Abstract
The chemical shift contribution of the polar and the magnetic anisotropy effects due to the side chain carbonyl group is calculated for the methylene and the α-methyl protons of isotactic poly(methyl methacrylate) using 51 and 52 helical chain models. The contribution from the dyad monomeric units to the methylene protons gives larger magnetic shielding to the threo proton than the erythro proton, and that from the triad monomeric units to the α-methyl protons shifts the position of α-methyl protons slightly at higher field than the threo proton. This order of the chemical shifts calculated agrees with the observed order. The chemical shifts calculated on the two types of 51 models explain the observed values better than the 52 model.
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F. A. Bovey and G. V. D. Tiers, J. Polym. Sci., 44, 173 (1960).
A. Nishioka, H. Watanabe, I. Yamaguchi, and H. Shimizu, J. Polym. Sci., 45, 232 (1960).
U. Johnsen and K. Tessmer, Kolloid Z., 168, 160 (1960).
F. A. Bovey, "Macromolecular Chemistry," Vol. 3 (IUPAC), Butterworths, London, 1967, p. 349.
C. Schuerch, W. Fowells, A. Yamada, F. A. Bovey, F. P. Hood III, and E. W. Anderson, J. Am. Chem. Soc., 86, 4481 (1964).
T. Yoshino, J. Komiyama, and M. Shinomiya, J. Am. Chem. Soc., 86, 4482 (1964).
W. M. Ritchey and F. J. Knoll, J. Polym. Sci., B4, 853 (1966).
S. Mizushima and T. Shimanouchi, J. Am. Chem. Soc., 86, 3521 (1964).
F. A. Bovey, F. P. Hood III, E. W. Anderson, and L. C. Snyder, J. Chem. Phys., 42, 3900 (1965).
J. D. Stroupe and R. E. Hughes, J. Am. Chem. Soc., 80, 2341 (1958).
M. D'Alagni, P. De Santis, A. M. Liquori, and M. Saino, J. Polym. Sci., Part B, 2, 925 (1964).
A. M. Liquori, G. Anzuino, M. D'Alagni, V. Vitaglinno, and L. Constantino, J. Polym. Sci., Part A-2, 6, 509 (1968).
H. Tadokoro, Y. Chatani, H. Kusanagi, and M. Yokoyama, Rep. Prog. Polym. Phys. Jpn., 12, 173 (1969).
A. D. Buckingham, Can. J. Chem., 38, 300 (1960).
A.L. MaClellan, Table of Experimental Dipole Moments, Freeman Co., San Francisco, 1963.
L. Pauling, Nature of Chemical Bond, Cornell University Press, 1960.
E. Weber, Electromagnetic Fields, Vol. 1, John Wiley & Sons, New York, 1950, Chapter 2.
H. M. McConell, J. Chem. Phys., 27, 226 (1957).
J. A. Pople, J. Chem. Phys., 37, 60 (1962).
T. Miyazawa, J. Polym. Sci., 55, 215 (1961).
A. Nishioka and M. Nagai, 17th Polymer Symposium, Matsuyama, 24F05, Oct., 1968.
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Ando, I., Nishioka, A. The Chemical Shift of Isotactic Poly(methyl methacrylate). Polym J 1, 288–295 (1970). https://doi.org/10.1295/polymj.1.288
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DOI: https://doi.org/10.1295/polymj.1.288