Phenylacetylene (A) reacts with excited sensitizers (S) to produce radical ions (S)·–, (A)·+, which react as geminate or separated pairs with (A) to give a dimeric radical cation (A+–·A); the latter reacts with nitriles to give pyridines (1) or with nitromethane leading to an oxidation product (2) and a dimer (1-phenylnaphthalene) is also formed via the geminate pair.
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Journal of the Chemical Society, Chemical Communications
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