What Is the Correct Name for This Alkane Structure?

[deteam]

Homework Statement

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?

 

[symbolipoint]

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.

 

[deteam]

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 ?

 

[symbolipoint]

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?)

 

[symbolipoint]

OK, I know you nearly had it perfectly.

3-ethyl-5-methyloctane

 

[GrandMaster87]

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...

 

[deteam]

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 . .