Essay about Nitration of Methyl Benzoate

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Bachelor of Science in Human Biology
College of Science, De La Salle University - Dasmariñas

Aromatic hydrocarbons are electron rich and are stable because it has a benzene ring. It undergoes Electrophilic aromatic substitution, and the nitration of methyl benzoate illustrates this type of reaction. The objective of this experiment is to synthesize methyl m-nitrobenzoate from methyl benzoate and will be purified by recrystallization with methanol. To make sure that the correct product is formed, the melting point and tlc profile are obtained. For the results, the mass of the conical flask was 89.222g, adding
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First is the recrystallization of methanol. Recrystallization is a purification technique. The properties of the solvent to be used are it must have a low boiling point, must not react with the product, and the product must not be toxic.
Next is the percentage yield. In chemistry, percentage yield serves to measure the effectiveness of a synthetic procedure, (McMurry 2011) but there are reasons why we do not get 100% yield in this experiment. First, not all of the reactants reacted with HNO3, some products are left on the filter paper, and third, some products were dissolved by the wash solvent.
The first of two tests to determine purity is the melting point determination. A melting point is a characteristic property of a compound, it is the temperature when a solid and liquid phases of a compound coexist, the temperature at which it changes state from solid to liquid at atmospheric pressure. (Pine 1987) To get the melting point range, we get the difference of the temp when the sample melted and the temp where the compound started melting. If the melting point range is greater than 3C, the product is impure. The second test is the thin layer chromatography. Chromatography is the differential migration of the components of a mixture along the stationary phase and mobile phase. (Morisson, 1979) TLC is a separation technique, and it has two phases: stationary, which is the silica on the tlc plate, and mobile, which is the ethyl
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