[Byrne]

Alright, say I have a benzene ring with a methyl group, an ethyl group, and an iodo group... which group takes presedence?  I know if the iodo group was not present, you would go according to alphabetical order, correct?  So your one carbon would be the ethyl group if the iodo group was not present.  

Does the iodo group hold presedence over the alkyl groups when numbering the carbons?

Is there an online table/chart that has IUPAC rules with regards to the order of importance when it comes to numbering carbon atoms in an organic molecule?  Thanks

[Yggdrasil]

http://en.wikipedia.org/wiki/IUPAC_nomenclature_of_organic_chemistry#Order_of_precedence_of_groups

[Byrne]

Thanks...

Another question, how would you name an amine that has a double bond?

Say we have a 5 carbon chain with an amine group on the second carbon and a double bond between the second and third carbon.

Now, a group with higher precedence receives the suffix, and the amine group is higher than the alkene group.

How would you name it then?

2-pentenyl-2-amine?

I think you could name it...

2-amino-2-pentene, but this would not agree with IUPAC (I think)

So, how should this compound be named?

[plu]

An nitrogen double-bonded to a carbon is referred to as an imine group.  A nitrogen single-bonded to a carbon which is double-bonded to another carbon is referred to as an enamine group.