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Topic: Two Unknowns with Spectra  (Read 3811 times)

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Offline mbrewster

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Two Unknowns with Spectra
« on: April 23, 2016, 11:35:29 AM »
Hello everyone,

I am new to this forum, and am curious if I could have some help analyzing two unknowns. I have a couple guesses as to what they could be, but would also be curious for some input as well. The first is a liquid compound, and I ran an IR, 1H NMR, C13 and DEPT. I know that this is some sort of ethyl ester, and I initially thought ethyl acrylate. But I am curious about all of the CH's on the DEPT. Could this indicate a benzene even though the overtones do not show up on IR? I have attached images of my spectra to this post.


I greatly appreciate any feedback! Thank you for your time!
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Offline critzz

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Re: Two Unknowns with Spectra
« Reply #1 on: April 23, 2016, 06:30:11 PM »
Generally, NMR-spectra are much more reliable than IR-spectra for assigning a compound. This IR-spectrum's quality in particular does look a bit off. :P

The H-NMR does also give a clue.

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Offline mbrewster

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Re: Two Unknowns with Spectra
« Reply #2 on: April 23, 2016, 10:47:15 PM »
What clue is it that you see? I'm not sure what you mean...
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Offline critzz

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Re: Two Unknowns with Spectra
« Reply #3 on: April 24, 2016, 03:33:10 PM »
An integral of ~5.0 at around 7 ppm. By the way, you did measure your sample in deuterated chloroform right?
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