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DLS

Can anyone explain what this means?

  • one year ago
  • one year ago

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  1. DLS
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    Stability of enolic-content: Important factors:Solvent: In polar solvent e.g water,alchohol,acetic acid etc,which can form H-bonding with -C=O group,enolic content decreases while in non polar solvent e.g Hexane,benzene etc. enolic content increases..e.g: enolic content of aceto acetic ester is Methanol =7% in Hexane=46%.

    • one year ago
  2. abb0t
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    This can be best explained with resonance. It gives the molecule more stability since it can distribute it's electrons around and hence, it's charge, making it less likely for it to accept a proton

    • one year ago
  3. DLS
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    what has that got to do with hydrogen bonding?

    • one year ago
  4. abb0t
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    I think what it's saying is that due to the ability of the electrons to do more resonance, distributing it's charge, it increases it's enolic properties. I don't rly understand the last part though. acetoacetic ester methanol = 7%?

    • one year ago
  5. DLS
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    aceto acetic ester in* Methanol =7% in Hexane=46%.

    • one year ago
  6. andrefontex
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    i think its not IS in "content of aceto acetic ester is Methanol =7% in Hexane=46%" its in. in methanol, in hexane. In hexane hidrogen bonds are less likely to happen, or don't happen at all, cous its non-polar. As methanol is a polar solvent, hidrogen bonds can be formed. interfering with the C=O bond.

    • one year ago
  7. DLS
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    what is the effect of this H-bond on enolisation?

    • one year ago
  8. andrefontex
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    |dw:1358099149435:dw|

    • one year ago
  9. abb0t
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    |dw:1358099383930:dw|

    • one year ago
  10. DLS
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    No one is clear enough with their answers.

    • one year ago
  11. andrefontex
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    |dw:1358099459659:dw|

    • one year ago
  12. andrefontex
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    resonance decreases if the oxygen from ceto has a polar molecule interfering, i guess

    • one year ago
  13. shubhamsrg
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    Can you tell me which is more polar ? enol form or keto form ?

    • one year ago
  14. DLS
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    keto..

    • one year ago
  15. andrefontex
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    idd

    • one year ago
  16. shubhamsrg
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    Reason ?

    • one year ago
  17. DLS
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    no idea,wild guess

    • one year ago
  18. andrefontex
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    because delta minus is higher on the ceto. oxygen has higher delta-

    • one year ago
  19. DLS
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    yes..

    • one year ago
  20. andrefontex
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    more electrons

    • one year ago
  21. shubhamsrg
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    Intra molecular hydrogen bonding.

    • one year ago
  22. andrefontex
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    what?

    • one year ago
  23. DLS
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    :o

    • one year ago
  24. shubhamsrg
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    Intra molecular hydrogen bonding is the reason that enol form is less polar than keto form.

    • one year ago
  25. DLS
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    what effect is H-bonding producing?(4th time)

    • one year ago
  26. shubhamsrg
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    Thus, more polar the solvent, more polar form will be preferred. i.e. keto form is preferred for more polar solvents.

    • one year ago
  27. shubhamsrg
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    You understand Intra molecular hydrogen bonding ?

    • one year ago
  28. DLS
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    i actually forgot that :/ and i dont know its application like when does it occur n stuff

    • one year ago
  29. andrefontex
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    btw, iam not quite sure if ceto is more polar then enolic form..

    • one year ago
  30. DLS
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    lol

    • one year ago
  31. andrefontex
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    they existe both forms, but depending on circumstances, it will occur the more stable one

    • one year ago
  32. DLS
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    yep^

    • one year ago
  33. DLS
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    ill get going,see if you guys can get it..got an exam tomorrow! Cya.

    • one year ago
  34. andrefontex
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    bye

    • one year ago
  35. shubhamsrg
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    |dw:1358100903701:dw|

    • one year ago
  36. abb0t
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    enol form is less stable. Keto form is more stable.

    • one year ago
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