00:01
Hello everyone, in this question, they have given four compounds for that we are going to identify this stereogenic center and we have to assign r and s nomenclature.
00:09
The first compound here they have given that is here we have oxygen and ch2, ch and here we have ch2 and here we have ch2, ch2, ch2 and here it is ch2 and here at this position we have above the plane we have chlorine atom and below the plane we have methyl group, below the plane we have methyl group.
00:40
Here the stereogenic center is this one is the stereogenic center, this carbon is stereogenic center.
00:45
So here the nomenclature of this compound is here this chlorine gets first priority and here this group this carbon gets second priority and here this carbon gets third priority and here methyl gets fourth priority.
01:04
So here it moves it moves anticlockwise direction so it is s configuration.
01:12
So it is s configuration and second compound is here they have given second compound in that they have given here it is ch double bond ch2 and here above the plane we have hydrogen and below the plane we have oh group and here we have methyl group.
01:38
So here oh group hydroxyl group gets first priority, alkyne gets second priority, methyl gets third priority, hydrogen gets fourth priority...