Question

The compound which has one isopropyl group is?

• A. $2,2,3,3-$Tetramethylpentane
• B. $2,2-$Dimethylpentane
• C. $2,2,3-$Trimethylpentane
• D. $2-$Methylpentane

Answer 1

The correct option is D

$2-$Methylpentane

The explanation for the correct option:

Option(D): $2-$Methylpentane

• The Isopropyl group is known as a portion of the molecular structure of the Propyl group having a three-carbon Alkyl substituent with the chemical formula$-\mathrm{C}{\mathrm{H}}_2\mathrm{C}{\mathrm{H}}_2\mathrm{C}{\mathrm{H}}_3$.
• We can look at the structure of $2-$Methylpentane, given as:

• This structure suggests that the given compound contains one Isopropyl group.

The explanation for the incorrect option:

Option(A): $2,2,3,3-$Tetramethylpentane

• The Structure of the compound $2,2,3,3-$Tetramethylpentane can be given as:
  

• The above structure represents that the given compound doesn’t contain any Isopropyl group.

Option(B): $2,2-$Dimethylpentane

• The Structure of the compound $2,2-$Dimethylpentane can be given as:

• The above-represented structure doesn’t contain any Isopropyl group.

Option(C): $2,2,3-$Trimethylpentane

• The Structure of the compound $2,2,3-$Trimethylpentane can be given as:
  
• This structure doesn’t also have any Isopropyl group.

Hence, the compound with one Isopropyl group is $2-$Methylpentane, option (D) is the correct answer.