Abstract

When the solute/solvent interaction was studied in a series of organic compounds containing the nitro group, infrared (IR) spectra showed that the nitro antisymmetric stretching mode [<i>v</i>_as(NO₂)] of 1,4-dinitrobenzene has the highest frequency among all studied nitrobenzenes, whereas the symmetric stretching mode [<i>v</i>_s(NO₂)] is one of the lowest. The <i>v</i>_as(NO₂) frequency was assumed to be regular, and no attention was paid to its particularly high value. The <i>v</i>_s(NO₂) band frequency of 1,4-dinitrobenzene appears at a lower frequency than the "expected" value. An attempt has been made to explain this deviation in terms of the Ph-N bond participation in the vibration <i>v</i>_s(NO₂) of 1,4-dinitrobenzene.

The Spectrum of Nitrogen Dioxide in the 1.4–3.4μ Region and the Vibrational and Rotational Constants of the NO₂ Molecule*

Gordon E. Moore
J. Opt. Soc. Am. 43(11) 1045-1050 (1953)

Vibrational Spectra and Calculated Thermodynamic Properties of 1,1,1,2-Tetrachloroethane and Pentachloroethane*

J. Rud Nielsen, C. Y. Liang, and Lester W. Daasch
J. Opt. Soc. Am. 43(11) 1071-1078 (1953)

Persistent infrared spectral hole burning of NO₂⁻ and NO₃⁻ ions in potassium iodide: II. Spectral changes far from the burn frequency

W. P. Ambrose and A. J. Sievers
J. Opt. Soc. Am. B 9(5) 753-762 (1992)

Rotation-Vibration Spectra of Diatomic and Simple Polyatomic Molecules with Long Absorbing PathsXI. The Spectrum of Carbon Dioxide (Co₂) below 1.25μ*

G. Herzberg and L. Herzberg
J. Opt. Soc. Am. 43(11) 1037-1044 (1953)

Stratospheric NO₂ retrieval from solar absorption spectra in the ν₃ and ν₁ + ν₃ infrared bands

M. T. Coffey, William G. Mankin, and A. Goldman
Appl. Opt. 25(15) 2460-2462 (1986)