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ChemInform Abstract: Steric Inhibition of Photochemical Reactions: The (2 + 2)Cycloaddition Reaction.
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AbstractWhile irradiation of 1,2‐diphenylcyclobutene (I) at 350 nm in the presence of tetrachloroethylene (II) leads to the formation of the expected (2 + 2)cycloadduct (III), 1,2‐diphenyl‐3,3,4,4‐tetramethylcyclobutene (IV), 1,2‐diphenylcyclopentene (VIa), and 1,2‐diphenylcyclohexene (VIb) form the phenanthrene derivatives (V) and (VII) upon irradiation in the presence of tetrachloroethylene due to steric interaction.
Title: ChemInform Abstract: Steric Inhibition of Photochemical Reactions: The (2 + 2)Cycloaddition Reaction.
Description:
AbstractWhile irradiation of 1,2‐diphenylcyclobutene (I) at 350 nm in the presence of tetrachloroethylene (II) leads to the formation of the expected (2 + 2)cycloadduct (III), 1,2‐diphenyl‐3,3,4,4‐tetramethylcyclobutene (IV), 1,2‐diphenylcyclopentene (VIa), and 1,2‐diphenylcyclohexene (VIb) form the phenanthrene derivatives (V) and (VII) upon irradiation in the presence of tetrachloroethylene due to steric interaction.
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