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Old 05-25-2019, 07:24 PM
 
170 posts, read 66,510 times
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These things have always confused me for some reason - I currently study them at university and I guess I have forgotten them from high school or something.
Anyway, it's about finding the molecule with the lowest or highest boiling point and determining whether it can have free rotation or not.

What methodology am I supposed to use for finding the lowest and highest boiling points?
The solutions that I have checked have brought up ion-ion bonds, van der Waals forces, molecular structure etc, but how can those things give me any clear information?
For example, how do I figure out if water or carbon dioxide has the highest boiling points this way?

Secondly, how do I know that there is free rotation around a molecule?
I have heard that triple bonds can have free rotation whereas double bonds cannot, since the π-bonds lock it into position or something like that...?
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Old 05-30-2019, 05:55 PM
 
Location: Pacific 🌉 N, 🌄W
11,038 posts, read 4,773,027 times
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Please review these links to find your answers.

Molecular orbital theory: conjugation and aromaticity

Bond Rotation

STEREOISOMERISM - GEOMETRIC ISOMERISM
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