why is sodium bisulfite used in the bromination of acetanilide
Mild reducing agent for Jones oxidation workups. Press question mark to learn the rest of the keyboard shortcuts. Please do not post entire problem sets or questions that you haven't attempted to answer yourself. 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. b. Write the chemical equation for the reaction in which this yellow color is discharged. Also please don't use this sub to cheat on your exams!! (2 pts) What is the formula for sodium bisulfite? Therefore, a solvent (in this case water) is used to dissolve and evenly disperse two reactants in it. We brominated anisole, aniline, and acetanilide. It is a common term used to describe almost pure acetic acid. Glacial acetic acid is not frozen ( cold) acetic acid. How is this reagent used? Post your questions about chemistry, whether they're school related or just out of general interest. Specifically, why is sodium bisulfite used? (2 pts) What is the formula for sodium sulfate? Synthesizing 2,4,6-tribromoaniline, I dissolved aniline in acetic acid. Dazu gehört der Widerspruch gegen die Verarbeitung Ihrer Daten durch Partner für deren berechtigte Interessen. 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. . Dies geschieht in Ihren Datenschutzeinstellungen. The reaction was . Cooled it and added bromine/acetic acid mixture. By using our Services or clicking I agree, you agree to our use of cookies. We then added a Br2/HBr mixture. A common application is in the workup of reactions involving bromine or iodine. . What is the use for this reagent in this experiment? Thanks. This is why glacial acetic acid is used. The bisulfite is used to reduce the excess molecular bromine to bromide ion. • 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 … (see lab 5) 3. After the reaction was "complete" we added H2O and sodium bisulfite to get the red color to disappear. Für nähere Informationen zur Nutzung Ihrer Daten lesen Sie bitte unsere Datenschutzerklärung und Cookie-Richtlinie. 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). . . Sodium bisulfite is used to discharge the yellow color produced in the electrophilic aromatic bromination of acetanilide. a. Sodium bisulfite is typically used as an aqueous solution. The acetamido group is electron donating and therefore it directs other substituents to the ortho and para positions. Damit Verizon Media und unsere Partner Ihre personenbezogenen Daten verarbeiten können, wählen Sie bitte 'Ich stimme zu.' . 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. acetanilide CH3 H O + acetic acid Both aniline and acetic anhydride are somewhat viscous liquids. Sodium bisulfite is typically used as an aqueous solution. aus oder wählen Sie 'Einstellungen verwalten', um weitere Informationen zu erhalten und eine Auswahl zu treffen. . Sie können Ihre Einstellungen jederzeit ändern. . My question is, what is the purpose of adding the sodium bisulfite? Mild reducing agent for bromine or iodine reaction workups (ex. The Acetanilide is a benzene with a acetamido group attached to it. bromination or iodination). First we dissolved one of the 3 compounds in glacial acetic acid. Yahoo ist Teil von Verizon Media. Note that the bisulfite does not do anything with the reaction, since you add it after the reaction. Daten über Ihr Gerät und Ihre Internetverbindung, darunter Ihre IP-Adresse, Such- und Browsingaktivität bei Ihrer Nutzung der Websites und Apps von Verizon Media. This is apparently a thing now that people are writing exams from home. So, simply mixing them together does not result in the efficient formation of acetanilide. The primary focus of this lesson is on a specific organic chemistry reaction: namely, the bromination of acetanilide. Sodium bisulfite (NaHSO3) is a weakly acidic compound that is usually used as a mild reducing agent. Note that the bisulfite does not do anything with the reaction, since you add it … Sodium bisulfite (NaHSO3) is a weakly acidic compound that is usually used as a mild reducing agent. What is the source of the yellow color? Press J to jump to the feed. 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). . The layers were separated and the aq layer was . 2. . The bisulfite is used to reduce the excess molecular bromine to bromide ion. We then performed a crystallization and then a recrystallization. New comments cannot be posted and votes cannot be cast. Our goal is to understand how the reaction happens in terms of its mechanism. Once I had done that, I was asked to put my mixture in water "containing 1 g of sodium bisulfite". . A common application is in the workup of reactions involving bromine or iodine. If water is present, bromine will react with water, rather than with aniline. The mixture was diluted with ether (600 mL) and washed with 2% aq NaHSO3 (5 x 100 mL). Cookies help us deliver our Services.

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