Abstract
COBALT complexes of glycylglycine are of considerable importance in connexion with the activation of glycylglycine dipeptidase by cobalt ions1. Following early work by Smith2, Gilbert, Otey and Price3 studied the oxidation of cobaltous glycylglycine complexes and isolated a red complex to which the formula [(GGH)2CoO2Co(GGH)2] was assigned (the neutral glycylglycine molecule is abbreviated as GGH2). Later studies4 showed that an intermediate brown complex was formed at high pH which was converted to the red complex on lowering the pH. A polarographic study5 found no evidence for a peroxy group in the red complex, it being suggested that the complex contained hydroxy groups as ligands.
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References
Hay, R. W., Rev. Pure App. Chem., 13, 157 (1963).
Smith, E. L., J. Biol. Chem., 173, 571 (1948).
Gilbert, T. B., Otey, M. C., and Price, V. E., J. Biol. Chem., 190, 377 (1951).
Tanford, C., Kirk, P. C., and Chantooni, M. K., J. Amer. Chem. Soc., 76, 5325 (1954).
Caglioti, V., Silvestroni, P., and Furlani, C., J. Inorg. Nucl. Chem., 13, 95 (1960).
Strandberg, B., Lindqvist, I., and Rosenstein, R., Zeit. f. Kristalog., 116, 255 (1961).
Hughes, E. W., and Moore, W. J., J. Amer. Chem. Soc., 71, 2618 (1949).
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GILLARD, R., MCKENZIE, E., MASON, R. et al. Structure of a bisGlycylglycinate-cobalt(III) Complex. Nature 209, 1347–1348 (1966). https://doi.org/10.1038/2091347a0
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DOI: https://doi.org/10.1038/2091347a0
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