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Postby 304657111 » Sun Mar 13, 2016 2:10 pm

Just for clarification, the numbering of substituents is determined by the alphabetical order and the first-named group gets the lowest number if two could potentially have the same number.

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Re: Naming

Postby Chem_Mod » Sun Mar 13, 2016 5:24 pm

Exactly! So say the two substituents are on carbon 2 and carbon 4 no matter whether you count the carbons from the left or right, then the lower number goes to the substituent that comes first alphabetically.

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