00:01
This question asks us which of each of these pairs is a better nucleophile in the given solvent.
00:07
So for part a, we have bromine versus chlorine and water.
00:11
So remember that in product solvents like water, the more polarizable, the better the nucleophile.
00:19
So br is more polarizable than chlorine, so that will be a better nucleophile in water.
00:26
Then in part b, we are asked bromine versus chlorine in dmso.
00:30
So dmso is an a -protoxolvent, and in a -protoc solvents, the better base will be the stronger nucleophile.
00:38
So if we compare their conjugate acids, hbr versus h -dl, hbr is a stronger acid, so bromene is therefore a weaker base.
00:47
So chlorine will be stronger base and therefore the stronger nucleophile in an a -protecholvent like dmso.
00:54
For part c, we have methoxide versus methanol in water.
01:01
And so in general, something that is negatively charged will be a better nucleophile than something that is neutral.
01:07
So the methoxide will be the better nucleophile here.
01:10
For part d, again, we have methoxide versus methanol, but now in dmso.
01:15
And again, because it has a negative charge, methoxide will be the better nucleophile...