SCIENCE
CHEMISTRY
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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2-chloro-2-methylpropane
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2-iodo-2-methylpropane
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1-chlorobutane
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1-iodobutane
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Detailed explanation-1: -The answer is option c. Tertiary alkyl halides react faster than primary alkyl halides in SN1 S N 1 reactions.
Detailed explanation-2: -Heavily halogenated halogenoalkanes are used in some fire extinguishers. We find that the 1-iodobutane reacts fastest as the C-I bond is the weakest of the C-Hal bonds and so breaks easiest and fastest.
Detailed explanation-3: -Tertiary haloakanes react via an sN1 mechanism that has a much lower activation energy than the sN2 mechanism with the high energy transition state. Hence tertiary haloalkanes react faster then secondary, which in turn react faster than primary.
Detailed explanation-4: -The reactivity of halogenoalkanes depends on the type of halogen present. Generally, the reactivity decreases in the order: fluorine > chlorine > bromine > iodine.