Chemical Forums

Chemistry Forums for Students => High School Chemistry Forum => Topic started by: kekie on April 19, 2014, 03:08:30 PM

Title: Naming hydrocarbons.
Post by: kekie on April 19, 2014, 03:08:30 PM

I know how to name Alkanes, Alkenes, and Alkynes, but how do you name something that has both double and triple bonds?

Title: Re: Naming hydrocarbons.
Post by: Hunter2 on April 20, 2014, 09:49:55 AM

It goes in the same way. A double bond get a lower number as a triplebond.

Title: Re: Naming hydrocarbons.
Post by: kekie on April 20, 2014, 04:08:13 PM

Sorry? I  don't quite get your meaning.

Title: Re: Naming hydrocarbons.
Post by: Hunter2 on April 21, 2014, 07:26:46 AM

How do you name an alkene and and an alkyne?
Give an example.

Title: Re: Naming hydrocarbons.
Post by: kekie on April 21, 2014, 12:32:41 PM

Something like hex-2,3-ene or 2,3hexene.

Why do you ask?

Title: Re: Naming hydrocarbons.
Post by: Hunter2 on April 21, 2014, 02:42:05 PM

No it is called Hexa-2,3-diene.

I asked why you dont know how to name it correctly.

Title: Re: Naming hydrocarbons.
Post by: kekie on April 21, 2014, 03:26:10 PM

Oh! so you do use di- in this context. I was unsure about that. Thanks! Still seems a bit redundant, though.
And why 'hexa' not 'hex'? Is it just easier to say?

I'm not sure how to respond to your question - I don't know how to name it correctly because I haven't learned yet - That's why I'm asking.

Title: Re: Naming hydrocarbons.
Post by: Hunter2 on April 22, 2014, 05:55:55 AM

Then I would suggest to read the IUPAC laws.

http://www.chem.ucalgary.ca/courses/351/ION-v02/alkynes/alkynes-02.html