Abstract
The kinetics of oxygenation of [(EDTA)Ru III(H 2O)] − to [(EDTA)Ru v(O)] − by KHSO 5 was studied spectrophotometrically by following the appearance of characteristic peak of [(EDTA)Ru v(O)] − (ϵ 393 max = 8000) at a fixed pH of 6.0 and ionic strength 0.2 M (NaCiO 4). The time course of subsequent oxygen transfer from [(EDTA)Ru v(O)] − to cyclohexene and cyclooctene was investigated by following the decrease in the characteristic oxo peak at 393 nm as a function of substrate concentration and temperature (30–50 °C) at a constant pH of 6 and ionic strength 0.2 M (NaC1O 4). Activation parameters for both the oxygenation of [(EDTA)Ru III(H 2O)] − to [(EDTA)Ru v(O)] − and oxygen atom transfer from [(EDTA)Ru v(O)] − to cyclohexene and cyclooctene were determined and probable mechanisms for both reactions proposed.
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