The relative rates of the Rh(II)-mediated carbenoid insertion into the benzylic C-H bonds of a series of para-substituted phenyl substrates have been measured by an indirect intramolecular competition method. Three catalysts, rhodium(II) acetate, rhodium(II) trifluoroacetate, and rhodium(II) acetamide, were investigated. The effect of solvent was also studied on the reactions with rhodium(II) a...

The paper is an overview of the application of the concept of linear free energy relationships (LFER), most notably through the Hammett equation, to investigations of reversible organic electrochemical reactions in aprotic solvents. In sequence the following topics are covered: the effect of solvent properties on the equilibrium, ion pairing effects, the direct application of Hammett's equation...