Thursday, November 29, 2007

work up of a reaction

1. usually, in small scale, dilute the rxn mixture with ether and let the rxn mixture pass through a pad of silica gel will remove all the polar/inorganic compounds. then remove the ether by rotavapor and then ready for a column.
2. MgSO4 is better than Na2SO4 as the drying reagent. Much quicker, more efficient and less water.
3. silica gel can also trap water so it is not necessary to use MgSO4 before a column.

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