Stability V MP/BP

[211183]

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Trans is stable
But has a lower BP

what accounts for that discrepency??
I know the face, but just would like to understand it, I think my reasoning is a little messed up...

Trans is stable because it eliminates steric hinderance....so the molecule itself if stable
But in BP/MP we are talking about interaction wth other molecules like itself, and therefor, the polar molecules will be more stable?

I don't know.

 

[tranv117]

my thoughts on this is for example, trans 1,2-dichloroethane compared to cis. Trans is more stable because of the hindrance but lower bp because there are no net dipoles. dipole-dipole interactions will increase bp.

 

[Sea of ASH]

ya this is kinda tricky, trans has higher melting points becuz of there symmetry (stablity as you put it) but they also have lower boiling points becuz they are less polar!!!