Question
Which of the following compounds is isomeric with 2, 2, 4, 4-tetramethylhexane?
A.
3-ethyl-2, 2-dimethylpentane
B.
4-isopropylheptane
C.
4-ethyl-3methyl-4-$$n$$-propyloctane
D.
4, 4-diethyl-3-methylheptane
Answer :
4-isopropylheptane
Solution :
\[\begin{align}
& \underset{\text{2, 2, 4, 4-tetramethylhexane}}{\mathop{{{H}_{3}}C\underset{\begin{smallmatrix}
| \\
\,\,\,\,C{{H}_{3}}
\end{smallmatrix}}{\overset{\begin{smallmatrix}
\,\,\,\,\,C{{H}_{3}} \\
|
\end{smallmatrix}}{\mathop{-C-}}}\,{{H}_{2}}C\underset{\begin{smallmatrix}
| \\
\,\,\,\,C{{H}_{3}}
\end{smallmatrix}}{\overset{\begin{smallmatrix}
\,\,\,\,\,C{{H}_{3}} \\
|
\end{smallmatrix}}{\mathop{-C-}}}\,{{H}_{2}}C-C{{H}_{3}}}}\, \\
& \text{is isomeric with 4-isopropylheptane} \\
\end{align}\]