Steric Effects in Photoinduced Electron Transfer Reaction of Halogenated 1,4-Benzoquinones with Donor Olefins.

The photoinduced electron transfer reaction of halogenated 1,4-benzoquinones with 2,3-dimethyl-2-butene or 3,4-dimethyl-2-pentene gave the primary, secondary, and tertiary monoallyl ethers of hydroquinones, with the product distributions highly dependent on the steric nature of quinones and olefins.