Orgo 2 Lab 5.docx - Cat Olson CHEM 2204 TA: Dr. William...

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Cat OlsonLab Performed: 10/5/2020CHEM 2204Lab Due: 10/12/2020TA: Dr. William BowieExperiment 16: Grignard Reaction with a Ketone Part II – Purification and TLC AnalysisObjective:The purpose of this experiment was to purify the crude product created by theGrignard reaction in Part 1. In that experiment, phenylmagnesium bromide was reacted withbenzophenone to create triphenylmethanol. Purification will be achieved through trituration withligroin. Thin-layer chromatography was used to analyze the purified sample and compare itscomposition with that of the crude product.Experimental Procedure:The procedure was followed as described in Mayo’s manual pages275-282, along with the modifications listed in the Canvas document “Grignard ModificationsPart 2.”Reaction Scheme:Creation of Phenylmagnesium BromideMg, Et2OHBromobenzenePhenylmagnesium bromideReaction of Phenylmagnesium Bromide with BenzophenoneDiethyl ether, 30 degrees C+H+, H2O+ Mg(OH)BrData and Results:Values from Last Week’s Lab:

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Term
Fall
Professor
FINDEISEN
Tags
Stoichiometry, Diethyl ether, Grignard reaction, phenylmagnesium bromide

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