(Solved): 10. Consider the SN2 reaction of butyl bromide with OHion. CH3CH2CH2CH2Br+OH ...

10. Consider the ${\mathrm{S}}_{\mathrm{N}}2$ reaction of butyl bromide with ${\mathrm{OH}}^{-}$ion. ${\mathrm{CH}}_3{\mathrm{CH}}_2{\mathrm{CH}}_2{\mathrm{CH}}_2\mathrm{Br}+{\mathrm{OH}}^{-}⟶{\mathrm{CH}}_3{\mathrm{CH}}_2{\mathrm{CH}}_2{\mathrm{CH}}_2\mathrm{OH}+{\mathrm{Br}}^{-}$ Assuming no other changes, what effect on the rate would result from simultaneously doubling the concentrations of both butyl bromide and ${\mathrm{OH}}^{-}$ion? a. No effect. b. It would double the rate. c. It would triple the rate. d. It would increase the rate four times. e. It would increase the rate six times. 11. Which alkyl halide would you expect to undergo $s_{n}1$ hydrolysis most rapidly? a. ${\left({\mathrm{CH}}_3\right)}_3\mathrm{CI}$ b. ${\left({\mathrm{CH}}_3\right)}_3\mathrm{CBr}$ c. ${\left({\mathrm{CH}}_3\right)}_3\mathrm{CCl}$ d. ${\left({\mathrm{CH}}_3\right)}_3\mathrm{CF}$ e. They would all react at the same rate. 12. Carbocations are frequent intermediates in acidic reactions of alkenes, alcohols, etc. What do carbocations usually do? They may: a. rearrange to a more stable carbocation. b. lose a proton to form an alkene. c. combine with a nucleophile. d. react with an alkene to form a larger carbocation. e. do all of these. 13. The structure of the product, $C$, of the following sequence of reactions would be: a. cis $-{\mathrm{CH}}_3{\mathrm{CH}}_2\mathrm{CH}-{\mathrm{CHC}}_6{\mathrm{H}}_5$ b. $\mathrm{Cis}-{\mathrm{CH}}_3\mathrm{CH}-{\mathrm{CHC}}_6{\mathrm{H}}_5$ c. trans $-{\mathrm{CH}}_3{\mathrm{CH}}_2\mathrm{CH}-{\mathrm{CHC}}_6{\mathrm{H}}_5$ d. ${\mathrm{C}}_6{\mathrm{H}}_5\mathrm{C}\equiv {\mathrm{CCH}}_2{\mathrm{CH}}_2\mathrm{Br}$ e. ${\mathrm{C}}_6{\mathrm{H}}_5\mathrm{C}={\mathrm{CCH}}_2{\mathrm{CH}}_3$