Question

Can you give me the structure for 2,3,5-trimethylhepta-2,4,6-triene?

Answer 1

The base part of the name "-hepta-" tells you that the chain has seven carbon atoms.

Explanation:

(from opsin.ch.cam.ac.uk)

The "-2,4,6-triene" ending tells you that there are three double bonds, and they are at `"C-2"`, `"C-4"`, and `"C-6"`.

(from opsin.ch.cam.ac.uk)

The "2,3,5-trimethyl-" prefix tells you that there are three methyl groups, and they are on `"C-2"`, `"C-3"`, and `"C-5"`.

(from opsin.ch.cam.ac.uk)

NOTE: You must number from the end closest to a double bond. The correct IUPAC name of this compound is 3,5,6-trimethylhepta-1,3,5-triene.