Copyright

For each of the three possible isomers of acetyl anisole (ortho, meta, and para), predict the...

Question:

For each of the three possible isomers of acetyl anisole (ortho, meta, and para), predict the number of peaks that would be observed in the 1H NMR spectrum and the splitting pattern you would expect for each peak.

{eq}^1H {/eq}-NMR

{eq}^1H{/eq}-NMR is a tool to find different proton environments in a molecule. Different environments have electronically non-equivalent protons because they are adjacent to different groups. Each different environment will give a signal on a spectrum. This signal will be split into n+1 peaks, where n is the number of adjacent protons. The integration of these signals indicates the number of protons in that environment.

Answer and Explanation:

o-acetyl anisole

This isomer will have 6 different proton environments. Following the n+1 rule, the splitting of each environment is shown below

m-acetyl anisole

This isomer will have 6 different proton environments. Following the n+1 rule, the splitting of each environment is shown below

p-acetyl anisole

This isomer will have 4 different proton environments. Following the n+1 rule, the splitting of each environment is shown below. Proton 2 will split into doublets but will have an integration of 2. Similar with protons 3.


Learn more about this topic:

How to Read NMR Spectra of Organic Compounds
How to Read NMR Spectra of Organic Compounds

from Organic Chemistry: Help & Review

Chapter 2 / Lesson 2
17K

Related to this Question

Explore our homework questions and answers library