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Topic: What is my unknown compound?  (Read 24855 times)

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Offline mjoa123

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Re: What is my unknown compound?
« Reply #45 on: December 07, 2012, 01:37:21 AM »
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?

Offline discodermolide

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Re: What is my unknown compound?
« Reply #46 on: December 07, 2012, 01:40:10 AM »
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.
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Offline mjoa123

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Re: What is my unknown compound?
« Reply #47 on: December 07, 2012, 01:46:58 AM »
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.

Offline discodermolide

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Re: What is my unknown compound?
« Reply #48 on: December 07, 2012, 01:51:30 AM »
Thank you.
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Offline orgopete

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Re: What is my unknown compound?
« Reply #49 on: December 07, 2012, 02:48:38 AM »
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?
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