Memorize all the IR and NMR values??

[pineappletree]

important question~

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[UDPreMed]

i think that IR is more important than NMR to memorize. But with IR, there should only be 3ish peaks-carbonyl, alcohol, and another one that i can't quite think of now...good luck, i hope that helps!

 

[Rayhaan]

3400ish OH
1700ish C=O

Know those 2 basically for IR, the others should be given to you in the passage. Obviously knowing more may help you speed through some questions but it doesn't seem necessary besides the above 2. Um and for NMR I don't think you need to know any specifics. I guess aldehyde hydrogen and OH?

 

[ShinyDome19]

3400ish OH
1700ish C=O

Know those 2 basically for IR, the others should be given to you in the passage. Obviously knowing more may help you speed through some questions but it doesn't seem necessary besides the above 2. Um and for NMR I don't think you need to know any specifics. I guess aldehyde hydrogen and OH?

👍+1

 

[BearDownAZ]

👍+1

It might be helpful to know C=C

 

[coach55]

important question~

I don't think you need to memorize all the peaks. Look at your old orgo exams & practice passages and just redo them again.

 

[NickNaylor]

As others mentioned, I don't think you need to memorize NMR values. You'll want to the IR values for aldehydes, saturated C-H bonds, the alcohol stretch, and maybe the alkene peak.

 

[RevMD]

3400ish broad OH
1700ish sharp C=O

These two are pretty much all you need to know for IR spec.

For H-NMR, know at least the basics on relative shift, coupling, etc. Know the approximate shift locations for the major functional groups, like carbonyl, aldehyde, and alkene, but do not go overboard in memorizing every single one. Very rarely, you might get one question that gives you a simple compound and determine the NMR spec graph for it, or vice versa.

 

[funklab]

3400ish broad OH
1700ish sharp C=O

These two are pretty much all you need to know for IR spec.

For H-NMR, know at least the basics on relative shift, coupling, etc. Know the approximate shift locations for the major functional groups, like carbonyl, aldehyde, and alkene, but do not go overboard in memorizing every single one.

I highly doubt that they will expect you to interpret a C13 NMR that precisely. Has anyone ever seen an actual MCAT question which expected you to know C-NMR shifts?

 

[AlexB]

definitely know alkenes, in addition to the others that people that have mentioned.

 

[AnthroMD]

Nope, never seen one. I think having to know the shifts would be beyond the scope of the MCAT.

I highly doubt that they will expect you to interpret a C13 NMR that precisely. Has anyone ever seen an actual MCAT question which expected you to know C-NMR shifts?

 

[MCAT4life]

ya TBR ochem made you know a lot of them, now I think about it most questions on the AAMC tests were about the OH/C=O peaks on IR.

 

[pick8]

I would have said no to your question until I took my MCAT. One of the questions literally showed a molecule, and asked you for the approximate shift of one of the hydrogens. I couldn't believe it, but it was a question. I'd say the chances of getting a question like that are quite slim, but then again it happened to me, so maybe it's worth knowing them.

As for IR values, I'd know the big ones. C=O, -OH definitely. Alkenes and alkynes probably also important. Certainly wouldn't hurt to have an idea about the rest, too, but they're probably less likely to show up.

 

[pick8]

ack, double post sorry. please delete.