why is sodium bisulfite used in the bromination of acetanilide
Cooled it and added bromine/acetic acid mixture. We brominated anisole, aniline, and acetanilide. First we dissolved one of the 3 compounds in glacial acetic acid. (2 pts) What is the formula for sodium bisulfite? (see lab 5) 3. . New comments cannot be posted and votes cannot be cast. This is why glacial acetic acid is used. (2 pts) What is the formula for sodium sulfate? A common application is in the workup of reactions involving bromine or iodine. The bisulfite is used to reduce the excess molecular bromine to bromide ion. The bisulfite is used to reduce the excess molecular bromine to bromide ion. . A common application is in the workup of reactions involving bromine or iodine. Sodium bisulfite (NaHSO3) is a weakly acidic compound that is usually used as a mild reducing agent. . Sodium bisulfite is used to discharge the yellow color produced in the electrophilic aromatic bromination of acetanilide. The reaction was . Wir und unsere Partner nutzen Cookies und ähnliche Technik, um Daten auf Ihrem Gerät zu speichern und/oder darauf zuzugreifen, für folgende Zwecke: um personalisierte Werbung und Inhalte zu zeigen, zur Messung von Anzeigen und Inhalten, um mehr über die Zielgruppe zu erfahren sowie für die Entwicklung von Produkten. Note that the bisulfite does not do anything with the reaction, since you add it … bromination or iodination). The primary focus of this lesson is on a specific organic chemistry reaction: namely, the bromination of acetanilide. . After the reaction was "complete" we added H2O and sodium bisulfite to get the red color to disappear. This way the aqueous workup is easier as you don't have any bromine left which 1. colors your compound and 2. eats away your mucous membranes. Note that the bisulfite does not do anything with the reaction, since you add it after the reaction. Sodium bisulfite is typically used as an aqueous solution. 1) Patent Reference: WO2012129338, page 84, (12.0 MB), 2) Patent Reference: WO2011017578, page 69, (8.3 MB), 4) www.sigmaaldrich.com: Sodium bisulfite (link). Mild reducing agent for Jones oxidation workups. Once I had done that, I was asked to put my mixture in water "containing 1 g of sodium bisulfite". Cookies help us deliver our Services. a. The mixture was stirred at RT for 1 h, after which time it was poured into ice/H2O (30 mL) containing NaHSO3 (257 mg, 2.46 mmol). . We then added a Br2/HBr mixture. What is the use for this reagent in this experiment? 2. acetanilide CH3 H O + acetic acid Both aniline and acetic anhydride are somewhat viscous liquids. . Thanks. If water is present, bromine will react with water, rather than with aniline. Specifically, why is sodium bisulfite used? What is the source of the yellow color? Glacial acetic acid is not frozen ( cold) acetic acid. aus oder wählen Sie 'Einstellungen verwalten', um weitere Informationen zu erhalten und eine Auswahl zu treffen. By using our Services or clicking I agree, you agree to our use of cookies. The layers were separated and the aq layer was . Sodium bisulfite is typically used as an aqueous solution. . Daten über Ihr Gerät und Ihre Internetverbindung, darunter Ihre IP-Adresse, Such- und Browsingaktivität bei Ihrer Nutzung der Websites und Apps von Verizon Media. Also please don't use this sub to cheat on your exams!! How is this reagent used? Our goal is to understand how the reaction happens in terms of its mechanism. Yahoo ist Teil von Verizon Media. My question is, what is the purpose of adding the sodium bisulfite? Write the chemical equation for the reaction in which this yellow color is discharged. • This method involves rxn of sodium hypochlorite under acidic conditions w/ sodium bromide to generate molecular bromine "in situ"; this is a redox rxn, where bleach oxidizes bromine to bromine Any excess bromine that remains is reduced back to bromide by addition of reducing agent sodium … The acetamido group is electron donating and therefore it directs other substituents to the ortho and para positions. Sodium bisulfite (NaHSO3) is a weakly acidic compound that is usually used as a mild reducing agent.

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