Questions: Rank the following in order of increasing leaving group ability, putting the worst leaving group first. H2O HO^- NH3 H2N^- I II III IV Multiple Choice IV < II < III < I III < IV < I < II

Rank the following in order of increasing leaving group ability, putting the worst leaving group first.

H2O
HO^-
NH3
H2N^-
I
II
III
IV

Multiple Choice
IV < II < III < I
III < IV < I < II

Transcript text: Chapter 7 Quiz i Saved Help Save \& Exit Submit Rank the following in order of increasing leaving group ability, putting the worst leaving group first. 18 $\mathrm{H}_{2} \mathrm{O}$ $\mathrm{HO}^{-}$ $\mathrm{NH}_{3}$ $\mathrm{H}_{2} \mathrm{~N}^{-}$ I II III IV Multiple Choice IV $<$ II $<$ III $<$ I \[ \text { III }<\text { IV }<\text { I }<\text { II } \]

Solution

Solution Steps

Step 1: Understand Leaving Group Ability

Leaving group ability is determined by the stability of the group after it leaves. A good leaving group is stable on its own, often as a weak base. The weaker the base, the better the leaving group.

Step 2: Analyze Each Group

$\mathrm{HO}^{-}$: Hydroxide ion is a strong base and thus a poor leaving group.
$\mathrm{H}_{2} \mathrm{~N}^{-}$: Amide ion is an even stronger base than hydroxide, making it a worse leaving group.
$\mathrm{NH}_{3}$: Ammonia is a weak base and a better leaving group than hydroxide.
$\mathrm{H}_{2} \mathrm{O}$: Water is a very weak base and a good leaving group.

Step 3: Rank the Groups

Rank the groups from worst to best leaving group ability: