Irradiation (254 nm) of (MeO)2P(S)SMe in ROH yields mainly (66%, R = Pri) the ionic photosolvolysis product (MeO)2P(S)OR with the very low capture ratio 1·9 ± 0·4 for R = Me vs. R = Pri under competitive photosolvolysis conditions, whereas irradiation in e.g. tetrahydrofuran and CH2Cl2 gives free-radical products, suggesting that the photoreactions proceed by way of an ‘intimate radical-ion pair.’
H. P. Benschop, C. A. G. Konings, D. H. J. M. Platenburg and R. Deen, J. Chem. Soc., Chem. Commun., 1980, 370 DOI: 10.1039/C39800000370
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