Polarity and distribution coefficient

[clairescribe]

I need to determine polarity of 3 compounds in order to intuit the relationship between their distribution coefficients in Ch2Cl2 and H20.

The three compounds are benzoic acid (with a carboxyl group on a benzene ring), succinic acid (a straight chain with 2 terminal carboxyl groups), and sodium benzoate (and ionic carboxyl group on a bezene ring). I think the order is sodium benzoate (ionic) then succinic acid (no benzene ring) then benzoic acid in decreasing polarity. But I'm not certain. Can anyone comment?

Thanks~

 

[GCT]

Does the succinic acid have an overall dipole moment?

 

[clairescribe]

dipole moment

there is no overall diploe moment mentioned.
thanks for responding.

 

[clairescribe]

no dipole moment either. whoops.

 

[GCT]

Would you say that benzoic acid has an overall polarity, a dipole moment?

 

[clairescribe]

ok. yes, all three have a dipole moment. benzoic acid's is the smallest as it has only one OH group to H-bond with. Succinic acid has 2 OH groups to H-bond with, and the sodium benzoate can form ionic bonds, trumping the other two.

 

[GCT]

Yes, you can correlate such matters with the solubility data which can be found on http://www.chemfinder.com, it took me a while to realize that all of this was pertinent to the topic of liquid-liquid extraction, I apologize for being so irrelevant.