Kinetics of the reactions of nickel(II) ion with dicarboxylic acids in dioxan–water

The kinetics of nickel(II) chelation with malonic acid and its methyl and n-butyl derivatives and with cyclopropane-1,1-dicarboxylic acid have been studied at 25 °C and ionic strength 0.10 mol dm–3 in dioxan–water (25 : 75 w/w) over a wide acidity range by the temperature-jump method. The kinetic data are discussed and compared with those obtained previously in water.