Nomenclature of Alkenes with Functional Groups

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Shivam Patel
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Joined: Fri Sep 25, 2015 3:00 am

Nomenclature of Alkenes with Functional Groups

Postby Shivam Patel » Sat Mar 12, 2016 4:03 pm

If there was a hydrocarbon- let's say for example, with eight chains of carbon, and there was a functional group (for example a ketone at the 3rd carbon), and there is a double bond starting at the 2nd carbon, how would one go about naming this with IUPAC naming considering the numbers? I believe you should have "3-one" at the end, but I'm not sure where to go from there.

jbcarton
Posts: 11
Joined: Fri Sep 25, 2015 3:00 am

Re: Nomenclature of Alkenes with Functional Groups

Postby jbcarton » Sat Mar 12, 2016 6:43 pm

You can't have a double bond starting at the second C (which means it's between 2 and 3) and have a ketone on the third because there would be 5 bonds coming off of the 3rd carbon (2 from the second carbon, 2 to the oxygen atom for the ketone, and 1 to the fourth C to keep the chain going). However, if the double bond started on, let's say, the 5th carbon atom, it would be...

Oct-5-en-3-one


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