Question

Question:What is the configuration of the asymmetric centers in the following compounds?

Short answer

1. The configuration of the centre is R.
2. 
3. 

Step-by-step solution

Definition of asymmetric centre

Asymmetric centres are those which has 4 different groups attached to them, that is,the chiral centres are called asymmetric centre.

determination of R, S nomenclature

1. The naming should be done according to the priority series.
2. If lowest group is in below the plane, the name of the chiral centre will be according to the direction of rotation.
3. If lowest group is in above the plane, the name of the chiral centre will be reversed to the direction of rotation.
4. Double bond will an atom has more priority than single bond.

explanation

asymmetric center must have four different groups attached to it, and only sp³ carbons

can be asymmetric centers. Therefore, we start by locating all the sp³ carbons in the following structures and name them according to rules,