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anonymous

  • one year ago

What is the energy barrier for the counterclockwise rotation of the rear carbon in the following Newman projection? (I just need a minute to draw the projection out!)

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  1. anonymous
    • one year ago
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    |dw:1443127449642:dw|

  2. anonymous
    • one year ago
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    I struggle with Newman projections and don't know if i'm doing this right but in the Newman Projection to the left |dw:1443127849169:dw| would this be correct so far?

  3. Frostbite
    • one year ago
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    I'm not quite sure what you exactly what you want. Do you want a energy profile?

  4. anonymous
    • one year ago
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    Yes I believe so

  5. Frostbite
    • one year ago
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    Alright. Now the molecule building sets would be an advantage, but the Newman projection is perfect for it. In energy profiles regarding bond rotation one of the most important things to have in mind is steric hindrance. This must obviously occur at the highest whenever we have two groups aligned. And the steric hindrances must also become larger when the side groups become larger (as a rule of thumb). |dw:1443128650635:dw| Try draw the energy profile as a function of the bond rotation from 0 to 360 degrees.

  6. Frostbite
    • one year ago
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    You can maybe use this for inspiration: http://www.chemgapedia.de/vsengine/media/vsc/en/ch/2/oc/stoffklassen/systematik_struktur/acyclische_verbindungen/gesaettigte_kohlenwasserstoffe/alkane/butan_rotation_en.gif I sure hope this is what you are looking for.

  7. anonymous
    • one year ago
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    Thank you for the link! I'm going to draw it and see what I can come up with

  8. Frostbite
    • one year ago
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    Sounds good. I can always come and check if it is.

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