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Isothiocyanates. IX. Infrared spectra of amino derivatives and isothiocyanate derivatives of acridine and benzacridine

P. Kristi√°n

Slovak Technical University, Bratislava


Abstract: cf. CA 58, 5635e. IR absorption spectra of amino and isothiocyanate derivs. of acridine (I) and benzacridine (II) in the area 3600-720 cm-1 are described. With the agreement in literature characteristic absorption waves were detd. in the area of basic and deformation vibrations of NH groups. All I and II except 5-aminoacridine (III) show absorption max. of medium intensity near 1335 cm-1, which corresponds to vibrations of CN groups of primary arom. amines and which proves a different structure of III from the other aminoacridines. All isothiocyanates were definitely identified with a wide absorption max. in the area 2130-2030 cm-1 The derivs., except 1- and 5-aminoacridine, showed near 1570 cm-1 an addnl. absorption max. which corresponds to the vibration of CC and CN in a hereto ring. It was detd. that the max. of amino derivs. is weak and medium intensity; it is very strong in isothiocyanates. 1-Aminoacridine caused a negligible shift of absorption max. to higher wavelengths, not only in the area of fundamental vibrations, but also in the area of deformation vibrations of the amino group.

Full paper in Portable Document Format: 1511-12a815.pdf (in Slovak)


Chemical Papers 15 (11-12) 815–829 (1961)

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