Grignard Reagent Lab Report

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The purpose of this experiment was to prepare an unknown Grignard reagent and then identify the product by molecular weight and melting point. An IR reading was taken to further identify and validate what product was formed. DISCUSSION AND CONCLUSION Organometallic compounds consist of a carbon that is attached to a metal. The carbon atoms are strongly nucleophilic because of a partial negative charge that they carry. They carry this charge due to them being more electronegative compared to the metal atoms. Carbon-carbon bonds can be created using these nucleophilic carbons. One kind of organometallic is a Grignard reagent. These reagents can create carbon bonds for long carbon-carbon chains. R-MgX is the general formula for a Grignard reagent. …show more content…

Therefore, any reaction with a Grignard cannot be used because of this case that the strong nucleophilic carbon of the Grignard causes. Instead, aprotic solvents like THF and diethyl ether are used. Ethers are mostly used because of the oxygen that makes a complex with the Grignard reagent. Water and acid are highly avoided since they are a proton source. Making sure all glassware and tubes are well dried and that water cannot enter the reaction is a very important step. Many reactions take place in a Grignard reaction. Oxygen reacts with the Grignard to produce peroxides and carbon dioxide reacts to form R-CO2-MgX- complexes. Another reaction, which is inevitable, is a halide reacting with the Grignard. The first two reactions can be eliminated by performing the reaction in a vacuum while the halide reaction can only be

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