Question

Is this name for the organic compound on the picture and the numbering is correct?

i think the correct name is 6-methyloct-3-en-5-yne not 2-methyloct-5-en-3-yne

Answer 1

The correct name is 7-methyloct-3-en-5-yne.

Explanation:

You got the right direction but the wrong number.

Higher-priority groups determine the numbering. Other groups take the numbers assigned to their position in the chain.

Alkenes and alkynes have equal priority.

They have higher priority than alkyl groups, which have none.

When they occur in the same molecule, whichever is closer to the end of the chain gets the lower number.

However, if you get the same set of numbers from either direction (for example 3,5), the double bond (alkene) gets the lower number.

You follow the blue numbers, not the red ones.

The correct name is 7-methyloct-3-en-5-yne.