Other Cases of Tautomerizations in Radical Cations

Obviously, the conditions of low-temperature spectroscopy are not relevant for any practical application of the knowledge that has been achieved through the studies described in this chapter. However, one-electron oxidation can also be effected under real conditions, for example, through photoinduced electron transfer to suitable acceptors, such as semiconductor particles that can later be separated from the reaction mixture. Under such circumstances it is likely that the tautomeric radical cations are being reduced and may act as (highly reactive) agents for Diels-Alder-type cycloadditions or other productive chemical reactions. We hope that this chapter will spur novel work in this field. 

Prof Edwin Haselbach, Director of the Institute of Physical Chemistry at the University of Fribourg, who gave me full liberty to conduct this research, jointly with our colleagues from Poland. 

Rappoport, Z. (1990) The Chemistry of Enols, John Wiley Sons, Ltd, Chichester. 

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