What Is the Correct Name for This Alkane Structure?

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The correct name for the alkane structure in question is 3-ethyl-5-methyloctane, as the longest carbon chain consists of eight carbon atoms. The initial count of 11 carbons was incorrect because it did not account for the longest straight chain. The structure includes an ethyl group attached to the third carbon and a methyl group on the fifth carbon. There was some confusion regarding the proper punctuation in the name, but the consensus is that it should include hyphens. Understanding the longest chain and branching is crucial for accurate naming in organic chemistry.
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Homework Statement



2lswshs.jpg

Enter the name for the above alkane.

Homework Equations



How to count Carbons and Hydrogen's.

The Attempt at a Solution



My answer was "Undecane" because I counted 11 Carbons and 24 Hydrogens but it says I am wrong. Any Idea?
 
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FIND THE LONGEST STRAIGHT CHAIN OF CARBONS. After that,... adjust the name according to the branches.

Big hint: 11 is NOT the number of carbons in the longest chain.
 
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so the longest chain has 8 carbon atoms, with an ethyl group coming off the 3rd atom, and a methyl group coming off the 5th atom. SO...

3-ethyl 5-methyl octane ?
 
deteam said:
so the longest chain has 8 carbon atoms, with an ethyl group coming off the 3rd atom, and a methyl group coming off the 5th atom. SO...

3-ethyl 5-methyl octane ?

Good for the identification details. I'm no longer sure about the punctuation; maybe someone else will say. (Maybe a quick review in wikipedia?)
 
OK, I know you nearly had it perfectly.

3-ethyl-5-methyloctane
 
symbolipoint said:
OK, I know you nearly had it perfectly.

3-ethyl-5-methyloctane

hi...i just get a bit confused on when to use the brackets and commas in a name or not...
 
symbolipoint said:
Good for the identification details. I'm no longer sure about the punctuation; maybe someone else will say. (Maybe a quick review in wikipedia?)

thanks you . .
 

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