Which halogenoalkane reacts fastest with sodium hydroxide?
A. 1-iodobutane B. 1-chlorobutane C. 2-chloro-2-methylpropane D. 2-iodo-2-methylpropane
Iodine has a larger radius, thus less electronegative making it a better leaving group. And since OH is a protic substance it favors Sn1, which is a tertiary, so the answer must be d... but it says that the answer is b.. how????