Which of the following alkyl halides is most likely to undergo rearrangement in an sn1 reaction?

(a) 1-bromo-4-methylcyclohexane

(b) 2-chloro-3,3-dimethylpentane

(c) 3-bromopentane

(d) bromocyclohexan

(b) 2-chloro-3,3-dimethylpentane

Explanation:

A rearrangement occurs in a SN1 reaction when the carbocation is formed. More substituted carbocations are more stable because of the electron-donating effect of alkyl groups and the hyperconjugation.

An alkyl halide with a carbon more substituted than the carbon where is the C-X bond, is most likely to undergo rearrangement.

(a) 1-bromo-4-methylcyclohexane

In this molecule could occur a rearrangement but the carbocation need to jump three bonds.

(b) 2-chloro-3,3-dimethylpentane

This alkyl halide is most likely to occur a rearrangement because the near carbon is a quaternary carbon.

(c) 3-bromopentane

Can't occur a rearrangement because all carbons are secondary

(d) bromocyclohexane

Also, can't occur a rearrangement because all carbons are secondary.

Thus, the most likely to undergo rearrangement in an SN1 reaction is (b) 2-chloro-3,3-dimethylpentane

I hope it helps!

2h2o2--> 2h2o + o2

this reaction is of the spontaneous decomposition of hydrogen peroxide down into water and oxygen.

add 2 molecules of hydrogen peroxide and 2 molecules of water. since oxygen is naturally diatomic, the total number of atoms of each element is now the same on both sides of the equation so it is balanced.

this may not be entirely correct but let me know.