Abstract
THE fact that vitamin B12 is diamagnetic indicates that the cobalt atom in the molecule is trivalent1. It can be assumed that it is at a lower valency state in at least some of the products which have been obtained from vitamin B12 by reducing agents2,3. This has been confirmed by polarographic measurements4. However, so far as we know, a direct determination of the valency of the cobalt atom in a reduction product (for example, by magnetic methods) has not been done hitherto.
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References
Grün, F., and Menassé, R., Experientia, 6, 263 (1950). Diehl, H., Vander Haar, R. W., and Sealock, R. R., J. Amer. Chem. Soc., 72, 5312 (1950). Wallmann, J. C., Cunningham, B. B., and Calvin, M., Science, 113, 55 (1951).
Kaczka, E., Wolf, D. E., and Folkers, K., J. Amer. Chem. Soc., 71, 1514 (1949). Brockman, jun., J. A., Pierce, J. V., Stokstad, E. L. R., Broquist, H. P., and Jukes, T. H., J. Amer. Chem. Soc., 72, 1042 (1950).
Schindler, O., Helv. Chim. Acta, 34, 1356 (1951).
Diehl, H., Morrison, J. I., and Sealock, R. R., Experientia, 7, 60 (1951). Schindler, O., loc. cit., p. 1357.
Boehm, G., Z. Naturforsch., 9 b, 509 (1954).
Pauling, L., and co-workers, for example, in Selwood, “Magneto-chemistry” (Interscience, New York, 1943).
Theorell, H., Experientia, 4, 100 (1948).
Todd, A. R., et al., Nature, 176, 328 (1955).
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GRÜN, F., HAAS, R. Paramagnetism of a Reduction Product of Vitamin B12 . Nature 177, 378–379 (1956). https://doi.org/10.1038/177378a0
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DOI: https://doi.org/10.1038/177378a0
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