00:01
Okay, so in problem eight, you're asked to identify the leaving group and nucleophile in each of these reactions and predict the products.
00:11
So in part a, this is your substrate.
00:15
It's pre -bromo pentane, and you're asked to attack it with och2 -ch3.
00:24
I always draw these out in skeletal form just because i think it's easier to see than condensed form.
00:32
So this is going to attack in an s &2 fashion because this here, shown in blue, is the nucleophile.
00:40
Nucleophiles typical are the electron -rich species in a reaction.
00:44
They usually have a negative charge, but they don't have to, but they will always have either a lone pair or a pie bond.
00:50
The leaving group is what leaves the substrate, and in this case, shone and green, it's the bromine.
00:57
So for the products of this reaction, you would have something that's a protein.
01:02
That looks like this, because this nucleophile substrate has replaced the bromine, and the bromine has left.
01:21
Okay.
01:22
In part b, the reaction substrate is chloro -cyclohexane, and it's attacked with the nucleophile sodium hydroxide.
01:37
In organic chemistry, you can leave off the counter ion, which in this case is sodium.
01:41
So i'm just going to write the nucleophile, which in this case is hydroxide...