Question

Determine the expected number of signals in the proton NMR spectrum for 2,2-dichlorobutane

Answer 1

2,2-dichlorobutane is expected to have three signals in the proton NMR spectrum due to three unique hydrogen environments.

Step-by-step explanation:

The expected number of signals in the proton NMR spectrum for 2,2-dichlorobutane can be determined by examining the molecule's structure and identifying the different environments the hydrogen atoms are in. For 2,2-dichlorobutane, there are three different types of hydrogen environments:

• Two CH3 groups at the end of the molecule (they are equivalent and will give one signal).
• One CH2 group next to the CH3 groups (it is unique and will give another signal).
• Another CH2 group next to the chlorine atoms (also unique and will give yet another signal).

Considering these unique environments, we expect to see three signals in the proton NMR spectrum of 2,2-dichlorobutane.