[mjoa123]

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.

There are 6 lines there, right?

[discodermolide]

Yes in your spectrum, one of them looks like water (the very left broad peak).
There are actually 5 lines.
It is the middle CH₂ with 4 neighbouring hydrogens, n+1 gives 5 lines.

[mjoa123]

Yes in your spectrum, one of them looks like water (the very left broad peak).
There are actually 5 lines.
It is the middle CH₂ with 4 neighbouring hydrogens, n+1 gives 5 lines.

My professor was wrong then. Further proving his helpfulness. Thanks so much mate, sent you a PM also. Really appreciate your time, you're a very nice person.

[discodermolide]

Thank you.

[orgopete]

Hmmm.. I think it's methyl butanoate? It also matches my boiling point. Is it methyl butanoate or methyl butyrate?

While methyl butanoate has a CH3 singlet and two CH2 groups, the lowest peak in the spectrum would be the methyl singlet as it is attached to an oxygen atom. Isn't it a CH2 attached to an oxygen?