CHM235 LAB NOTES EXPERIMENT #40A

CHM235 LAB NOTES EXPERIMENT #40A - Procedural Notes: Exp....

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Procedural Notes:  Exp. 40A:  Resolution of ( ± )- -phenylethylamine α (Pavia et al, ed. 4, p. 331) 1. Prepare solutions per first procedural paragraph on p. 335 on first night and leave to sit until next lab period. 2. NOTE TO INSTRUCTOR:  May need to "seed" some solutions w/ crystals. 3. On second night, if preferred prismatic crystals have formed, proceed: otherwise, gently re-dissolve the needle-like  crystals and leave to crystallize again. 4. Vacuum filter the crystals w/ wash with 2 small portions of COLD methanol. 5. Transfer crystals to a 50 mL beaker and dissolve in 25 mL water + 4 mL of 50 % NaOH. 6. Extract with 3 x 10 mL of DCM in a separatory funnel. 7. 8. PREPARE:  Weigh a 25-mL Erlenmeyer w/ cork stopper. 9.
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This note was uploaded on 09/08/2010 for the course CHEMISTRY 235 taught by Professor Wikrent,pollyanna during the Spring '09 term at Pima CC.

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