Kinetics and mechanism of the oxidation of hypophosphite with N-chlorotoluene-p-sulphonamide (chloramine T) catalysed by osmium (VIII) in alkaline solution
Abstract
The kinetics of osmium(VIII)-catalysed oxidation of hypophosphite, H2PO2–, with chloramine T (cat, N-chlorotoluene-p-sulphamide) was studied by estimating the latter iodometrically. The rate law (i) holds for [OH–]= 0.02–0.142, [H2PO2–]= 0.001–0.002, and [OsVIII]= 1 × 10–5 to 1 × 10–4 mol dm–3 where k1 is defined by equation (ii), k2 and k3 are the equilibrium formation constants ≳