PRONOUNCED EFFECT OF INTERANNULAR TRIMETHYLENE BRIDGES ON THE RATE OFINTRAMOLECULAR ELECTRON-TRANSFER IN MIXED-VALENCE BIFERROCENIUM SALTS- A NOVEL ELECTRONIC GROUND-STATE OF FERROCENIUM CATIONS

X-ray structure determinations of two new constitutional isomers of bi ferrocene, the effects of interannular trimethylene bridges on intramo lecular electron-transfer rates in the solid state, and characterizati on of the electronic ground state of a series of ferrocenium cations a re reported.