Electron spin resonance studies of barriers to hindered rotation in

DOI: 10.1021/j100473a017. Publication Date: May 1979. ACS Legacy Archive. Cite this:J. Phys. Chem. 83, 10, 1323-1327. Note: In lieu of an abstract, th...
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The Journal of Physical Chemistty, Vol. 83, No. IO, 1979

ESR Study of Internal Rotation of Methyl Groups

presence of stronl: gauche bands in the vibrational spectrum. Acknowledgment. The authors gratefully acknowledge the financial support of this study by the National Aeronautics and Space Administration by Grant NGL-41002-003. References and Notes (1) (2) (3) (4) (5)

(6) (7) (8)

D. W. Scott and G. A. Crowder, J. Mol. Spectrosc., 26, 477 (1968). D. W. Scott, J. Cbem. Tbermodyn., 3, 843 (1971). P. J. Krueger and J. Jan, Can. J. Cbem., 48, 3229 (1970). S. C. Mehrotra, L. 1. Griffin, C. 0. Britt, and J. E. Boggs, J . Mol. Spectrosc., 64, 244 (1977). W. A. Lathan, L. Radom, W. J. Hehre, and J. A. Pople, J. Am. Cbem. SOC.,95, 699 (1973). J. R. Durig and A. W. Cox, J . Pbys. Chem., 80, 2493 (1976). P. Groner and J. R. Durig, J. Cbem. Phys., 66, 1856 (1977). J. R. Durig, P. Groner, and M. G. Griffin, J. Cbem. Pbys., 66, 3061 (1977).

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R. T. Hall and J. M. Dowling, J . Cbem. Pbys., 47, 2459 (1967); 52, 1161 (1970). IUPAC, "Tables of Wavenumbers for Calibration of Infrared Spectrophotometers", Butterworths, Washington, D.C., 1961. F. G. Baglin, S. F. Bush, and J. R. Durig, J. Cbem. Pbys., 47, 2104 (1967). F. A. Miller and P. M. Harney, Appl. Spectrosc., 24, 291 (1970). J. R. Durig, S. F. Bush, and F. G. Baglin, J . Cbem. Pbys.,49, 2106 (1968). V. F. Kalasinsky, G. A. Guirgis, and J. R. Durig, J . Mol. Struct., 39, 51 (1977). A. Y. Hlrakawa and M. Tsuboi, Proc. Int. Symp. Mol. Struct. Soectrosc.. 1962. A107 (19621. A: S. Manocha, E. C. Tuazon, and W. G. Fateley, J. Pbys. Chem., 78, 803 (1974). M. Tsuboi, K. Tamagake, A. Y. Hirakawa, J. Yamaguchi, H. Nakagawa, A. S.Manocha, E. C. Tuazon, and W. G. Fateley, J . Cbem. Pbys., 63, 5177 (1975). D. A. C. Compton, J . Cbem. SOC.,Perkin Trans. 2, 1307 (1977). S. Wolfe, Acc. Cbem. Res., 5, 102 (1972). J. R. Durig and Y. S. Li, J. Cbem. Pbys., 63, 4110 (1975).

Electron Spin Resonance Studies of Barriers to Hindered Rotation in Acetic Acid, Acetamide, and Peptide Radicals D. Suryanarayana and M. D. Sevilla" Department of Chemistry, Oakland University, Rochester, Michigan 48063 (Received December 20, 1978) Publication costs assisted by the U.S. Army Natick Research and Development Center and the U.S.Department of Energy

Activation energies for methyl group rotation in the radicals of type H3C-C