Question

Which one elutes first 3-methylcyclohexene or
1-methylcyclohexene in gas chromatography and why? (In terms of stationary phase / boiling point / retention time)

Answer 1

Answer:

3-methylcyclohexene

Explanation:

In gas chromatography, the compound with the lower boiling point will have shorter time in the gas phase, resulting in fewer theoretical plates and a decreased retention time. Once a product exits the column it is transferred to the graph after passing through a detector which picks up on the differing conductance of the carrier gas vs. the carrier gas and product