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Dichloromethane and water

  1. Sep 12, 2009 #1
    Why caffeine is more soluble in dichloromethane than in water?
    I thought caffeine is more polar than water and water is more polar than dichloromethane, so shouldn't caffeine is more soluble in water than in dichloromethane, since their dipole moment is closer?
     
  2. jcsd
  3. Sep 13, 2009 #2

    Borek

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    Staff: Mentor

    Why do you think so?
     
  4. Sep 13, 2009 #3
    cuz the dipole moment of caffeine is larger than water
     
  5. Sep 13, 2009 #4

    Borek

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    Staff: Mentor

    This is not that simple. Caffeine molecule is much larger, so even small charge is separated over the large distance, wich makes dipole moment large - but the molecule is not that polar.

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  6. Sep 13, 2009 #5
    so is it because the charges are too separated that are almost interacting with other molecules independently in each bond?
     
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