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Unformatted text preview: ionic - polar COMBINED AQ. LAYERS NaOH washes and small amts of Wash with brine aqueous (bottom) organic (top) H 2 O, NaCl MTBE, caffeine less water 1. Stir with Na 2 SO 4 2. Filter filtrate solid MTBE, caffeine Na 2 SO 4, H 2 O MTBE (bp = 55-56 o C) caffeine PURE 1. 6M HCl O O O O CH 3 + H O OH O O CH 3 + NaCl (aq) Na + ionic-water soluble less polar - less water soluble 1.cool to ppt 2. Filter filtrate H 2 O + some aspirin if too warm or too much water 3. Wash with ICE cold H 2 O NaCl aspirin + H 2 O (dry until next week in drawer) + small amounts of MTBE and caffeine rotary evaporator CH 3 CH 3...
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- Fall '08
- Organic chemistry