1,2-difluoroethane

[nothing123]

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It may just be getting late but I just read one solution that said 1,2-difluoroethane is nonpolar? How does that work? Out of fluoromethane and 1,2-difluoroethane, apparantly the former has more intermolecular forces? Explanation please...

Thanks.

 

[BerkReviewTeach]

It may just be getting late but I just read one solution that said 1,2-difluoroethane is nonpolar? How does that work? Out of fluoromethane and 1,2-difluoroethane, apparantly the former has more intermolecular forces? Explanation please...

Thanks.

If you consider a Newmann projection, the two fluorines on 1,2-difluoroethane can assume positions anti to one another and form a nonpolar conformational isomer. Because of free rotation about the C-C bond, it will not always be nonpolar, but it will be less polar than expected from a difluoro species

 

[nothing123]

Ah, very interesting! It seems like you have explanations to those Berkeley passages always ready haha. Thanks!

 

[BerkReviewTeach]

Ah, very interesting! It seems like you have explanations to those Berkeley passages always ready haha. Thanks!

Been answering some of the same questions for for about seven years it seems.

There are certain questions from BR text materials that get asked every session. It's when students ask about the new passages that makes me read and process the answer.

It also seems that I've been asked about the same AAMC questions and EK typos, but thankfully those stay the same year to year.