CHM 1311 Lecture Notes - Lecture 1: Grignard Reaction, Reaction Mechanism, Reagent
24 Jun 2016
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Experiment five: preparation of benzoic acid using a. The following reaction mechanism demonstrates the synthesis of benzoic acid using a grignard reagent that occurred during the lab: Anhydrous diethyl ether 74. 122 20. 0 ml 0. 714 193. Mass of magnesium weighed was 0. 80 g. it was a silver, metallic, and lustrous metal present in flat strips. It was a dark silver, shiny metal present in small rocky chunks. Anhydrous diethyl ether: clear, colourless liquid; pungent odour. Mixture of the above four reagents: the colour of the solution turns dark brown; slowly turns yellow with bubbles at the top; the mixture loses its brown colour but then quickly regains it. Solution in hot water bath: the bubbles continue; the solution has a dark brown colour; the bubbles are still continuing after 5 minutes upon placement of the solution in the bath. 15-20 mins in the hot water bath: the solution has a dark brown colour, and it"s fairly clear.
