[gsel]

What will be the IUPAC name for this molecule (CH3)2CHC(CH3)2CH2CH2CH3?

[discodermolide]

What is your suggestion for a name?

[gsel]

It would have to be something like a nonane, but the parentheses confuses me. I dont see if they should be interpered as branches, or what?

[discodermolide]

The brackets are a way of saying that there are 2 methyl groups attached to the CH group. (CH₃)₂CH-
To find the parent you need to find the longest carbon chain.

[Borek]

Depends.

CH₃CH₂CH₂CH₃

would mean



and can be also written as

CH₃(CH₂)₂CH₃.

But

(CH₃)₂CHCH₂CH₃

means there are two CH₃- groups attached to the first carbon (see it has only one hydrogen attached and is listed as CH?) so it is



And yes, when the parentheses show inside of the molecule, they can mean branches - just count hydrogens and valencies to be sure. -(CH₂)_n- always means a chain, but (CH₃) must be a branch.

(Edit: disco was faster, but I guess my SMILES are still worth posting ))

[gsel]

Aha! Then in my case I would go for 2,3,3-trimethylhexane. How about that?

[discodermolide]

Sorry, nope. What is the longest carbon chain?

[gsel]

I thought of it as two methyl groups attached to 1st and 2nd carbon. If I start counting from the first methylgroup I will end up with six carbons in a row with three methyl groups branched of. If I would not start counting from the methyl group I get 1,1,2,2-tetramethylpentane, but i dont see why i cannot count with the methyl to get the longest chain possible?

[discodermolide]

2,3,3-trimethylheptane

[SadBloke]

I'm a little confused...I only count 9 carbons in the original post but I count 10 in Disco's answer...

I get 2,3,3-trimethylhexane, as well.

 

[discodermolide]

I must apologise, I mis-read the structure:


2,3,3-trimethylhexane