A) 2, 3-diethylhexane
B) 3-ethyl-2-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. \[\underset{3-\text{ethyl}-2-\text{methyl}\,\text{pentane}}{\mathop{\overset{5}{\mathop{C}}\,{{H}_{3}}-\overset{4}{\mathop{C}}\,{{H}_{2}}-\,\,\,\underset{C{{H}_{2}}C{{H}_{3}}}{\mathop{\underset{|}{\overset{3}{\mathop{CH}}}\,}}\,-\underset{C{{H}_{3}}}{\mathop{\underset{|}{\overset{2}{\mathop{CH}}}\,}}\,-\overset{1}{\mathop{C}}\,{{H}_{3}}}}\,\]
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