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VCE Stuff => VCE Science => VCE Mathematics/Science/Technology => VCE Subjects + Help => VCE Chemistry => Topic started by: Over9000 on March 25, 2009, 10:52:19 pm

Title: Quick question about organic chem
Post by: Over9000 on March 25, 2009, 10:52:19 pm

just a quick Q u know when u have functional groups and a double bond
 and u gotta find the longest Carbon chain
 and theres a functional group on the very left but a double bond on the very right
 its the functiona group takes precendant over the double bond yeah?

Title: Re: Quick question about organic chem
Post by: pHysiX on March 26, 2009, 08:31:50 pm

hmmm is this possible? i thought wen there are double bonds between Carbons, then there will be some sort of addition reaction...well that's my thought *thinks hard*

Title: Re: Quick question about organic chem
Post by: Collin Li on March 26, 2009, 08:36:55 pm

Actually, I Google'd this because I wasn't 100% sure.

The bottom of this page conflicts with itself:
http://elchem.kaist.ac.kr/jhkwak/OkanaganPdb97/nomenclature/ane-610.htm

Quote

Example 6 illustrates that the functional group named as a prefix takes precedence in the numbering system and is given the lowest possible number.

But that example puts "bromo" as number 12.

Title: Re: Quick question about organic chem
Post by: Over9000 on March 26, 2009, 08:37:24 pm

Thanks coblin

Title: Re: Quick question about organic chem
Post by: pHysiX on March 27, 2009, 07:56:12 pm

hmmm, from that same site:

http://elchem.kaist.ac.kr/jhkwak/OkanaganPdb97/nomenclature/ane-720.htm

look at pent-3-yn-1-ol. triple bond on the left, n functional group at end. and refer to the example above it for pent-4-en-1-ol. i think that's it =]