Question

сн-ҫнсH сH- о-сH, Cн, 3. Select the correct IUPAC name of

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Answer #1

The correct IUPAC name is : 1-methoxy-3-methylbutane

Explanation

The longest carbon chain for this molecule is 4 carbon atoms long. The substituent groups are methoxy (-OCH3) and methyl (-CH3)

According to IUPAC naming rules, ether group is given more preference than alkyl group. Hence the numbering of carbon chain starts from that end which gives methoxy group the lowest number (which indicates highest priority)

The numbering of 4 carbon chain starts from right end going left.

According to this numbering, methoxy group is attached to first carbon and methyl group is attached to third carbon in the longest chain.

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