Crystal, Molecular, Electronic Structures and Spectroscopic Characteristics of N-Hydroxyamide of 3-[3,3-Dimethyl-1,2,3,4-Tetrahydroisoquinolin-1-Iden]-2-Oxopropanoic Acid

Abstract

X-ray crystallography, quantum chemical modeling, IR, and electron spectroscopy methods are used to establish the structure of N-hydroxyamide of 3-[3,3-dimethyl-1,2,3,4-tetrahydroisoquinolin-1-iden]-2-oxopropanoic acid (1) possessing antifungal activity. It is shown that compound 1 exists in the form of an enamino-ketone-hydroxamic isomer in both crystalline state and solutions. The total charges on the atoms of the tetrahydroisoquinoline fragment and the atoms of the substituent in position 1 in molecule 1 are +0.425 e and −0.425 e, respectively. The structural and spectroscopic characteristics can be used in the studies of similar compounds.