A) 2-ethylbutene
B) 2-ethylbut-2-ene
C) 3-methylpent-2-ene
D) 3-methylpent-3-ene
E) 3-ethylbut-2-ene
Correct Answer: C
Solution :
The IUPAC name of the given compound is, \[C{{H}_{3}}CH=\underset{\begin{smallmatrix} | \\ {{C}_{2}}{{H}_{5}} \end{smallmatrix}}{\mathop{C}}\,C{{H}_{3}}\] Or \[\overset{1}{\mathop{C{{H}_{3}}}}\,-\overset{2}{\mathop{CH}}\,=\underset{\begin{align} & | \\ & ^{4}C{{H}_{2}} \\ & | \\ & ^{5}C{{H}_{3}} \\ \end{align}}{\overset{3}{\mathop{C}}}\,-C{{H}_{3}}\] So, the name is - 3-methyl pent-2-ene.
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