Coumarin exhibits two infrared bands in the carbonyl stretching region of the spectrum. The doublet is due to Fermi resonance (F.R.) of the carbonyl stretching mode, vC=O, with an overtone of a lower-lying fundamental. The vC=O mode was corrected for F.R. in a series of solvents and solvent systems, and unperturbed vC=O was correlated with mole % solvent A/solvent B, and other parameters. The cause of shifts of vC=O in solvent systems is the result of several parameters, including bulk dielectric effects, basicity of the carbonyl group, and steric factors of both the solute and solvent.
JonesR. N.AngellC. L.ItoT. and SmithD. J. D, Can. J. Chem.37, 2007 (1959).
2.
LangsethA. and LordR. C, Kgl. Danske Vodenskab. Selskab. Mat.-fys. Medd.16, 6 (1938).
3.
NyquistR. A., The Interpretation of Vapor-Phase Infrared Spectra: Group Frequency Data (Sadtler Research Laboratories, Philadelphia, Pennsylvania, 1984), Vol. 1, p. 43.
4.
NyquistR. A.ChrzanV. and HouckJ, Appl. Spectrosc.43, 981 (1989).
5.
NyquistR. A.PutzigC. L. and YurgaL, Appl. Spectrosc.43, 983 (1989).
6.
NyquistR. A.PutzigC. L. and HashaD. L, Appl. Spectrosc.43, 1049 (1989).
7.
NyquistR. A.KirchnerT. M. and FoucheaH. A, Appl. Spectrosc.43, 1053 (1989).
8.
NyquistR. A., Appl. Spectrosc.43, 1208 (1989).
9.
NyquistR. A., Appl. Spectrosc.44 (1990), in press.
10.
NyquistR. A., Appl. Spectrosc.44 (1990), in press.
11.
NyquistR. A., Appl. Spectrosc.40, 336 (1986).
12.
NyquistR. A.ChrzanV.KirchnerT. M.YurgaL. and PutzigC, Appl. Spectrosc.44, 243 (1990).
13.
NyquistR. A., Appl. Spectrosc.43, 1374 (1989).
14.
NyquistR. A., Appl. Spectrosc.44 (1990), in press.
15.
NyquistR. A., Appl. Spectrosc.44 (1990), in press.
16.
NyquistR. A., Appl. Spectrosc.44 (1990), in press.
17.
WoharM. M.SeehraJ. K. and JagodinskiP. W, Spectrochim. Acta44A, 999 (1988).
18.
GutmannV., The Donor-Acceptor Approach to Molecular Interactions (Plenum Press, New York, 1978), p. 29.
19.
CRC Handbook of Chemistry and Physics, WeastR. C., Ed. (CRC Press, Boca Raton, Florida, 1983–1984), 64th ed.
20.
CRC Handbook of Solubility Parameters and Other Cohesion Parameters, BantonA. F. M., Ed. (CRC Press, Boca Raton, Florida1983).
21.
BuckinghamA. D., Can. J. Chem.308, 300 (1960).
22.
TimmermansJ., Physical-Chemical Constants of Binary Systems (Interscience Publishers, New York, 1959), Vol. 1, pp. 308, 309.
