Asked by fay

2 ethylpentane
My answer for this is a correct name and structure but my teacher said it is incorrect.. Why? Please explain.
Answered by fay
Answer pls
Answered by DrBob222
Draw it out--which I can't do on this forum. Then count the LONGEST chain. It will be a hexane so it will be named as a 3-methylhexane.
Answered by fay
I have tried drawing it. But its still correct..
Ch3-ch(c2h5)-ch2-ch2-ch3
I don't see anything wrong about this.
Answered by fay
Ohh. Now i get it!! Thank you dr. Bob!
Answered by DrBob222
Great. Glad to help. You must be careful about "bunching up" ethyl, propyl, butyl groups. When you do that you forget about counting the carbons in those bunched up groups to make the longest chain--so you end up getting smaller chains than you would do otherwise.
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