CIDNP Study of Photoinduced [2+2] Cycloadditions (the Paterno- B chi Coupling) of Arylacetylenes and

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CIDNP techniques were applied to study the mechanism of photocycloadditions of 2-chloro-5-methoxybenzoquinone 1 with arylacetylenes 2-5 in benzene-d6 and acetonitrile-d6 respectively.
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