Asked in NUMS 2016 2016

The IUPAC name of the following compound is:

Correct answer: A. 1-Ethyl-2, 4-dimethlycyclohexane

  • A. 1-Ethyl-2, 4-dimethlycyclohexane
  • B. 2-Ethyl-1,4-dimethylcyclohexene
  • C. 2-Ethyl-1, 1-dimethylcyclohexane
  • D. 4-Ethyl-1, 2-dimethylcyclohexane

Explanation

The IUPAC name of the compound is 1-ethyl-2,4-dimethylcyclohexane. The parent compound is cyclohexane. The carbon to which ethyl is attached is considered carbon 1 according to alphabetical order. The two methyl groups are on carbon 2 and 4 respectively.

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About Alkanes

Alkanes are saturated hydrocarbons containing only carbon-carbon and carbon-hydrogen single bonds, with the general formula CnH2n+2 for open chains. Their structure, isomerism, IUPAC nomenclature, physical properties, combustion, free-radical halogenation and conformations are covered, including the difference between substitution in alkanes and addition in unsaturated hydrocarbons.

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