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Effect of the solvent polarity (εr= dielectric constant values30) on the reactivity and chemoselectivity of MnSalen 2 at 4°C. The following solvents have been used: benzene (εr= 2.3), acetonitrile (εr= 36.6), methanol (εr= 33.0), ethanol (εr= 25.3), and methylene chloride (εr= 8.9).
