Respuesta :
Answer:
carbons that are in different environments
Explanation:
When molecules are asymmetric every carbon will have its own peak since they are all different and will show up with a different ppm shift. Β If the molecule has symmetry the carbons that are symmetrical (in the same environment) will have the same ppm shift and will therefore show up as one peak. Β
An example of a molecule with symmetry is isopropanol which has 3 carbons but only two carbon peaks since the two methyl groups are symmetrical.
An example of a molecule with no symmetry is 3-Nitroaniline where the groups coming off of the benzene ring makes each of the 6 carbons be in different environments and there for all 6 carbons will have different ppm shifts. Β The result is a carbon NMR that has 6 peaks.
I hope this helps. Β Let me know if anything is unclear.
