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Nomenclature of Unsaturated Hydrocarbons

The IUPAC nam...

Question

The IUPAC name of the compound is :

A

7-Ethyl-2,4,5,6-tetramethyldeca-1,8-diene

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B

7-Ethyl-2,4,5,6-tetramethyldeca-1,7-diene

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C

4-Ethyl-5,6,7,9-tetramethyldeca-2,9-diene

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D

(a) and (c) above.

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Solution

The correct option is A 7-Ethyl-2,4,5,6-tetramethyldeca-1,8-diene
The correct numbering in the present case is one that gives lowest possible number to double bond,thus correct numbering to longest chain is given by :7-Ethyl-2,4,5,6-tetramethyldeca-1,8-diene

Hence, correct IUPAC name is 7-Ethyl-2,4,5,6-tetramethyldeca-1,8-diene

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Nomenclature of Unsaturated Hydrocarbons

Standard XII Chemistry

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