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Topic: IR spectroscopy functional group determination?  (Read 1401 times)

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Offline AussieKenDoll

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IR spectroscopy functional group determination?
« on: March 08, 2019, 03:38:58 AM »
Look at the picture I attached, according to IR  spectrum there are C=O and 0-H bond at  1705 cm–1 and 3450 cm–1 respectively, but there are many peaks on the spectrum, what do they indicate?
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Offline Corribus

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Re: IR spectroscopy functional group determination?
« Reply #1 on: March 08, 2019, 10:38:41 AM »
You'll never be able to assign all them them definitively. Many of them correspond to various C-H stretches, bends, and rocking motions. You'll also have some absorptions related to C-O stretches and bends, and some C-C motions as well.
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Offline wildfyr

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Re: IR spectroscopy functional group determination?
« Reply #2 on: March 08, 2019, 01:30:34 PM »
The C-H stretches around 2950 can be somewhat well assigned, but after that it gets pretty difficult.
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