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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PART D// find the experimental yield of crude and final product and theoretical yield.
![Experiment 9D: Diels-Alder Reaction (Data Sheet)
Running the reaction
0.21 g of tetraphenylcyclopentadienone, 0.105 g of anthranilic acid. and 1.2 mL of
1,2-dimethoxyethane are placed in a 25-mL round-bottom flask equipped with an air
condenser
The mixture was brought to a gentle boil
A solution of 0.40 mL of isopentyl nitrite in 1.0 mL of 1,2-dimethoxyethane was added
dropwise in 60 seconds; the evolution of gas was observed and a gradual change on color
towards brown
The mixture was refluxed for 15 minutes leading to an orange color
Product isolation:
The mixture was allowed to cool down to room temperature
The solution was poured into a beaker containing 10 mL of water and 5 mL of methanol
A yellow-orange, powdery solid formed that was isolated by vacuum filtration on a
Büchner funnel; after washing a solid with 2 mL of methanol, air was sucked through the
solids
The solids were recrystallized from 12 mL of hot isopropanol
After being placed in an ice-bath for 30 minutes, the fine, white crystal were isolated by
vacuum filtration on a Hirsch funnel
Product characterization
0.35 g of the crude product
g of the final product
M.p.: 192-196 °C (first melting point), 199-202 °C (second melting point)
0.21](/v2/_next/image?url=https%3A%2F%2Fcontent.bartleby.com%2Fqna-images%2Fquestion%2Fe95435bc-a475-4a00-877d-f3d82e369349%2F7d4ce256-b3f4-4b16-bb16-11d79155df03%2F4ybmlue_processed.png&w=3840&q=75)
Transcribed Image Text:Experiment 9D: Diels-Alder Reaction (Data Sheet)
Running the reaction
0.21 g of tetraphenylcyclopentadienone, 0.105 g of anthranilic acid. and 1.2 mL of
1,2-dimethoxyethane are placed in a 25-mL round-bottom flask equipped with an air
condenser
The mixture was brought to a gentle boil
A solution of 0.40 mL of isopentyl nitrite in 1.0 mL of 1,2-dimethoxyethane was added
dropwise in 60 seconds; the evolution of gas was observed and a gradual change on color
towards brown
The mixture was refluxed for 15 minutes leading to an orange color
Product isolation:
The mixture was allowed to cool down to room temperature
The solution was poured into a beaker containing 10 mL of water and 5 mL of methanol
A yellow-orange, powdery solid formed that was isolated by vacuum filtration on a
Büchner funnel; after washing a solid with 2 mL of methanol, air was sucked through the
solids
The solids were recrystallized from 12 mL of hot isopropanol
After being placed in an ice-bath for 30 minutes, the fine, white crystal were isolated by
vacuum filtration on a Hirsch funnel
Product characterization
0.35 g of the crude product
g of the final product
M.p.: 192-196 °C (first melting point), 199-202 °C (second melting point)
0.21
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