Prediction of Internuclear Distances of Di-atoms


SEVENTEEN years ago1, on the basis of my proposed modification of the Morse rule connecting fundamental vibration frequency and internuclear distance of di-atoms, I ventured to predict internuclear distances for certain cases which had not then been determined experimentally. The accompanying table compares the values predicted for di-atoms of the KKpp sub-period with experimental results given in a new table due to Herzberg2. In some cases, the fundamental frequencies on which the calculations depend have been shifted by a few wave-numbers. In spite of these small corrections, it is judged sufficient to make direct comparison between the two sets of numbers without further calculation.

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  1. 1

    Clark, C. H. Douglas, Phil. Mag., 18, 459 (1934); Nature, 133, 873 (1934).

  2. 2

    Herzberg, G., “Molecular Spectra and Molecular Structure. I. Spectra of Diatomic Molecules” (D. van Nostrand Co., Inc., New York; second edit., 1950).

  3. 3

    Clark, C. H. Douglas, and Stoves, J. L., Phil. Mag., 27, 389 (1939).

  4. 4

    Clark, C. H. Douglas, and Webb, K. R., Trans. Farad. Soc., 37, 293 (1941).

  5. 5

    Clark, C. H. Douglas, Trans. Farad. Soc., 31, 1017 (1935).

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CLARK, C. Prediction of Internuclear Distances of Di-atoms. Nature 168, 911–912 (1951).

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