Abstract: The electron transfer process from dicyclopentadine to chloronil in different solvents (acetone-d₆, methonal-d₄, acetonitrol-d₃) has been studied by CIDNP method, using 355nm laser source. Similar CIDNP effects were observed indicating the same radical intermediate in this photo-reaction process. In comparison of the simulated CIDNP spectra with the experimental results, we obtained the relative values of hfc and the spin density of uncoupled electrons of atom C in this intermediate proposed by Roth.

Key words: Dicyclopentadine, Photo-induced, Radical reaction, CIDNP effect