Abstract
Analytical expressions have been derived for the vertical detachment energy (VDE) for hydrated sulphate (SO2 −4) and oxalate (C2O2 −4) dianions that can be used to calculate the same over a wide range of cluster sizes including the bulk from the knowledge of VDE for a finite number of stable clusters. The calculated bulk detachment energies are found to be very good in agreement (within 5%) with the available experimental results for both the systems. It is observed that two or more water molecules will be essential for the stability of sulphate and oxalate dianions against spontaneous electron loss and this is consistent with the experiment. We have, for the first time, provided a scheme to calculate the radius of the solvent berg for sulphate and oxalate dianions. The calculated conductivity values for the sulphate and oxalate dianions using Stokes–Einstein relation and the radius of solvent berg are found to be very good in agreement (within 4%) with the available experimental results.
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