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For related attempts see (b) J. Org. Chem. 1982, 47, 4216. (c) Schneider, H.-J.; Freitag, W. J. Am. Chem. Soc. 1977, 99, 8363. (d) Schneider, H.-J.; Weigand, E. F. J. Org. Chem. 1977, 99, 8362. (e) Schneider, H.-J.; Schmidt, G. J. Chem. Soc., Perkin Trans. 2, in press. (f) Piccinni-Leopardi, C.; Reisse, J. J. Magn. Reson. 1981, 42, 60. (g) Balasubrahmanyam, S. N.; Bharathi, S. N.; Usha, G. Org. Magn. Reson. 1983, 21, 474
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2; E for CH-CH. A referee drew our attention to the recently published fitting procedure to the cyclopentane pseudorotational circle ((b) DeLeeuw, A. A. M.; Altona, C. J. Comput. Chem. 1983, 4, 428). which however is not expected to lead to a significant change in view of the already close fit. For a new approach see: (c) Colucci, W. J.; Jungk, S. J.; Gandour, R. D. Magn. Reson. Chem. 1985, 23, 335
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2; E for CH-CH. A referee drew our attention to the recently published fitting procedure to the cyclopentane pseudorotational circle ((b) DeLeeuw, A. A. M.; Altona, C. J. Comput. Chem. 1983, 4, 428). which however is not expected to lead to a significant change in view of the already close fit. For a new approach see: (c) Colucci, W. J.; Jungk, S. J.; Gandour, R. D. Magn. Reson. Chem. 1985, 23, 335.
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The Miscalculated differences between gauche-X-C-Cβ-C angles amount here to 7°
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