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Old May 25th 2017, 07:00 AM   #1
anoymous
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Exclamation urgent: help needed with analyzing a spectrum

so for the course spectroscopic methods, we had to make a H-NMR, IR and UV-vis, and we got a COSY and a C-NMR
the deadline is monday
these are the spectra (sorry idk how to embed if it is possible to embed):
IR:
https://puu.sh/w0L7Q/1a7bd4d9f6.png

H-NMR (+zooms):
https://puu.sh/w0Lbq/d4b55be515.png
https://puu.sh/w0Ljo/110abcece0.png
https://puu.sh/w0LmY/d60bf43b35.png
https://puu.sh/w0LoQ/925a006cdd.png
https://puu.sh/w0LrJ/6944942553.png

COSY:
https://puu.sh/w0Lw9/83ecd91b38.png

C-NMR:
https://puu.sh/w0Lyy/74df239aef.png

UV-VIS:
https://puu.sh/w0LGl/476f69484a.png

it was greenish and solid
b4 anyone asks: we didnt get a molar mass
thanks in advance

Last edited by anoymous; May 25th 2017 at 10:46 AM. Reason: bad sentences
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Old May 25th 2017, 08:00 AM   #2
anoymous
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the only thing (well, it's more than half of the signals) we could determine is that it's most likely a para substituted acetophenone
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Old May 25th 2017, 12:27 PM   #3
MatthijsM
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I'd say according to the IR, you have some OH group in there. But your spectra are not so nice tbh, are you sure you worked with 100% pure product?
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Old May 26th 2017, 01:37 AM   #4
anoymous
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Originally Posted by MatthijsM View Post
I'd say according to the IR, you have some OH group in there. But your spectra are not so nice tbh, are you sure you worked with 100% pure product?
those arent OH groups, that's the sp2 C-H vibrations
and we got the product like that in a blanco tube, pretty sure it's pure product (the HNMR for sure, as that was under strict supervision. we had no influence at all on the COSY and CNMR). as far as we know the product we got was bought and not synthesised in our own labo. (and it can be pretty expensive, another group got a product that costs over 100 dollars for like 10 grams)
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Old Jun 13th 2017, 12:27 PM   #5
anoymous
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for the ones who are curious what it was:
https://puu.sh/wj9u2/67dc962f63.png

and this is what we handed in, although we knew it was incorrect:
https://puu.sh/wj9q3/cd216a1729.png
we were so close...
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