Identifying nonequivalent protons practice [How to determine the number of signals in HNMR spectra]
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- Опубліковано 2 січ 2021
- Hello Students, Your Tutor Jake here to help you learn organic chemistry!
How many types of nonequivalent protons are present in each of thefollowing molecules?
a. 2,2-dimethylcyclohexane
b. 1-methoxypropane
c. naphthalene
d. styrene
e. ethyl acrylate
Here we discuss and practice how to identify unique hydrogen signals and how to determine how many signals to expect in your HNMR spectra.
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loved the naphthalene example; great video
Thanks ;) that was helpful ❤️
Well done
Thank you!!
Can you tell me the book having these problems?
Thank you
Well explained ❤️ #hassan4gpat
وصلت لعمق اليوتيوب من ورا الادفانس 🤖
I did not understand why naphthalene has 2 non-equivalent protons. Shouldn't it be 1?
because of para substitution?
If you think about equivalent protons, they need to be in the exact same chemical environment. In the case of naphthalene there are 2, there is one closer to the central connecting bond and one that is further away on the outside of the ring. You can even look at the carbons alpha (directly connected to) the CH bond. you'll notice if you look to either side there is one set that has only CH as neighbors and one that has a CH and one Carbon only connected to other carbons. I hope this helps!
the magnetic field is different between the two aromatoc rings (less electroneegative) so the two highlighted hydrogens are different due to their proximity to the center. + 4 way symmmetry so only two magnetically different
You failed to answer the question...but great explanation...
How? The number of nonequivalent protons is the number of different signals.