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Topic: question in nmr  (Read 3011 times)

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Offline HB

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question in nmr
« on: February 10, 2013, 01:38:21 PM »
how many signals appear for the methoxy protons in 3,4,5-trimethoxyphenyl group?
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Offline OC pro

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Re: question in nmr
« Reply #1 on: February 10, 2013, 04:23:29 PM »
Depends on your machine. With a 500 MHz upwards you should see 3 singulets. But I can imagine that you will only see 1 singlet.
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Offline orgopete

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Re: question in nmr
« Reply #2 on: February 10, 2013, 09:28:07 PM »
Two, the 3 and 5 should be identical due to symmetry.
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Re: question in nmr
« Reply #3 on: February 11, 2013, 01:47:47 PM »
Orgopete is right of course. My brain was blocked yesterday  ;D.  The signals should have a 2:1 ratio.
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