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which is a better leaving group bromine or flourine and why?

which is a better leaving group bromine or flourine and why?
 

Grade:12th pass

1 Answers

Yash Arora
41 Points
8 years ago
for leaving group we see stability of negative charge on the group after it leaves the substrate 
 
for stability of charge in a period we see electronegativity and in a group we see size 
 
more electrinegative atom has more affinity for negative charge and big zie atom can easily accomodate charge hence more stable
 
here size of bromine is larger than size of flourine hence br minus is more stable than f- hence br is better leaving group 
 
 
please note the can be exceptions in f and Chlorine as f- size is lager than Cl- due to repultion
 
 
in chemistry halogens are mostly filled with exceptions 
 

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