Abstract
Bellamy and Williams1 found that for primary amines in which both N–H bonds are equivalent and mass and coupling effects negligible, the symmetric (vs) and asymmetric (vas) NH2 stretching frequencies were related by equation (1) with a standard deviation of 4.8 cm.−1 and in the more restricted case of meta and para substituted anilines, Krueger and Thompson2 found that equation (2) was obeyed with an average error of less than 1 cm.−1. For primary amides, Puranik and Ramiah3 deduced the following equation:
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References
Bellamy, L. J., and Williams, R. L., Spectrochim. Acta, 9, 341 (1957).
Krueger, P. J., and Thompson, H. W., Proc. Roy. Soc., A, 250, 22 (1959).
Puranik, P. G., and Ramiah, K. V., Nature, 191, 796 (1961).
Krueger, P. J., Nature, 194, 1077 (1962).
Moritz, A. G., Spectrochim. Acta, 16, 1176 (1960).
Russell, R. A., and Thompson, H. W., Spectrochim. Acta, 8, 138 (1956).
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Moritz, A. G. (unpublished results).
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Orville-Thomas, W. J., Parsons, A. E., and Ogden, C. P., J. Chem. Soc., 1047 (1958).
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MORITZ, A. N–H Stretching Frequencies of Amines and Amides. Nature 195, 800 (1962). https://doi.org/10.1038/195800a0
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DOI: https://doi.org/10.1038/195800a0
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