Write the condensed structural formula. Give its IUPAC name.

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Solution

The 5-ethyl is for the ethyl group attached at $C - 5$ , $3, 6$ -dimethyl is for the two methyl groups attached at $C - 3$ and $C - 6$ and nonane is for the long chain of $49$ carbon atoms.
Hence the IUPAC name for the given compound is 5-ethyl-3,6-dimethylnonane.

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Write the condensed structural formula. Give its IUPAC name.

The 5-ethyl is for the ethyl group attached at C−5, 3,6-dimethyl is for the two methyl groups attached at C−3 and C−6 and nonane is for the long chain of 49 carbon atoms.Hence the IUPAC name for the given compound is 5-ethyl-3,6-dimethylnonane.

The 5-ethyl is for the ethyl group attached at $C - 5$ , $3, 6$ -dimethyl is for the two methyl groups attached at $C - 3$ and $C - 6$ and nonane is for the long chain of $49$ carbon atoms.
Hence the IUPAC name for the given compound is 5-ethyl-3,6-dimethylnonane.