Abstract
A JM acidity function has been measured for methanol–dimethyl sulphoxide mixtures containing 0·1 M-sodium methoxide in respect of methoxide addition to substituted anisoles. This allows the determination of the thermodynamic equilibrium constants for sodium methoxide addition in methanol to 1,5-dimethoxy-2,4-dinitrobenzene (3·8 × 10–6 l mol–1), 2,4-dinitroanisole (4·6 × 10–5 l mol–1), 2,6-dinitroanisole (9·0 × 10–5 l mol–1), 4-chloro-2,6-dinitroanisole (4·3 × 10–3 l mol–1) and 2-fluoro-4,6-dinitroanisole (0·3 l mol–1).
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