Abstract The self-exchange rates and activation parameters in the (η 6-arene) 2 Cr 0/(η 6- arene) 2 Cr I systems (where arene= toluene, benzene, methoxylbenzene, biphenyl, ethylbenzoate and chlorobenzene) have been measured by the ESR line broaden ing technique in DMSO solvent. The one-electron reduction was investigated by cyclic voltammetry for the series of substituted complexes of (η 6-arene) 2 Cr I. A linear ...