3-ethyl-1,1-dimethyl-4-propylcyclohexane
how come you dont name the propyl group 1, ethyl group 2 and the dimethyl's 4?
thanks
how come you dont name the propyl group 1, ethyl group 2 and the dimethyl's 4?
thanks
nomenclature question
- Thread starter anonymuz
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You need the lowest combinations of substituants. Lets say you have the option of 1,2,4 or naming it in reverse 2,4,5.. 1,2,4 will always win because you have 1 which trumps 2 and etc.. I believe that's what your asking, correct?
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Because you need the lowest total number when numbering substituents.. let me explain
If you numbered 1 from the methyl groups to 4 w/ propyl.. you have 1 (CH3) + 1(CH3) + 3 (Eth) + 4 (Prop) = 9
If you numbered from 1 being propyl to 4 being methyls you'd have 1 (prop) + 2 (eth) + 4 (CH3) + 4 (CH3) = 11
9 is less than 11, so that numbering is preferred
If you numbered 1 from the methyl groups to 4 w/ propyl.. you have 1 (CH3) + 1(CH3) + 3 (Eth) + 4 (Prop) = 9
If you numbered from 1 being propyl to 4 being methyls you'd have 1 (prop) + 2 (eth) + 4 (CH3) + 4 (CH3) = 11
9 is less than 11, so that numbering is preferred
