Photo-Isomerization and Decarboxilation of 2-Amino-5-Chlorobenzoic Acid in Argon Matrix

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In this paper, thematrix isolation infrared spectroscopy technique is presented, and itsapplication to the work of photoisomerization reaction for2-amino-5-chlorobenzoic acid (AClBA) was studied by matrix isolationspectroscopy in argon matrix at 15 K. The considered photoreactions includeconformational isomerizations as well as bond-breaking/bond-forming structuralisomerizations. UV irradiation at l> 234 nm of the matrix-isolated compound was found to lead to conversion ofthis conformer into the other conformers and also to decarboxylation of theAClBA, producted with of CO2 and 2-amino-5-chlorobenzene (AClB). Theanalysis of the experimental data on matrix isolated AClBA was supported byextensive quantum chemical calculations.

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