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Topic: NMR Charts. Please help me confirm my compound  (Read 3149 times)

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Offline captainmatt311

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NMR Charts. Please help me confirm my compound
« on: October 18, 2010, 06:45:45 PM »
Hi i have a couple of NMR and IR charts etc. that i received in my lab and i was just wondering if anyone could look over these and see if i identified my unknown compound correctly.
The second and third pictures are just close ups of the whole chart.

I think the compound is.. H-C=0-CH2-CH2-Ch2-CH3...Butyraldehyde


Thanks for your help

Offline willug

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Re: NMR Charts. Please help me confirm my compound
« Reply #1 on: October 18, 2010, 07:11:28 PM »
If you have a known compound, then it's always a good idea to compare with the literature. Sigma Aldrich has a lot of NMR and IR data on its website. Check here; http://www.sigmaaldrich.com/catalog/ProductDetail.do?lang=en&N4=20710|FLUKA&N5=SEARCH_CONCAT_PNO|BRAND_KEY&F=SPEC for your aldehyde..

Offline MissPhosgene

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Re: NMR Charts. Please help me confirm my compound
« Reply #2 on: October 18, 2010, 10:54:22 PM »
Integration can also help you make structural assignments.
Stereograms of the 32 crystallographic point groups: little bike wheels of cold, hard, pure rationality.

Offline discodermolide

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Re: NMR Charts. Please help me confirm my compound
« Reply #3 on: October 19, 2010, 03:47:52 AM »
Integration can also help you make structural assignments.
The spectra are integrated.

Your suggestion for butyraldehyde seems ok
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Offline AWK

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Re: NMR Charts. Please help me confirm my compound
« Reply #4 on: October 19, 2010, 04:52:22 AM »
3 x CH2 groups are in valeraldehyde (pentanal)
AWK

Offline MissPhosgene

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Re: NMR Charts. Please help me confirm my compound
« Reply #5 on: October 19, 2010, 11:28:22 PM »
Integration can also help you make structural assignments.
The spectra are integrated.

Your suggestion for butyraldehyde seems ok

Yeah, underneath. I looked on top of the peaks because I'm used to seeing them there and ppm below the peaks. Thanks!
Stereograms of the 32 crystallographic point groups: little bike wheels of cold, hard, pure rationality.

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