What is the IUPAC name of the following compound?
A) (
R)-2,5-dimethylpentanamine
B) (
S)-5-methyl-2-hexanamine
C) (
R)-5-methyl-2-hexanamine
D) (
S)-2,5-dimethylpentanamine

Question

What is the IUPAC name of the following compound? 
A) (
R)-2,5-dimethylpentanamine 
B) (
S)-5-methyl-2-hexanamine 
C) (
R)-5-methyl-2-hexanamine 
D) (
S)-2,5-dimethylpentanamine

Quizplus · Accepted Answer

The longest carbon chain in the compound is six carbons long, so this is a hexane. There are two substituents on the second carbon (a methyl and an amine group), giving the name 2-amino-5-methylhexane. We use the R/S system to determine which enantiomer this is. The priority of the substituents on the second carbon are: NH2 (highest priority), CH3 (second priority), H (third priority). If we rotate the molecule so that the H is pointed away from us, the CH3 is on a wedge, and the NH2 is on a dash, we find that the molecule is oriented in the clockwise direction (R-configuration). Therefore, the name of the compound is (R)-5-methyl-2-hexanamine.

What Is the IUPAC Name of the Following Compound