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Product characterization: 0.91 g of the crude product 0.77 g of the final product M.p. (crude): 85-93 °C • M.p. (final): 104-106 °C

Product characterization: 0.91 g of the crude product 0.77 g of the final product M.p. (crude): 85-93 °C • M.p. (final): 104-106 °C

Chemistry
Chemistry
10th Edition
ISBN:9781305957404
Author:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste
Publisher:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste
Chapter1: Chemical Foundations
Section: Chapter Questions
Problem 1RQ: Define and explain the differences between the following terms. a. law and theory b. theory and...
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Product characterization: 0.91 g of the crude product 0.77 g of the final product М.р. (crude): 85-93 °C М.р. (final): 104-106 °C
Transcribed Image Text:Product characterization: 0.91 g of the crude product 0.77 g of the final product М.р. (crude): 85-93 °C М.р. (final): 104-106 °C
Setup: • placed 1.15 g of 1,4-dimethoxybenzene, 2.2 mL of tert.-butyl alcohol, and 3.4 mL glacial acetic acid in a 125-mL Erlenmeyer flask • the mixture was swirled until the solids dissolved and then placed in an ice bath for 10 minutes Running the reaction: • 4.50 mL of concentrated sulfuric acid were placed in an ice bath for 10 minutes • the sulfuric acid was added dropwise to the cooled reaction mixture while swirling (~ 10 minutes) • the reaction mixture was placed on the bench and allowed to warm up to room temperature (~15 minutes), was swirled three times during this time Product isolation: • 14 g of ice was added to the reaction mixture before 50 mL of water was added to cause precipitation of a beige-colored solid • the solids were isolated on a small Büchner funnel using vacuum filtration, washed with water, and allowed to dry until the next meeting • the crude product was recrystallized from a total of 10 mL of hot methanol • the solution could cool to room temperature (~10 minutes) and then placed in an ice bath (~15 minutes) • Upon cooling, a light beige solid formed that was isolated by vacuum filtration • The solid was washed with 2 mL of ice-cold methanol and then air sucked through the solids to dry them (20 minutes) Product characterization: 0.91 g of the crude product • 0.77 g of the final product М.р. (сrude): 85-93 °C М.р. (final): 104-106 °C
Transcribed Image Text:Setup: • placed 1.15 g of 1,4-dimethoxybenzene, 2.2 mL of tert.-butyl alcohol, and 3.4 mL glacial acetic acid in a 125-mL Erlenmeyer flask • the mixture was swirled until the solids dissolved and then placed in an ice bath for 10 minutes Running the reaction: • 4.50 mL of concentrated sulfuric acid were placed in an ice bath for 10 minutes • the sulfuric acid was added dropwise to the cooled reaction mixture while swirling (~ 10 minutes) • the reaction mixture was placed on the bench and allowed to warm up to room temperature (~15 minutes), was swirled three times during this time Product isolation: • 14 g of ice was added to the reaction mixture before 50 mL of water was added to cause precipitation of a beige-colored solid • the solids were isolated on a small Büchner funnel using vacuum filtration, washed with water, and allowed to dry until the next meeting • the crude product was recrystallized from a total of 10 mL of hot methanol • the solution could cool to room temperature (~10 minutes) and then placed in an ice bath (~15 minutes) • Upon cooling, a light beige solid formed that was isolated by vacuum filtration • The solid was washed with 2 mL of ice-cold methanol and then air sucked through the solids to dry them (20 minutes) Product characterization: 0.91 g of the crude product • 0.77 g of the final product М.р. (сrude): 85-93 °C М.р. (final): 104-106 °C
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Given:

Mass of Crude product = 0.77 g

Mass of Final product = 0.91 g

 

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