0Configuration is the relative position of the atoms in amolecule that can be arranged / changed exclusively by cleaving and forming new chemical bonds.
Steps to assign configurations:
Follow the direction of the remaining 3 priorities from highest to lowest priority (lowest to highest number, 1 < 2 < 3). A counterclockwise direction is an S (Latin for sinister, left) configuration. A clockwise direction is an R (Latin for rectus, right) configuration.
Approach:
According to the molecular weight of the attached groups in the ascending order, we no. 1, 2, 3, 4. If the numbers are not arranged in a particlar order clockwise or anticlockwise, we interchange the 2 groups so that the numbers can be arranged in increasing order clockwise or anticlockwise.
Answer: All the above compounds have R configuration.
