00:01
Use the following molecules.
00:02
Let's identify the indicated faces.
00:04
The carbon atoms is either re or s -i.
00:08
Re is going to be if the curved arrow drawn from the highest to second highest ranked substituent is clockwise.
00:48
Then we say that the corality center is re.
00:53
And for an si, if the curved arrow drawn from the highest to second highest, ranked substituent is counterclockwise, then it would have an si configuration.
01:32
So for a, we're going to be looking at hydroxyacetone.
01:38
So hydroxyacetone.
01:51
Let's rank our substituents here.
01:56
So we rank our substituents.
02:03
Priority one, priority two, priority three...