Question

The absolute configuration of the given compound is:

• A. $R$
• B. $S$
• C. $E$
• D. $Z$

Answer 1

The correct option is A $R$



Lowest priority atom is always away from the viewer. Priority is seen on the basis of atomic number and if atomic no. are same then on the basis of atomic mass. If clockwise then it is $R$, if anticlockwise then it is $S$. Name of the molecule is, $\left(R\right)1-\text{bromo-1-chloroethane}$.