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Issue 2, 1996
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Kinetic study of the stability of (NH2)2CSSC(NH2)22+


The kinetics of the decomposition of formamidine disulfide dihydrochloride, (NH2)2CSSC(NH2)22+ 2Cl, in aqueous solution at 25 °C are general base catalysed, and rate constants have been measured over the pH range 1.91–9.03. Analysis of the data yields ionisation constants pK1= 5.49, pK2= 7.66 and rate constants for deprotonation of the substrate by OH and H2O. For the doubly charged cation, reaction occurs through a small concentration of a reactive tautomer, (HN[double bond, length half m-dash])(NH3+)CSSC+(NH2)2, which is attacked by H2O. The singly charged cation reacts by parallel pathways involving OH and H2O as attacking bases.

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J. Chem. Soc., Perkin Trans. 2, 1996, 159-162
Article type

Kinetic study of the stability of (NH2)2CSSC(NH2)22+

L. G. Rio, C. G. Munkley and G. Stedman, J. Chem. Soc., Perkin Trans. 2, 1996, 159
DOI: 10.1039/P29960000159

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