The question asks to name the molecule given. It is a cyclohexene, so it is a hexagon with one double bond, and then it has 4 methyl groups attached.
The answer given is 1,5,5,6-tetramethylcyclohexene. Why are the methyls numbered 1,5,5,6 instead of 2,3,4,4? In both cases the double bond is on carbons 1 and 2, but the second set of numbering is lower. Thanks so much!
Final 2013 Q6A
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Cindy Chen_2I
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Re: Final 2013 Q6A
Because we want the lowest single number possible, not the lowest sum. That's why we want the 1 in 1556 as opposed to the 2 in 2344.
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