1.25

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Angelica Nava-1E
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Joined: Wed Sep 21, 2016 2:56 pm

1.25

Postby Angelica Nava-1E » Tue Mar 07, 2017 1:25 pm

For the name of the alkene I got 1,4 Dimethyl 2 butene but the answer is 3,4 dimethyl 3 heptene. Why is that? I thought that for the double bond it gets priority so it is 2 and the two methyl groups are on the 1st and 4th carbon. Also I drew out the structure and got 4 carbons on the longest chain while the CCH2H3 was on the 2nd carbon and CH2CH2CH3 was on the 3rd carbon. Where did I go wrong?

Ashley_Thomas_3C
Posts: 20
Joined: Wed Sep 21, 2016 2:56 pm

Re: 1.25

Postby Ashley_Thomas_3C » Tue Mar 07, 2017 2:50 pm

I think where you went wrong on this question is not taking into consideration the top right carbon group as part of the long chain when numbering.
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