00:02
Part a.
00:04
The sturgeon xn.
00:05
It would look like this and how you would determine if it's rs is you assign priority numbers that relief to the atomic number of the adam that's bonded directly to the stereo center.
00:32
So you compare all of these nitrogen would have the highest atomic numbers.
00:36
That would be number one next.
00:41
You would look at these two carbons here and this carbon has an oxygen bond into it, so you would determine priority.
00:51
Secondly, by what groups are bonded to group that's bonded to the stereo center and oxygen has a higher atomic number than hydrogen would.
01:00
So this would be number two for three, and that would leave.
01:04
This is number four.
01:07
When you're trying to find our ness, you have to make sure that number four is always facing back in the group.
01:13
So it has this wedge dashed wedge, and what you can do to determine if it's rs is you.
01:20
Draw aero for 1 to 4 like that around one in two and three, and the orientation of the aero determines the type it iss.
01:35
If it's rs so it is going counter clockwise.
01:38
That means it would be s just this one was going clockwise.
01:42
Br yeah, for be.
01:49
It's a bit different that, and looking at this, it's actually a bit tougher than the other one.
02:14
Because if you're assigning priority numbers, um, so we'll start with you know, nitrogen has a highest one, so that would be one for the atomic number.
02:24
And then it would be this carbon because there's an oxygen double bonded to it, and then it would actually be this carbon for three.
02:35
And then this would before because this carbon has bonnets to other carbons.
02:46
But the issue with this one is that the carbon with the lowest priority number number four is not in the back.
02:54
So you can do is a nisi way to fix.
02:57
This is just to redraw the molecule.
02:58
But you can do is you can rotate this bond say, and it would flip these groups around, so then it would become if so, it stays the same, and the groups would be flipped around so you would have siege to here, carmen here, then the finish.
03:27
See extreme.
03:31
And then, um yeah, you can assign priority numbers.
03:35
They're the same as they were before, but now you'll notice that group four is in the back.
03:44
So then you can draw the arrow.
03:45
After that, it goes this direction from 1 to 2.
03:53
It doesn't have to be perfect...