Asked Dec 26, 2019

Each of the following IUPAC names is incorrect. Explain why it is incorrect and give the correct IUPAC name.
a. 2,2-dimethyl-4-ethylheptane
b. 5-ethyl-2-methylhexane
c. 2-methyl-2-isopropylheptane
d. 1,5-dimethylcyclohexane
e. 1-ethyl-2,6-dimethylcycloheptane
f. 5,5,6-trimethyloctane
g. 3-butyl-2,2-dimethylhexane


Expert Answer

Step 1

Hi there, As there are multiple subparts, we are answering first 3 subparts. if you need further subparts to be answered please repost the question.

Step 2



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Given systematic name of the molecule is, 2,2-dimethyl-4-ethylheptane. Heptane is the parent chain, two methyl groups were attached to the second carbon atom of parent chain and an ethyl group was attached to the fourth carbon atom in the parent chain respectively. According to the rules of IUPAC, the given name is incorrect; if more than two branches attached to the parent chain, then we should name the compound with respect to the alphabetical order. Thus, the correct name of the compound is 4-ethyl-2,2-dimethylheptane

Step 3



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Given name of the molecule is 5-ethyl-2-methylhexane. The structure of this molecule can be drawn as follows, Here, the parent chain has seven carbon atoms; two methyl groups were attached to the second and fifth carbon atom in the chain. Thus, according to the IUPAC rules, the given incorrect name of the molecule can be corrected as 2,5-dimethylheptane.


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