Vibrational spectra of fluorine-containing azoxybenzenes
The authors examined the influence of the introduction of fluorine atoms into aromatic fragments on the spectroscopic characteristics of bridging azoxy groups. For this purpose they obtained and analyzed the IR and Raman spectra of azoxybenzene (I) and some of its fluorinated derivatives: 4,4'-difluoro- and 3,3'-difluoroazaoxybenzene (II and III), 2,2',4,4',-tetrafluoro- and 2,2',5,5'-tetrafluoroazoxybenzene (IV and V), 2,2',3,3',4,4',5,5'-octafluoroazoxybenzene (VI), and compounds of the type 4-XC/sub 6/F/sub 4/N=N(O)C/sub 6/F/sub 4/X-4' (VII) (where X = F (a), H (b), CH/sub 3/ (c), OCH/sub 3/ (d), CF/sub 3/ (e), and Br (f)), as well as samples labeled with /sup 15/N at both nitrogen atoms (compounds I', IV', VIIa', VIIb', and VIId', respectively). The enrichment with /sup 15/N amounted to 94-96%. The vibrations of the azoxy group in azoxybenzene have been assigned on the basis of calculations of the frequencies and normal modes of vibrations for it. The introduction of fluorine atoms into the benzene rings has practically no influence on the frequencies of the stretching vibrations of the azoxy group. An increase in the number of fluorine atoms in the benzene rings of azoxybenzenes lowers the intensities of the stretching vibrations of the azoxy and phenyl groups in the IR spectra.
- Research Organization:
- Novosibirsk Institute of Organic Chemistry, USSR
- OSTI ID:
- 6477305
- Journal Information:
- Bull. Acad. Sci. USSR, Div. Chem. Sci. (Engl. Transl.); (United States), Journal Name: Bull. Acad. Sci. USSR, Div. Chem. Sci. (Engl. Transl.); (United States) Vol. 35:7; ISSN BACCA
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
400201* -- Chemical & Physicochemical Properties
640302 -- Atomic
Molecular & Chemical Physics-- Atomic & Molecular Properties & Theory
74 ATOMIC AND MOLECULAR PHYSICS
AROMATICS
AZO COMPOUNDS
BENZENE
CHEMICAL BONDS
CONFORMATIONAL CHANGES
ENERGY LEVELS
EXCITED STATES
FLUORINATED AROMATIC HYDROCARBONS
HALOGENATED AROMATIC HYDROCARBONS
HYDROCARBONS
INFRARED SPECTRA
ISOTOPES
LABELLED COMPOUNDS
LABELLING
LATTICE VIBRATIONS
LIGHT NUCLEI
NITROGEN 15
NITROGEN ISOTOPES
NUCLEI
ODD-EVEN NUCLEI
ORGANIC COMPOUNDS
ORGANIC FLUORINE COMPOUNDS
ORGANIC HALOGEN COMPOUNDS
ORGANIC NITROGEN COMPOUNDS
RAMAN SPECTRA
SPECTRA
SPECTRAL SHIFT
STABLE ISOTOPES
VIBRATIONAL STATES