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Author Topic: Isomers  (Read 662 times)

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Ter

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Isomers
« on: January 16, 2013, 04:13:42 PM »

Why doesn't this have isomers? Please explain it to me, thank you very much really!
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Hunter2

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Re: Isomers
« Reply #1 on: January 16, 2013, 06:45:20 PM »

The molecule itself has no isomer. But if you exchange X with Y then you have the possibility of 3 isomers.

1,1 Di(X)-2,2 di(Y) Ethylene, cis-1,2 Di(X)-1,2 di(Y) Ethylene, trans-1,2 Di(X)-1,2 di(Y) Ethylene
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Borek

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Re: Isomers
« Reply #2 on: January 16, 2013, 09:54:46 PM »

[*:1]C([*:1])=C([*:2])[*:2]

What is an isomer? What kind of isomers do you think would be possible?
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Ter

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Re: Isomers
« Reply #3 on: January 17, 2013, 04:35:53 AM »

From what I know, an isomer is the different structural arrangement of atoms within the molecule.

Since the atoms can 'move', then it can have isomers can't it? eg. X placed diagonally within the molecule like a trans isomer, I was thinking that the isomers would be cis and trans since the atoms can be moved.

Please correct me, I know I am wrong here but I really dont know why,
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Borek

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Re: Isomers
« Reply #4 on: January 17, 2013, 04:56:33 AM »

What do you mean by "atoms can move"? When you exchange X with Y (or R1 with R2) you will get a different molecule.
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curiouscat

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Re: Isomers
« Reply #5 on: January 17, 2013, 06:03:28 AM »

The molecule itself has no isomer.

It does, I think. The ones you wrote.
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curiouscat

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Re: Isomers
« Reply #6 on: January 17, 2013, 06:04:30 AM »

What do you mean by "atoms can move"? When you exchange X with Y (or R1 with R2) you will get a different molecule.

Which is an isomer of the parent molecule.
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discodermolide

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Re: Isomers
« Reply #7 on: January 17, 2013, 06:05:51 AM »

Don't forget the plane of symmetry.
As drawn there is one trans isomer.
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