H-nmr

[Kami]

In 1H-NMR spectrum, how many peaks will there be in m-xylene (1,3-dimethyl benzene? Can anyone explain?

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[Streetwolf]

Someone can correct me if I'm wrong... and I won't try to figure out shielding.

Four separate peaks.

Peak 1: H on carbon 2. Will be a singlet.
Peak 2: H on the methyl groups. Will be a singlet.
Peak 3: H on carbons 4 and 6. Will be a doublet.
Peak 4: H on carbon 5. Will be a triplet.

 

[Lonely Sol]

Someone can correct me if I'm wrong... and I won't try to figure out shielding.

Four separate peaks.

Peak 1: H on carbon 2. Will be a singlet.
Peak 2: H on the methyl groups. Will be a singlet.
Peak 3: H on carbons 4 and 6. Will be a doublet.
Peak 4: H on carbon 5. Will be a triplet.

It is correct, but would they ask you how far upfied they are located. If they do, then the most upfield signal should be Peak 1 and the most downfield signal should be peak 2.

Correct me if i am wrong!

 

[dr.rex]

my guess and from my experience there was not any NMR, mass spec or IR on the DAT so dont worry

 

[jfitzpat]

Without getting into specifics, I did have IR on my DAT, but it was a pretty easy problem. You should at least be familiar with them just in case.