EXPERIMENT 5 - EXPERIMENT 5: NITRATION OF METHYL BENZOATE...

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EXPERIMENT 5: NITRATION OF METHYL BENZOATE (ELECTROPHILIC AROMATIC SUBSTITUITION)Objectives1) To prepare and calculate the percentage yield of methyl m-nitrobenzoate by electrophilic aromaticsubstitution.2) To get the melting point of the product.IntroductionAromatic substitution is electrophilic, due to high density in benzene ring. Benzene ring is one ofcomponents in most important natural products and other useful products. The species reacting withthe aromatic ring is usually a positive ion or the end of a dipole.Nitration is one of the most important examples of electrophilic substitution. The electrophile innitration is the nitronium ion which is generated from nitric acid by protonation and loss of water, usingsulphuric acid as the dehydrating agent.Procedure1.6 mL of concentrated H2SO4is cooled in ice bath to 00C.2.3.05 g of methyl benzoate is added.3.The mixture is cooled and 2 mL of concentrated HNO3and 2 mL of concentrated H2SO4is addedslowly to the mixture.4.The mixture is then stirred and make sure to maintain its temperature below 150C.5.The mixture is then warmed to the room temperature.

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Term
Spring
Professor
prof roy
Tags
pH, Benzene, Sulfuric acid, Nitric acid, Methyl benzoate, Electrophilic aromatic substitution

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