MCQ
$IUPAC$ name of the ${(C{H_3})_2}CHCH{(C{H_3})_2}$ is
  • A
    $1, 1, 2, 3-$ tetramethylethane
  • B
    $1, 2-$ di-isopropylethane
  • $2, 3-$ dimethylbutane
  • D
    $2, 3, 3-$ trimethylbutane

Answer

Correct option: C.
$2, 3-$ dimethylbutane
c
$\begin{matrix}    C{{H}_{3}}-CH-HC-C{{H}_{3}}  \\    |\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,|  \\    C{{H}_{3}}\,\,\,\,\,\,\,C{{H}_{3}}  \\ \end{matrix}$

Methyl substituent is present at $2nd$ and $3rd$ carbon in parent chain so prefix would be $2,3$-dimethyl and the parent chain contains $4$ carbon therefore suffix would be butane.

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