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B What is the IUPAC name for the compound shown here? A) 3-ethyl-4-methylpentane B) 3-ethyl-2-methylpentane C) ethylmethylpentane D) 3-ethyl-2-methylhexane E) 2-ethyl-3-methylpentane

B What is the IUPAC name for the compound shown here? A) 3-ethyl-4-methylpentane B) 3-ethyl-2-methylpentane C) ethylmethylpentane D) 3-ethyl-2-methylhexane E) 2-ethyl-3-methylpentane

Chemistry
Chemistry
10th Edition
ISBN:9781305957404
Author:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste
Publisher:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste
Chapter1: Chemical Foundations
Section: Chapter Questions
Problem 1RQ: Define and explain the differences between the following terms. a. law and theory b. theory and...
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**Question 3 of 12** **What is the IUPAC name for the compound shown here?** *Diagram:* The diagram displays a chemical structure, which is a branched alkane. It consists of a four-carbon chain (butane) with a two-carbon side chain (ethyl) attached to the third carbon of the main chain. *Answer Choices:* A) 3-ethyl-4-methylpentane B) 3-ethyl-2-methylpentane C) ethylmethylpentane D) 3-ethyl-2-methylhexane E) 2-ethyl-3-methylpentane *Explanation of the Diagram:* - The main carbon chain has four carbon atoms (butane). - There is one ethyl group branching off the main chain. To identify the correct IUPAC name, you must determine the longest continuous carbon chain and correctly number the carbons to give the substituents the lowest possible numbers.
Transcribed Image Text:**Question 3 of 12** **What is the IUPAC name for the compound shown here?** *Diagram:* The diagram displays a chemical structure, which is a branched alkane. It consists of a four-carbon chain (butane) with a two-carbon side chain (ethyl) attached to the third carbon of the main chain. *Answer Choices:* A) 3-ethyl-4-methylpentane B) 3-ethyl-2-methylpentane C) ethylmethylpentane D) 3-ethyl-2-methylhexane E) 2-ethyl-3-methylpentane *Explanation of the Diagram:* - The main carbon chain has four carbon atoms (butane). - There is one ethyl group branching off the main chain. To identify the correct IUPAC name, you must determine the longest continuous carbon chain and correctly number the carbons to give the substituents the lowest possible numbers.
Expert Solution
Step 1

In the I.U.P.A.C system of nomenclature, at first chosen the longest chain-----

C-C-C-C-C

Here the longest chain contains 5 carbon atoms, so the compound is pentane.

In this compound two substituents present------

One at position 2 which is methyl (-CH3)

Other at position 3 which is ethyl (-C2H5)

 

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