What is a secondary alkene?

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Mad Man
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BlueChicken
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Mad Man
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Can anyone help?
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wowee10
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basically a secondary alkene is an alkene where the double bond between carbon atoms has two alkyl group on the carbon attached
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Mad Man
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(Original post by wowee10)
basically a secondary alkene is an alkene where the double bond between carbon atoms has two alkyl group on the carbon attached
Can you draw it for me?
What is the meaning of the first pic?
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charco
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(Original post by Mad Man)
Can anyone help?
The "Tip" as stated is nonsense - probably a typo.

You are not "using" an alkene, you are producing an alkene by elimination. It should say an "asymmetrical secondary haloalkane".

What it is trying to say is that you could have the bromine in such a position that elimination could produce two different alkenes.

CH3CHBrCH2CH3 can make both CH2=CHCH2CH3 and CH3CH=CHCH3
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Mad Man
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(Original post by charco)
The "Tip" as stated is nonsense - probably a typo.

You are not "using" an alkene, you are producing an alkene by elimination. It should say an "asymmetrical secondary haloalkane".

What it is trying to say is that you could have the bromine in such a position that elimination could produce two different alkenes.

CH3CHBrCH2CH3 can make both CH2=CHCH2CH3 and CH3CH=CHCH3
I see. I understand but I now fear that my source material is unreliable.
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charco
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(Original post by Mad Man)
I see. I understand but I now fear that my source material is unreliable.
I have yet to read a chemistry book that was 100% without typos.
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BlueChicken
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Sorry for late reply - agree with charco, it’s an alkene/alkane typo. I have looked at that section in the book and all the examples are an alkane (actually all halogenoalkanes) undergoing nucleophilic substitution or elimination (which is the point of that section).

The example at the end of the “Tip” is describing an alkane to alkene reaction, which further confirms the typo.
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_Rusty_
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(Original post by charco)
I have yet to read a chemistry book that was 100% without typos.
:lol:
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Mad Man
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#10
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Well thanks guys for preventing me from putting invalid notes in my flashcards!
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