The answer key says the red hydrogen sees 3 peaks. How is that?
Protons in the NMR
Posted 12 December 2016 - 09:46 AM
Posted 12 December 2016 - 02:29 PM
The opposing CH2Cl site is too far away to really influence coupling, if that would confuse you otherwise. If it would be right next to it (1,3 dichloropropane instead of the current 1,4 dichlorobutane), it would cause a 5-fold splitting.
Posted 12 December 2016 - 04:31 PM
addendum: doublet from structure 1 is from t-butyl
No, the H's would not couple. n is 1 due to the t-butyl because the distance is 2 bonds.
Explain structure 3 to me, please.
Between the hydrogen atoms of the t-butyl group and the hydrogen in question there are four bonds, not two bonds. When there are four bonds, the coupling constant is usually small and may be undetectable.
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