Photobromination of Toluene Procedure: • 500 mL of toluene was added to a 2 liter beaker and equipped with a magnetic st

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Photobromination Of Toluene Procedure 500 Ml Of Toluene Was Added To A 2 Liter Beaker And Equipped With A Magnetic St 1 (43.9 KiB) Viewed 47 times

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Photobromination of Toluene Procedure: • 500 mL of toluene was added to a 2 liter beaker and equipped with a magnetic stir bar. The beaker was placed atop a stir plate and stirring commenced. . A high intensity UV light source was placed inside the beaker and secured to a ring stand using a clamp. The exterior of the UV light bulb was in direct contact with the toluene solution. • 50 mL of liquid bromine, Br₂, was added to the beaker causing the solution to change from colorless (before Br, was added) to a dark orange color. . With the entire assembly located inside a fume hood, the UV light source was turned on. Over the course of 10 minutes, the color of the solution changed from dark orange to light orange to colorless, after which time the UV light source was tuned off, . During the reaction, gaseous fumes were observed to emanate from the beaker. These fumes turned wetted pH paper red. As the solution slowly turned colorless, the formation of these fumes slowed and then eventually stopped. • The reaction mixture was transferred to a ll round bottom flask and a simple distillation apparatus was assembled. • The reaction mixture was distilled resulting in the collection of two separate fractions. Approximately 400 mL of distillate number 1 was collected at 110-111 °C while 100.1 mL of distillate number 2 was collected at 197-198 °C . Both fractions collected by distillation were analyzed (separately) by IR spectroscopy, ¹H NMR spectroscopy and 13C NMR spectroscopy.
D D Question 1 How many moles of toluene were utilized in the experiment described by the written procedure above? Question 2 Question 3 How many moles of molecular bromine, Br₂, were utilized in the experiment described by the written procedure above? Question 4 4 pts 4 pts What is the composition of the gaseous by-product that was observed to emanate from the reaction mixture, as described by the written procedure above? Type the molecular formula for this compound with no spaces. For example, if the gaseous by-product was water, you would type 20 O molecular bromine, 02 ⒸHOO O Wight toluene 2 pts What is the limiting reagent for this experiment (as described by the written procedure above)? 4 pts
D Question 5: What is the theoretical yield of product, expressed in grams, for the experiment with the written procedure above? Question 6 Which fraction collected during the distillation (described in the written procedure above) corresponds to the photobromination product? O the fraction collected between 197 and 195 degrees C O the fraction collected between 110 and 111 degrees C Question 7 4 pts Question 8 5 pts 4 pts What is the yield of photobromination product, expressed in grams, for the reaction described by the written procedure above? 4 pts What was the % yield for the photobromination product collected for the reaction described by the written procedure above?
D Photobromination of Toluene Procedure. • 500 mL of toluene was added to a 2 liter beaker and equipped with a magnetic stir bar. The beaker was placed atop a stir plate and stirring commenced. • A high intensity UV light source was placed insie the beaker and secured to a ring stand using a clamp. The exterior of the UV light bulb was in direct contact with the toluene solution. • 50 mL of liquid bromine, Br₂, was added to the beaker causing the solution to change from colorless (before Br₂ was added) to a dark orange color. . With the entire assembly located inside a fume hood, the UV light source was turned on. Over the course of 10 minutes, the color of the solution changed from dark orange to light orange to colorless, after which time the UV light source was tuned off. . During the reaction, gaseous fumes were observed to emanate from the beaker. These fumes turned wetted pH paper red. As the solution slowly turned colorless, the formation of these fumes slowed and then eventually stopped. . The reaction mixture was transferred to a 1 L round bottom flask and a simple distillation apparatus was assembled. . The reaction mixture was distilled resulting in the collection of two separate fractions. Approximately 400 mL of distillate number 1 was collected at 110-111 °C while 100.1 mL of distillate number 2 was collected at 197-198 °C. Both fractions collected by distillation were analyzed (separately) by IR spectroscopy, ¹H NMR spectroscopy and 13C NMR spectroscopy.
D 0 Question 1 How many moles of toluene were utilized in the experiment described by the written procedure above? Question 2 Question 3 How many moles of molecular bromine, Br₂, were utilized in the experiment described by the written procedure above? Question 4 4 pts 4 pts What is the composition of the gaseous by-product that was observed to emanate from the reaction mixture, as described by the written procedure above? Type the molecular formula for this compound with no spaces. For example, if the gaseous by-product was water, you would type 201 O molecular bromine 62 ⒸHOO Owlight toluene 2 pts What is the limiting reagent for this experiment (as described by the written procedure above)? 4 pts