Nomenclature question!!!

[FROGGBUSTER]

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What is the IUPAC name of the molecule in my attachment?

The answer is 3-tert-butylheptane.

I know you can use common names in IUPAC, but this still doesn't make sense to me because I think the proper IUPAC name would be 3-Ethyl-2,2-dimethylheptane. You can include more substituents in the chain..

 

[molar3]

What is the IUPAC name of the molecule in my attachment?

The answer is 3-tert-butylheptane.

I know you can use common names in IUPAC, but this still doesn't make sense to me because I think the proper IUPAC name would be 3-Ethyl-2,2-dimethylheptane. You can include more substituents in the chain..

interesting.......at first i thought the answer was 3 tbutl heptane too but when i looked at it again to see your answer, i understand that too. and when watching chads vids, he said find the longest carbon chain (which would be 7 in either case) and then find the way to get the most substituents.........so i feel like youre right?! im confused now too.
whered u get this question/answer from?

 

[LetsGo2DSchool]

It should be 3-ethyl-2,2-dimethylheptane. I'm 99.9% sure.

The answer key must be wrong.

 

[FROGGBUSTER]

It's from ExamCrackers 1001 orgo questions.

There was actually no "3-Ethyl-2,2-dimethylheptane" answer choice provided, and the other 3 choices were clearly false.

Thanks though guys! Just a bad question I suppose.

 

[HannibalLecter]

It's from ExamCrackers 1001 orgo questions.

There was actually no "3-Ethyl-2,2-dimethylheptane" answer choice provided, and the other 3 choices were clearly false.

Thanks though guys! Just a bad question I suppose.

Wow I came here to defend examkrackers but I was proven wrong. You guys are right, the chain with the highest number of substituents wins. Proof as well as examples for you to work on:

http://www2.chemistry.msu.edu/faculty/reusch/VirtTxtJml/nomexmp1.htm#exp1

 

[Mr PS09]

yea ek looks wrong... im pretty sure that is the exact example chad uses too

 

[MAdental]

whats wrong with it? its perfectly fine. Tert-butyl is the same as t-butyl and it looks like its t-butyl. the answer is right folks.

 

[RING12]

what I have learned in school was we always we should get the smallest number possible with 3-tert-butyl we get 3 but with other way around we get 322. Maybe that is why we should name it that way!!!

 

[FROGGBUSTER]

whats wrong with it? its perfectly fine. Tert-butyl is the same as t-butyl and it looks like its t-butyl. the answer is right folks.

you want the chain with the greatest # of substituents.