Chapter 6: 6-26P (page 320)
Propose a mechanism involving a hydride shift or alkyl shift for each solvolysis reaction. Explain howeach rearrangement forms a more stable intermediate.
(a)

(b)

(c)

(d)

Short Answer
(a)

(b)

(c)

(d)

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Chapter 6: 6-26P (page 320)
Propose a mechanism involving a hydride shift or alkyl shift for each solvolysis reaction. Explain howeach rearrangement forms a more stable intermediate.
(a)

(b)

(c)

(d)

(a)

(b)

(c)

(d)

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Question: Using cyclohexane as one of your starting materials, show how you would synthesize the following compounds.

For each pair of compounds, predict which one has the higher molecular dipole moment, and explain your reasoning.
(a) ethyl chloride or ethyl iodide
(b) 1-bromopropane or cyclopropane
(c) cis-2,3-dibromobut-2-ene or trans-2,3-dibromobut-2-ene
(d) cis-1,2-dichlorocyclobutane or trans-1,3-dichlorocyclobutane.
When water is shaken with hexane, the two liquids separate into two phases. Which compound is present in the top phase, and which is present in the bottom phase? When water is shaken with chloroform, a similar two-phase system results. Again, which compound is present in each phase? Explain the difference in the two experiments. What do you expect to happen when water is shaken with ethanol (CH3CH2OH)?
Give the structures of the following compounds.
(a) Methylene chloride
(b) Carbon tetrachloride
(c) 3-iodo-2-methylpentane
(d) Chloroform
(e) 2-chloro-3-ethyl-2-methyhexane
(f) Isobutyl iodide
(g) Cis-1-chloro-3-(chloromethyl)cyclohexane
(h) Tert-butyl bromide
(a)Optically active 2-bromobutane undergoes racemization on treatment with a solution of KBr. Give a mechanism for this racemization.
(b)In contrast, optically active butan-2-ol does not racemize on treatment with a solution of KOH. Explain why a reaction like that in part (a) does not occur.
(c)Optically active butan-2-ol racemizes in dilute acid. Propose a mechanism for this racemization.
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