Naming alkanes

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JukaKim_1D
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Joined: Fri Sep 25, 2015 3:00 am

Naming alkanes

Postby JukaKim_1D » Mon Feb 29, 2016 1:23 pm

When you have dimethylethyl as a substituent and methyl as another substituent on a parent chain, octane, and the numbering can either be 4,5 or 5,4, would you put 4-(1,1-dimethylethyl)-5-methyl-octane or 4-methyl-5-(1,1-dimethylethyl)-octane? When considering the alphabetical order for the dimethylethyl, do you look at the "m" in methyl or "e" in ethyl?

chemgal4L
Posts: 19
Joined: Fri Sep 25, 2015 3:00 am

Re: Naming alkanes

Postby chemgal4L » Mon Feb 29, 2016 2:57 pm

I think it would be 4,5 giving th slowest number first and then you look at the "m" in dimethylethyl for alphabetical purposes.

Spencer Johnson 1C
Posts: 9
Joined: Fri Sep 25, 2015 3:00 am

Re: Naming alkanes

Postby Spencer Johnson 1C » Mon Feb 29, 2016 4:14 pm

The correct answer would be 4-methyl-5-(1,1-dimethylethyl)-octane because methyl comes before methylethyl alphabetically


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