ochem ch 6 alkyl halides part 8 (halide halogenation SN2 SN1 nucleophile hydride shift saytzeff r

substitution

a mixutre of products is common (ex. E2 and Sn2, or E1 and Sn1)

very rarely; laboratory syntheses involving free radical halogenation are generally limited to specialized compounds that give a single major produc

• ex. 
• cyclohexane            bromocyclohexane
•                                 (50%)

In this example, each of the Hydrogen atoms are equivalent, so, if one uses a reasonable amount of Br2 so as to prevent the formation of di- and tri- molecules, the major product that one will get is bromocyclohexane.



Free radical bromination is highly selective and it gives good yields of products that have on type of hydrogen atom that is more reactive than the others.