Sci im a farce of an undergrad research volunteer, i need help

What's an NMR? What does it show and what do you do with it? Concentrations of something in some sample?

>>8020623
It tells you about the individual environment of protons (Hs) in a molecule

>>8020572
Just remember, electron-withdrawing groups shift the peaks upfield

>>8020782
ok but is it possible to obtain an accurate representation of the molecule from the H NMR itself?

>>8020875
Yeah man, but you gotta pay close attention to the peaks, cause sometimes it can be a bit tricky to tell what atom the proton is bonding with

>>8020879
alright hold on im making a table gimme a sec man

>>8020904
>>8020879
From here i shoukd just start assembling the chain right

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>>8020904
Forgot pic

>>8020924
I think so, do you have IR or UV spectra as well?

>>8020928
Ye i have the IR its an ester, alkenes and alkanes

>>8020994
Yeah so that shouldn't be too hard then, get going nerd

>>8020999
Fuck man. Im gonna try real hard. Stay tuned

>>8021005
Alright i need help. Where would thw double bonds go? I know there has to be a number of,double bonds because,the sample was an oil. Does the number of Hs look right?

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>>8021055
Forgot pic lel>>8021055

watching some vids. bump

>>8020572
what other solvents were used in your reaction?

>>8021161
wait why

>>8021166
i mean if you have some solvent left over that will show up in your spectrum, so like lets say you have some hexanes still floating around... hexanes shows up at 0.89 and 1.21 ppm in CDCl3 so which is where some of your peaks are so that could throw off your integration

>>8021182
its supposed to be a pure sample of a fatty acid methyl ester from a colleague of my professor

>>8021189
shouldn't they have given you a name for it?

>>8021227
generic animal fat biodiesel

>>8020572
something seems off on your integration, that peak at 5.318 should integrate to 2 if you normalized that peak at 3.639 to 3, unless you just changed the label and it didn't actually recalculate the value for the rest of your peaks

>>8021241
i didnt recalculate the values

>>8021245
That's where you fucked up then, all your integrations are incorrect

>>8021245
Also I'm pretty sure there's just a single alkene in a ~24 carbon chain with it occurring around the 4th or 5th carbon from the carbonyl carbon

>>8021241
>integration is off
I pointed this out the last time OP posted this spectrum.

>>8021361
Op here

Whelp, im going into the lab tomorrow,to get a new NMR. Thanks guys