[mjoa123]

No it's not them. I can see you reasoning.
Go back to
http://en.wikipedia.org/wiki/Proton_NMR
and look at the table.
Think about the triplet at 4.1 ppm. What does that mean?

NO2?

[discodermolide]

Where did NO₂ come from? The table gives the shifts of protons attached to such groups.
PROTONS.

[mjoa123]

Where did NO₂ come from? The table gives the shifts of protons attached to such groups.
PROTONS.

Eh.. I have no clue if I'm even looking at the same table. At 4.1 on CH3 it says NO2 to the right of it.

[discodermolide]

Look at OCOR also says 4.1. also look at COR shifts in the table.
I can't remember the shifts exactly in your NMR, again what does the IR tell you?
remember we have
CH3-CH2-Unknown-Unknown-Unknown-CH3
Just 3 unknown groups/atoms to go

[mjoa123]

Look at OCOR also says 4.1. also look at COR shifts in the table.
I can't remember the shifts exactly in your NMR, again what does the IR tell you?
remember we have
CH3-CH2-Unknown-Unknown-Unknown-CH3
Just 3 unknown groups/atoms to go

Is it a methyl or ethyl?

[discodermolide]

Is what a methyl or ethyl?

[mjoa123]

Is what a methyl or ethyl?

My compound. Sorry I'm really dumb when it comes to this stuff, I can't believe you've stuck around.

I mean does the name start with methyl or ethyl or propyl? I'm thinking it's ethyl ethanoate?

[discodermolide]

Neither.
Consider the signal at 2.05, the singlet. Look at the table, what does it correspond to? It looks like COCH₃ to me.
So we have CH3-CH2-Unknown-Unknown-C=O-CH3, that is an acetate at one end.

[mjoa123]

Neither.
Consider the signal at 2.05, the singlet. Look at the table, what does it correspond to? It looks like COCH₃ to me.
So we have CH3-CH2-Unknown-Unknown-C=O-CH3, that is an acetate at one end.

Are you sure the oxygen is attached to both C and CH3?

[discodermolide]

Sorry my fault, Look at the picture, THe X represent those groups you have not found yet.

[mjoa123]

Well I'm assuming the two that are left are both CH2. Still have no idea what it's called though :/

[discodermolide]

No they are not both CH₂, only one is. Back to the NMR, the signal at 4.1 is a triplet, meaning it is attached to a carbon bearing 2 hydrogens. The 4.1 signal for this group also means something else according to the table it could be attached to oxygen. What do you think?

[mjoa123]

No they are not both CH₂, only one is. Back to the NMR, the signal at 4.1 is a triplet, meaning it is attached to a carbon bearing 2 hydrogens. The 4.1 signal for this group also means something else according to the table it could be attached to oxygen. What do you think?

So one of them is CH2 and the other is CO?

[discodermolide]

YES, so what we have is propyl acetate.
Attached is a calculated NMR of the compound. Compare it to yours.

One thing, please explain the 5 lines at around 1.75 to me.

[mjoa123]

Come on we are nearly there.

Is the other one CO or something else?