Question

The IUPAC name of the compound is :

• A. 7-Ethyl-2,4,5,6-tetramethyldeca-1,8-diene
• B. 7-Ethyl-2,4,5,6-tetramethyldeca-1,7-diene
• C. 4-Ethyl-5,6,7,9-tetramethyldeca-2,9-diene
• D. (a) and (c) above.

Answer 1

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