Question

What is the molecule shown below?

A. 2,3-methylpentane
B. 3-propylbutane
C. Heptane
D. 2-butylpropane

Answer 1

The compound can be seen as 2,3 methylpentane. Option A

What is IUPAC nomenclature?

When naming organic compounds, the nomenclature takes the molecule's structure, functional groups, and substituents into account. The primary goal of IUPAC nomenclature is to provide a standardized and unambiguous way to name chemical compounds, facilitating clear communication among scientists globally.

We can see that the longest chain here belongs to pentane and that there are substituents at the 2 and the 3 positions in the molecule.

Answer 2

2,3–dimethylpentane

Step-by-step explanation:

To know which option is correct, we shall determine the name of the compound.

To obtain the name of the compound, do the following:

1. Determine the longest continuous carbon chain. This gives the parent name of the compound.

2. Identify the substituent group attached to the compound.

3. Locate the position of the substituent group by giving it the lowest possible count.

4. Combine the above to obtain the name of the compound.

Now, we shall determine the name of the compound as follow:

1. The longest continuous carbon chain is 5. Thus, the parent name of the compound is pentane.

2. The substituent group attached is methyl (–CH₃)

3. There are two methyl group attached to the compound. One is located at carbon 2 and the other at carbon 3.

4. Therefore, the name of the compound is:

2,3–dimethylpentane

None of the options are correct.