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Author Topic: Relating a Hnmr to a possible structure  (Read 836 times)

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clarkstill

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Re: Relating a Hnmr to a possible structure
« Reply #15 on: November 16, 2017, 05:18:14 AM »

Pretty sure this isn't what you're looking for. The 1H spectrum should have 12 unique environments by my count (since the amine breaks the symmetry of the thiophene so the aryl groups are non-equivalent) and the 13C should have 22 peaks I think, which yours has nothing like. Whatever you've got seems to be much smaller or more symmetrical.
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Sach

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Re: Relating a Hnmr to a possible structure
« Reply #16 on: November 16, 2017, 06:16:23 AM »

I also thought that the amine would break the symmetry but I wasn't sure if it would really show on C-nmr. I have recently been studying C-nmr to be able to interpret it better (I studied it during graduation which is more than 2y ago now). Thank you all for your input, I appreciate it.
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Sach

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Re: Relating a Hnmr to a possible structure
« Reply #17 on: November 16, 2017, 06:35:11 AM »

I am actually thinking that this C-nmr indicates my molecule without the benzyl carbamate (amine group and protecting group removed).
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kriggy

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Re: Relating a Hnmr to a possible structure
« Reply #18 on: November 20, 2017, 08:41:09 PM »

yeah the sample conc. seems low. I suggest using more sample and maybe more scans as well.

btw if you want to be sure that you have the amine group, the easiest way is to use ninhydrine stain. Its cheap and most likely you have some lying randomly in cabinet

Sach

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Re: Relating a Hnmr to a possible structure
« Reply #19 on: November 21, 2017, 05:38:56 AM »

Ok thank you
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