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Chemistry Forums for Students => Organic Chemistry Forum => Topic started by: foran1 on April 28, 2010, 09:23:29 PM

Title: recrystallization
Post by: foran1 on April 28, 2010, 09:23:29 PM

I have a question:
when would you avoid recrystallizing a solid?

I know only two cases when recrystallization wouldn't work:
1) low melting solids (but I doubt that my compound is really low melting)
2) highly impure solids (it's not that impure)

any other ideas?

Title: Re: recrystallization
Post by: Smrt guy on April 29, 2010, 09:55:12 PM

low solution stability.  I work with organometallics and I often have issues with solution stability. 

Title: Re: recrystallization
Post by: AC Prabakar on April 29, 2010, 11:29:11 PM

If we have other method than recrystallization to purify compounds we can avoid.
For example,in a matrix if u have both acid and base you can easily purify one of them by simple work up(by knowing its pKa value.