLC. The nature of L-ABA photolysis products is determined by the character of solvation or hydration of the acid in solutions and the relative arrangement of azide molecules in the crystalline state or highly concentrated solutions.