5059

Write the structure(s) of the major organic product(s) in each case in the space provided below:

(a)

(b)

(c)

5178

Using appropriate cyclohexane ring conformations, explain the following experimental observations for the elimination reactions shown:

whereas

5363

Write an E2 mechanism for each of the following reactions.

(a)

(b)

5364

Explain the observation that cis-2-phenylcyclohexyl tosylate undergoes elimination of tosylic acid (TsOH) about 10⁴ times faster than does the trans isomer. Use structures.