Which of the following represents the (R)-ena | vedclass

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Question

(A) To determine the $(R)$ or $(S)$ configuration,we assign priorities to the groups attached to the chiral carbon based on the Cahn-Ingold-Prelog $(C

Vedclass · Accepted Answer

The structure with $D$ on the wedge,$Cl$ on the dash,and a $4$-chlorophenyl group.

Vedclass · Answer

(A) To determine the $(R)$ or $(S)$ configuration,we assign priorities to the groups attached to the chiral carbon based on the Cahn-Ingold-Prelog $(CIP)$ rules:$1$. $-Cl$ (atomic number $17$) has the highest priority $(1)$.$2$. The $4$-chlorophenyl group (attached to $C$ bonded to $C, C, H$) has priority $(2)$.$3$. $-D$ (deuterium,mass number $2$) has priority $(3)$.$4$. $-H$ (hydrogen,mass number $1$) has priority $(4)$.In the structure given in option $(A)$,the $Cl$ is on the dash (away from the viewer),$D$ is on the wedge (towards the viewer),and $H$ is in the plane. If we look down the $C-H$ bond,the sequence $1(Cl)$ $\rightarrow 2(phenyl)$ $\rightarrow 3(D)$ appears clockwise,which corresponds to the $(R)$-configuration. Thus,the structure in $(A)$ represents the $(R)$-enantiomer.

Which of the following represents the $(R)$-enantiomer of $1$-chloro-$1$-deutero-$1$-($4$-chlorophenyl)methane?

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