Question

The structure of the compound having molecular formula $C_9H_{12}$ showing NMR peaks at δ 7.1, 2.2, 1.5 and 0.9 ppm is:

• A.

  

• B.

  

• C.

  

• D.

  

Hint:

Use NMR data to identify the number and type of hydrogen environments in a compound. Peaks at higher ppm values are usually associated with aromatic hydrogens.

Answer 1

The Correct Option is B

The NMR peaks correspond to different hydrogen environments. The peak at δ 7.1 is indicative of aromatic hydrogens, while those at lower chemical shifts correspond to methyl or methylene hydrogens.