Numbering the Double Bond

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Cole_Heramb_2E
Posts: 7
Joined: Wed Nov 18, 2015 3:00 am

Numbering the Double Bond

Postby Cole_Heramb_2E » Tue Mar 14, 2017 9:46 pm

Where does the number go in the name to signify the placement of the double bond? Is it at the beginning of the name or before the "ene"?
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Garrett_Reynolds_1D
Posts: 21
Joined: Fri Jul 15, 2016 3:00 am

Re: Numbering the Double Bond

Postby Garrett_Reynolds_1D » Tue Mar 14, 2017 10:43 pm

It goes at the very beginning of the name.
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Da_Rhee_1O
Posts: 20
Joined: Wed Sep 21, 2016 2:59 pm

Re: Numbering the Double Bond

Postby Da_Rhee_1O » Wed Mar 15, 2017 9:58 am

It can go both ways. 2 pentene and pent-2-ene both signify that the double bond is on the 2nd carbon of the parent chain. 2 pentene is a simpler way to say it.
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Paul Sedaros 1B
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Joined: Fri Sep 25, 2015 3:00 am

Re: Numbering the Double Bond

Postby Paul Sedaros 1B » Wed Mar 15, 2017 11:15 am

I believe the number for the double bond is usually placed at the beginning of the alkene name
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