Difference between Chlorination & Bromination

The first step of the propagation step is _________ in both cases

rate determining

If X=Cl → _____

exothermic

If X=Br → ______

endothermic

-_______ is faster than _______

-Chlorination ______ regioselective & forms a mixture of chlorinated products, while bromination yeilds __________ brominated product

-chlorination, bromination

-is not, one major

Reactivity-selectivity principle: less negative reagents are ______ selective

more

Halogenation of an achiral S.M> generates a _________ mixture of _______

racemic, enantiomers

Halogenation of a stereogenic center leads to the _______ of that stereogenic center

racemization