Abstract
AN interest in reactive reducing agents has led us to investigate aqueous solutions of chromium(II) containing excess of polyamines. We have observed that, in the absence of oxygen, these deep blue solutions (pH > 9) evolve hydrogen in accordance with the reaction : Although the reaction is quite slow when the amine is ethylenediamine or diethylenetriamine1, with purified triethylenetetramine or tris(β-aminoethyl)amine2 the reaction is sufficiently rapid to be studied conveniently. It is apparently autocatalytic with excess of the linear tetramine, and first-order in chromium(II) when the branched amine is present.
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Reaction in aqueous ethylenediamine solution is sufficiently slow to allow determination of complex stability constants. Pecsok, R. L., and Bjerrum, J., Acta Chem. Scand., 11, 1419 (1957).
Jonassen, H. B., and Strickland, G. T., J. Amer. Chem. Soc., 80, 312 (1958).
Ardon, M., and Plane, R. A., J. Amer. Chem. Soc., 81, 3197 (1959).
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KOPPLE, K., SVATOS, G. & TAUBE, H. Oxidation of Chromium(II) Amines by Water. Nature 189, 393 (1961). https://doi.org/10.1038/189393a0
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DOI: https://doi.org/10.1038/189393a0
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