Which of the following rules are violated in naming $H_{3} C - C (C H_{3})_{2} - C H_{2} - C H (C_{2} H_{5}) - C H_{3}$ as 2-ethyl-4,4-dimethyl pentene?

Rule for primary suffix

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Longest chain rule

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Least sum rule

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Rule for secondary suffix

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Solution

The correct options are
B Longest chain rule
C Least sum rule
The correct name of given compound should be 2,2,4-trimethylhexane. Here longest chain contains 6 carbon atoms. Therefore by naming it as 2-ethyl-4,4-dimethylpentane, the longest chain rule and the least sum rule are violated.

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