1. Identify the Parent Chain:
* "Octane" tells us the parent chain has 8 carbon atoms.
2. Number the Carbon Chain:
* We need to number the carbons to locate the substituents.
3. Add the Substituents:
* 3-ethyl: An ethyl group (CH3CH2-) is attached to the third carbon.
* 2,5-dimethyl: Two methyl groups (CH3-) are attached to the second and fifth carbons.
4. Construct the Condensed Formula:
* CH3CH(CH3)CH(CH2CH3)CH2CH(CH3)CH2CH3
Explanation:
* The main chain (octane) is represented as CH3CH2CH2CH2CH2CH2CH2CH3.
* The ethyl group (CH2CH3) is attached to the third carbon.
* The methyl groups (CH3) are attached to the second and fifth carbons.
Therefore, the condensed structural formula for 3-ethyl-2,5-dimethyloctane is CH3CH(CH3)CH(CH2CH3)CH2CH(CH3)CH2CH3.
