How would you use chromatography to determine whether an unknown pure liquid....

[UKWildcat]

Homework Statement

How would you use chromatography to determine whether an unknown pure liquid is 1-pentene, cis-2-pentene, or trans-2-pentene?

Homework Equations

The Attempt at a Solution

I looked up the boiling points of the three and see that 1-pentene is lower, but the cis and trans pentene are similar. This is where I am stuck.

 

[Borek]

I can be wrong, but seems to me like best method would be to compare retention time with known sample of substances in question. When you have a single substance and no reference, determining what the unknown is is like reading the dregs.

 

[chemisttree]

The title is "GC help" but the question doesn't specify that you utilize gas-liquid chromatography. Also, GC separations are largely a function of BP but polarity plays a part as well.