The influence of solvent structure on the solvolysis of a ruthenium(II) complex in water–acetonitrile mixtures
The solvent effect on the rate of aquation of trans-[Ru(py)4Cl2] has been investigated by u.v. spectroscopy in the 40–55 °C range in MeCN–H2O media. The thermodynamic activation parameters are calculated and discussed in terms of solvation effects. Log k was correlated with the reciprocal of the dielectric constant. A non-linear correlation was obtained and is discussed on the basis of specific solvation.