[phoenixrising]

Is the answer

Since there's a signal between 3 and 4, an ester/ether/alcohol is present in the compound. and C4H8O2 tells me that there's 4 carbons (particularly a butyl chain), and 2 oxygens

[discodermolide]

The Methyl group of methyl acetate should be around 2ppm, the CH₂O around 4. So that spectrum does not correspond to your suggestion.
Is there another way you can arrange the groups in this molecule to give a compound which has that NMR?

[phoenixrising]

The Methyl group of methyl acetate should be around 2ppm, the CH₂O around 4. So that spectrum does not correspond to your suggestion.
Is there another way you can arrange the groups in this molecule to give a compound which has that NMR?

Wait what?

So you're essentially saying the numbers on the graph indicate the location of each functional group? o.O

[phoenixrising]

The Methyl group of methyl acetate should be around 2ppm, the CH₂O around 4. So that spectrum does not correspond to your suggestion.
Is there another way you can arrange the groups in this molecule to give a compound which has that NMR?

??

[discodermolide]

That's still not quite correct. It is the same compound you already suggested.
The 3H singlet at around 3.6ppm indicates a CH₃ group attached to what?

[phoenixrising]

That's still not quite correct. It is the same compound you already suggested.
The 3H singlet at around 3.6ppm indicates a CH₃ group attached to what?

An oxygen

[discodermolide]

Right, so you have an OMe group

[phoenixrising]

Right, so you have an OMe group

So the structure is ?

[discodermolide]

Right, methyl propionate.
Can you appreciate the differences?

[phoenixrising]

Right, methyl propionate.
Can you appreciate the differences?

yes indeed! thanks!!