Choose the correct name according to IUPAC nomenclature.
Correct answer: B. 3-Ethyl-2-methyl pentane
- A. 2-Ethyl-3-methyl pentane
- B. 3-Ethyl-2-methyl pentane
- C. 3-Methyl cyclohexane
- D. 3-Ethyl-4-methyl pentane
Explanation
According to IUPAC nomenclature Number the longest chain, beginning with the end nearest a branch. When two or more different substituents are present, list them in alphabetical order. This name suggests that there is one ethyl group at the 3rd carbon and one methyl group at the 2nd carbon of the pentane chain. The placement of the substituents is consistent with the name, making this option A correct choice. While other options don't follow the IUPAC nomenclature according to the given figure.
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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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