Tuesday, January 7, 2014

Grignard Reaction

The Grignard Reaction Synthesis of triphenylmethanol Josh Wilson Chem 443-003 January 1,2012-February 7,2012 Introduction In this look into we synthesized triphenylmethanol from a Grignard reagent and an ester. To form triphenylmethanol we reacted methyl benzoate with phenylmagnesium bromide. Reaction Scheme: surmise An organo bronze compound is an original compound that contains a carbon copy-metallic bond. The metal plunder be Li, Na, Mg, Cu, Pd or any other transitional metal. In this research laboratoryoratory we used Mg as our metallic portion of the organometallic compound. Organometallic compounds be special in that they cause Carbon to become a nucleophile. More specifically in this lab we used R-Mg-Br an alkyl magnesium halide to project the nucleophillic properties onto the Carbon atom, cognize as a Grignard reagent because of it founder chemist Victor Grignard. The finding of Grignard reactions is to create a C-C bond, more specif ically a third or a secondary alcohol. The Grignard reagents are usually created with the solvents anhydrous diethyl ether or THF and are very air sensitive. The Grignard reagent are very prefatory which make them very good proton acceptors. In our experiment we created a ordinal alcohol by victimisation an ester and carbonyl molecule.
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The ester is born-again to a ketone than immediately reacts with the Grignard reagent to give the tertiary alcohol, triphenylmethanol. Reaction machine Procedure A. Preparation of the Grignard reagent * Weigh some .5 g of Magnesium turnings * en gage mortar and pastel to mill turnings ! * Put tunings into around layabout flaskful * Assemble frame-up * Prepare 2.4 mL of bromobenzene in 5 mL of anhydrous diethyl ether * Swirl mixture, than add 5mL to round bottom flask * Reflux reaction * Add .5 mL increments of the impractical declaration over 10 minutes B. Synthesis of Triphenylmethanol * Dissolve 1.2 mL of methyl benzoate in 5 mL of anhydrous diethyl ether *...If you call for to get a full essay, order it on our website: BestEssayCheap.com

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