[nokia8650]

How exactly does the numbering on organic compunds work when more than one groups are present?

For example, would the correct name be 4,5-dimethylhex-1-ene or 1,2-dimethylhex-5-ene?  Similarly, 4,4-dimethylpent-2-ene or 2,2-dimethylpent-3-ene?

Thanks.

[azmanam]

http://www.cem.msu.edu/~reusch/VirtTxtJml/nomen1.htm#start

[nokia8650]

Thanks alot, so to answer my own questions, 4,4-dimethylpent-2-ene and 4,5-dimethylhex-1-ene ?

Thank you again.

[nj_bartel]

yes