Sulfamic acid, reaction mechanism

Hydrolysis of Sulfamate (SAM). The kinetics of hydrolysis of sulfamate ion was investigated by Maron and Berens (22) (in dilute acid at 80-98°C) and by Candlin and Wilkins (23) (in 10 3 M to 6 M perchloric acid at 95°C). A reaction mechanism involving a pre-equilibrium between sulfamate ion and sulfamic acid (Eq. 24), followed by slow hydrolysis of the acid (Eq. 25), was proposed ... 

Reaction of Sulfamic Acid with Nitrous Acid. A kinetic study of the reaction of sulfamic acid with nitrous acid (Eq. 27) by Hughes (27) revealed that the mechanism... 

Experiments were carried out with different oxydation states of nitrogen to try to identify the species that are active in the different mechanisms. The approach chosen was to react phenol with NIII, NIV and NV in water and in organic media and to observe the different products that are formed. This basic procedure which seems simple needs to be undertaken caustiously. Nitrophenols are very pourly soluble in water (2 g/1 for orthonitrophenol at 20 °C) and tends to demix from water giving two liquid phases. Since this reaction is considered to be messy, one must be sure that the carbon balance is correct so to avoid misinterpretation. All the reactions were carried out in relative dilute state (1 %) and reaction medias are quenched with aqueous cold water containing sulfamic acid to destroy nitrous oxydes, and titration of products is done throught HPLC analysis. 

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