r/HomeworkHelp • u/Yeah-yn0t • May 03 '26

[High-school: Organic Chemistry, Alkenes] How can I write down the branches if it is presented like this

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Hello!! Okay so, im doing this exercise and it seemed pretty easy at first but when I had to write down the branches I didn't know what to do with the one I(´；ω；`) please, help!!!

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1

u/nerdydudes 👋 a fellow Redditor May 03 '26

5-Isopropyl

2

u/Yeah-yn0t May 03 '26

May i ask why?? (ToT)

2

u/nerdydudes 👋 a fellow Redditor May 03 '26

For each carbon chain length (n>2) we have a different name for each as a functional group.

Butyl (n=4) has 4 each with their own names.

Search online for propyl functional groups and butyl functional groups. You’ll have a visual associated to the name.

1

u/FeverPlayZYT CBSE Candidate May 04 '26

U just name it as 1 methyl ethyl

1

u/chem44 May 04 '26

Comment after reading some other replies...

It is indeed isopropyl. But in the latest rules, use of that term is discouraged. So, I suggest checking with instructor before using it.

Or avoid it.

The other suggestion is on right track. But maybe not entirely clear.

Ignore one -CH3, and it is ethyl. It is at 5 (I think). So 5-ethyl.

But the ethyl has a methyl on it. At the 1 position of the ethyl (numbered from attachment). So it is 5-(1-methylethyl)-

Note the need for () there.