Diene

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Mara Lockhart 3J
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Joined: Fri Sep 26, 2014 2:02 pm

Diene

Postby Mara Lockhart 3J » Mon Mar 09, 2015 6:45 pm

When naming the cycloalkenes, why do we put diene as oppose to just -ene? (We can see this on problem 1.21 in the Organic Chemistry Textbook).

martha-1I
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Re: Diene

Postby martha-1I » Mon Mar 09, 2015 7:31 pm

the Di- in front of the -ene states that there are two double bonds in the structure. Their locations should be stated when naming the molecule.

Chem_Mod
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Re: Diene

Postby Chem_Mod » Mon Mar 09, 2015 7:44 pm

Martha is correct. -ane, -ene, and -yne take the numerical prefixes just like for substituents.

Mara Lockhart 3J
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Joined: Fri Sep 26, 2014 2:02 pm

Re: Diene

Postby Mara Lockhart 3J » Mon Mar 09, 2015 8:01 pm

Oh. okay! Thank you, so if there was three double bonds, it would be trinene?

Neil DSilva 1L
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Re: Diene

Postby Neil DSilva 1L » Mon Mar 09, 2015 9:20 pm

Yes, we would use the same Greek prefixes used to label multiple substituents. So three double bonds would be indicated by "tri-en-".


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