October 6, 2021 at 2 PM Eastern/11 AM Pacific
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When comparing alkynes, alkenes, and alkanes of similar molecular weight and structure(unbranched), I am pretty sure alkynes will have the highest boiling point due to the fact of increased electron density from your pi orbitals. It is more "polarizable" so you have an increased dipole-dipole interaction between molecules thus increasing bp. I think that sounds right, what do you think?
it would be really close to call. there isnt much of a diff. all i can think of is to add to post #2 and that cuz the alkyne is planar it will have higher dipole dipole interaction. although the alkene is planar its dipole wont be as strong as that of the alkyne. that would be my reasoning, i could be wrong.