(Solved): The reaction of bromomethane with sodium hydroxide in water forms methanol via the reaction: (a) CH ...

The reaction of bromomethane with sodium hydroxide in water forms methanol via the reaction: (a) ${\mathrm{CH}}_3\mathrm{Br}+\mathrm{HO}?{\mathrm{CH}}_3\mathrm{OH}+\mathrm{Br}$ However, if sodium iodide is added to the experiment, the rate of methanol formation is dramatically increased where both of the following reactions are occurring: (b) $\begin{array}{l}{\mathrm{CH}}_3\mathrm{Br}+{\mathrm{I}}^{?}?{\mathrm{CH}}_3\mathrm{I}+\mathrm{Br}\\ {\mathrm{CH}}_3\mathrm{I}+\mathrm{HO}?{\mathrm{CH}}_3\mathrm{OH}+{\mathrm{I}}^{?}\end{array}$ Both reaction pathways (a) and (b) from bromomethane to methanol are shown on the energy diagram. What chemical species is represented at the energy level marked by the star? Select one: ${\mathrm{CH}}_3\mathrm{l}$ Transition state formed by the reaction of ${\mathrm{CH}}_3\mathrm{Br}$ and ${\mathrm{F}}^{\text{- }}$ Transition state formed by the reaction ${\mathrm{CH}}_3\mathrm{Br}$ and ${\mathrm{HO}}^{?}$ Transition state formed by the reaction ${\mathrm{CH}}_3$ and ${\mathrm{HO}}^{?}$