Question

question 9 of 30
what is the molecule shown below?

h ch₃ h h h h h

h−c−c−c−c−c−c−h

h h ch₃ h h h h

a. 2-pentylpropane
b. 2,3-dimethylhexane
c. 4-propylpentane
d. octane

Explanation:

Step1: Identify the longest carbon chain

The longest continuous carbon chain in the given structure has 6 carbon atoms (hexane backbone).

Step2: Identify substituents and their positions

There are two methyl groups ($-CH_3$). One is attached to the 2nd carbon and the other to the 3rd carbon of the hexane chain.

Step3: Name the compound

Using IUPAC nomenclature, the compound is named by indicating the number of substituents, their type (methyl), their positions (2 and 3), and the parent chain (hexane). So it is 2,3 - dimethylhexane.

Answer:

B. 2,3 - dimethylhexane