Sciencemadness Discussion Board

NMR help

anoopai - 9-5-2013 at 10:25

hi all,
I got some compounds nmr, but dont giving any groups tests, can anyone give its hint , if so i will post my nmr data

Hexavalent - 9-5-2013 at 11:27

Have you even attempted to read the spectra yourself? You seem to have a habit of posting work for others, without even attempting it first yourself.

Post them, and we can help you.

anoopai - 9-5-2013 at 17:29

first two i think they are terpenoids with sugar attachements, rest dont have clue.
These are my spectral values

Attachment: sp.txt (3kB)
This file has been downloaded 698 times

Acidum - 10-5-2013 at 10:35

You know that in order to solve NMR spectra of such complex compounds one needs not only values but also more informations like multiplicity of signals (singlet/doublet/...) and coupling of signals...

anoopai - 10-5-2013 at 20:31

CPD9 C13

[Edited on 11-5-2013 by anoopai]

Attachment: CPD9 cNMR.pdf (523kB)
This file has been downloaded 392 times

kristofvagyok - 11-5-2013 at 16:13

Was there a proton scan from that? Or an MS? This looks like something impure with an oxime/amide/amidine group in it. Almost infine solutions could be given for this spectra.

Was the compound pure? Have anyone attempted to purify it? Those small peaks looks bad, and since they are also listed, it looks chaotic.

anoopai - 11-5-2013 at 19:53

Didnt took mass, This compound was too difficult to purify, but purified to a level we could

Attachment: CPD9 HNMR.CONC.pdf (554kB)
This file has been downloaded 386 times

anoopai - 12-5-2013 at 04:43

What about other spectra ?

BromicAcid - 12-5-2013 at 04:58

What was your deuterated solvent on this one? Even with a deuterated solvent you should see some hint of your solvent, especially in dilute conditions and your TMS peak is moderately large.

For your HNMR your peak at 5.746 must have been important since you set it to 1 for your integration, mind telling us what you think that proton belongs to?

anoopai - 12-5-2013 at 05:44

Solvent is CD3OD

[Edited on 12-5-2013 by anoopai]

anoopai - 15-5-2013 at 05:21

kindly someone giveme some clues

thank you

anoopai - 21-5-2013 at 20:06

I am attaching ESI-MS spectra, with UV

Attachment: ESI-MS.pdf (770kB)
This file has been downloaded 350 times

GreenD - 22-5-2013 at 12:40

So you just scraped something off the bottom of your lab bench and put it in an NMR tube?

How did you get this compound? Synthesize? Extract?

Without context I wouldn't even open an NMR file. It would be futile, especially if you have more than 10 protons.

anoopai - 22-5-2013 at 19:38

Got from extract

GreenD - 24-5-2013 at 11:10

Quote: Originally posted by anoopai  
Got from extract

extract of what... seriously, help us out
how did you extract it?

This is ridiculous if you think we can tell you what something is if you don't tell us where you got it from, how you got it, and what you were attempting to get.

anoopai - 24-5-2013 at 20:21

I got it from Tinospora leaf extract, i was just isolating the compound and want to study it, not any target,

[Edited on 25-5-2013 by anoopai]

anoopai - 29-5-2013 at 03:46

so ....