A) 2,3-diethylhexane
B) 3-ethyL2-methylpentane
C) 3,4-dimethylpentane
D) 2-ethyl-2-methylpentane
Correct Answer: B
Solution :
3-ethyl-2-methyl pentane is a correct name according to IUPAC rules. \[\underset{3-ethyl-2-methyl\text{ }pentane}{\mathop{\overset{5}{\mathop{C{{H}_{3}}}}\,\overset{4}{\mathop{CH2}}\,\underset{\begin{smallmatrix} | \\ C{{H}_{2}}C{{H}_{3}} \end{smallmatrix}}{\overset{3}{\mathop{CH}}}\,\underset{\begin{smallmatrix} | \\ C{{H}_{3}} \end{smallmatrix}}{\overset{2}{\mathop{CH}}}\,\overset{1}{\mathop{C{{H}_{3}}}}\,}}\,\]
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