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Topic: pyridine  (Read 5870 times)

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Offline syedbadshah

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pyridine
« on: September 30, 2006, 04:00:32 AM »

I have isolated a compound from a plant and was not soluble in , methanol, acetone, ethylacetate and hexane, but whene i apply pyridine it was easily solubalized, why?
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Offline Mitch

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Re: pyridine
« Reply #1 on: September 30, 2006, 04:09:25 AM »
What compound was it? Need more information than that.
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Offline syedbadshah

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Re: pyridine
« Reply #2 on: September 30, 2006, 06:00:36 AM »
Quote from: Mitch on September 30, 2006, 04:09:25 AM
What compound was it? Need more information than that.

The compound structure is not still characterized, but it was purified from the Dichloromethane fraction of plant crude methanolic extract, and also some other compounds are purified from the same fraction of that plant and was not soluble in the other previously mentioned solvents.e.g, methanol, dichloromethane, acetone , ethylacetate, but was soluble in pyridine. So, which are those properties of pyridine, due to which a compound isolated from plants is soluble in pyridine and not in the other commonly used organic solvents?
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Offline Yggdrasil

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Re: pyridine
« Reply #3 on: September 30, 2006, 01:47:34 PM »
Pyridine is considerably less polar than the other solvents you mentioned, so that would suggest to me that your unknown compound is fairly nonpolar (maybe an oil or lipid of some sort).

(p.s. I locked your other topic because it's the same as this one)
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Offline connor

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Re: pyridine
« Reply #4 on: October 01, 2006, 04:27:43 AM »
If your compound contains a carboxylic acid, it could be forming a pyridinium salt. The pyridinium salt would be more soluble in organic solvents than the free acid.
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Offline HP

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Re: pyridine
« Reply #5 on: October 01, 2006, 09:23:41 AM »
Also many alkaloids are well soluble in pyridine : "Similia similibus solventur"  ;)
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foxguy2004

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Re: pyridine
« Reply #6 on: October 05, 2006, 08:53:23 PM »
Quote from: connor on October 01, 2006, 04:27:43 AM
If your compound contains a carboxylic acid, it could be forming a pyridinium salt. The pyridinium salt would be more soluble in organic solvents than the free acid.


   I AGREE THAT AOBVE
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