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Microwave Spectra and Structure of Dimethyl Ether
1.P. H. Kasai and R. J. Myers, J. Chem. Phys. 30, 1096 (1959).
2.For further experimental details see the Ph.D. theses of P. H. Kasai (1958) and U. Blukis (1960), University of California, Berkeley.
3.The Matheson Company, Inc., East Rutherford, New Jersey.
4. was supplied by Merck & Company of Canada; isotopic purity 99%. 17.9% was prepared by reducing generated from supplied by Eastman Kodak Company, Rochester, New York. was reduced with as described by A. Murray, III, and D. L. Williams, Organic Synthesis with Isotopes (Interscience Publishers, Inc., New York, 1958), p. 899,
4.and J. D. Cox, H. S. Turner, and R. J. Warne, J. Chem. Soc. 1950, 3167.
5.Weizman Institute of Science, Rehovoth, Israel; isotopic purity 82%.
6.Metal Hydrides, Inc., Beverly, Massachusetts.
7.Eastman Kodak Company, Rochester, New York.
8.G. L. Cunningham, A. W. Boyd, R. J. Myers, W. D. Gwinn, and W. I. LeVan, J. Chem. Phys. 19, 676 (1951);
8.G. L. Cunningham, Ph.D. thesis, University of California, Berkeley, 1950.
9.S. A. Marshall and J. Weber, Phys. Rev. 105, 1502 (1957).
10.A. A. Maryott and F. Buckley, Natl. Bur. Std. (U.S.) Circ. 537, (1953).
11.C. C. Costain, J. Chem. Phys. 29, 864 (1958).
12.L. Pierce, J. Mol. Spectry. 3, 575 (1959).
13.J. Kraitchman, Am. J. Phys. 21, 17 (1953).
14.Coordinates of the various atoms are defined in Fig. 1. The isotopic species symbols used in this section and further on are identified in Table III.
15.For the equilibrium structure from symmetry. is eliminated because it has the largest experimental error (see footnote b, Table III).
16.If coupling between the methyl groups is neglected the tunneling rate is given approximately by the frequency difference between the single top A and E levels in the ground torsional state (calculated from the barrier height given in reference 1). For a discussion of this point see C. H. Townes and A. L. Schanlow, Microwave Spectroscopy (McGraw‐Hill Book Company, Inc., New York), Chap. 12.
17.E. g., D. R. Lide, Jr., J. Chem. Phys. 33, 1514 (1960).
18.V. W. Laurie, J. Chem. Phys. 28, 804 (1958).
19.The method of calculation is in principle the same as that used by Darling and Dennison on B. T. Darling and D. M. Dennison, Phys. Rev. 57, 128 (1940).
20.K. Kimura and M. Kubo, J. Chem. Phys. 30, 151 (1959).
21.L. Pierce and M. Hayashi, J. Chem. Phys. 35, 479 (1961).
22.See, for example, C. A. Coulson, Valence (Oxford University Press, New York, 1952), p. 194.
23.M. Jen and D. R. Lide, Jr., J. Chem. Phys. 36, 2525 (1962).
24.L. S. Bartell and R. A. Bonham, J. Chem. Phys. 31, 400 (1959).
25.I. Fischer, Ark. Fysik 1, 495 (1949).
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