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Topic: Using Hexane as Recrystallizing solvent for Trans-stilbene  (Read 4648 times)

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Offline vverityv

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Using Hexane as Recrystallizing solvent for Trans-stilbene
« on: March 02, 2013, 12:01:40 AM »
I'm having trouble with WHY hexane makes a good recrystallizing solvent for trans-stilbene.

I've already completed the experiment, so I know that it does work.  Trans-stilbene will recrystallize in hexane.  However, I was told by my instructor to use this solvent.  It probably would've been my last choice because I know that in choosing a solvent you should pick one that differs slightly in polarity.

Going with the saying 'like dissolves like,'  isn't trans-stilbene nonpolar?  Hexane is nonpolar, so why would trans-stilbene be only slightly soluble in hexane at room temperature and not fully soluble?  I have a feeling that it either has something to do with the molecular weight or the aromatic rings, but I'm not sure.  Any help would be greatly appreciated! :)

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