Steric effects in free-radical hydrogen atom abstraction reactions Public Deposited

http://ir.library.oregonstate.edu/concern/graduate_thesis_or_dissertations/db78tg751

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  • A study of the relative rates of benzylic hydrogen abstractions from a series of meta and para substituted neopentylbenzenes by the bromine radical and trichloromethyl radical at 70°C has been carried out. Application of the Hammett equation yields p values of -0.75 for the bromine atom and -0.94 for the trichloromethyl radical. Steric hinderance in proceeding to the transition state is offered as a possible explanation for the large substituent dependence exhibited by the trichloromethyl radical.
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