IR and NMR spectroscopy

[Bronco2011]

How many people saw topics on these come up on your exams? I am debating on memorizing all of them or just deciding to take an educated guess on them if they are uncommon on the real DAT?

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[john616]

I had 2 NMR questions on mine but no IR...

 

[squigloo]

The IR numbers aren't too difficult to memorize. The hardest part is just telling between an aldehyde, acid, or ketone. You can probably do NMR without knowing what numbers mean what, but knowing that makes the problems much easier.

 

[denttal]

Squigloo, what do you mean it's difficult to tell btwn aldehyde, acid, ketone?

For IR: Aldehyde has 2 peaks at 2710 and 2810. A ketone (carbonyl) has one peak around 1710. The acid will have an ugly, broad peak at 2500-3500. The numbers seem to be pretty spread apart and the acid -OH will be super broad. but maybe I haven't come across a difficult enough problem yet?

 

[bimmer]

I had no NMR at all...