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A reaction was carried out between maleic anhydride (MA) and anthracene (A). The final reaction mixture...
A reaction was carried out between maleic anhydride (MA) and anthracene (A). The final reaction mixture...
A reaction was carried out between maleic anhydride (MA) and anthracene (A). The final reaction mixture (R) and samples of both starting materials were spotted on a TLC plate and run. Which plate shows that the reaction mixture contains a new product and anthracene as the excess reagent? А MA R 10 0 A MA R AMA R 0 AMA R AMA R 0 A MA 20
Rank the following compounds from largest RF (on the left) to smallest Rf (on the right)...
Rank the following compounds from largest RF (on the left) to smallest Rf (on the right) in a TLC run with hexanelethyl acetate mobile phase. OH Di O I>II>11 ||I>II> 111>I>II 11>I>I|| A reaction was carried out between maleic anhydride (MA) and anthracene (A). The final reaction mixture (R) and samples of both starting materials were spotted on a TLC plate and run. Which plate shows that the reaction mixture contains a new product and maleic anhydride as excess reagent?...
Calculate the theoretical yield of the Diels-Alder reaction between anthracene (100 mg) and maleic anhydride (55...
Calculate the theoretical yield of the Diels-Alder reaction between anthracene (100 mg) and maleic anhydride (55 mg). Which is the limiting reagent ? Show all calculation steps.
Assume you obtained 13C NMR spectra for the maleic anhydride and the final product. By comparing...
Assume you obtained 13C NMR spectra for the maleic anhydride and
the final product. By comparing the two spectrums, provide evidence
for the presence of Diels Alder cycloadduct.
1. Briefly describe the evidence you have to support that your final product is pure? 2. Assume you obtained C NMR spectra for the maleic anhydride and the final product. By comparing the two spectrums, provide evidence for the presence of Diels Alder cycloadduct. 3. What starting materials would be necessary to...
What is the objective of this experiment? The reaction solvent for this experiment is xylene. What...
What is the objective of this experiment?
The reaction solvent for this experiment is xylene. What
property of this solvent makes it a better choice than toluene or
benzene?
Draw the orbitals involved in the 4+2 electrocyclization for
this reaction. Draw the structures of the reactants as best you
can. It may be appropriate to abbreviate the structure of
anthracene.
IR is not provided for this reaction product. Why is IR not
useful for monitoring the reaction or characterizing the...
EXPERIMENT 2A DIELS-ALDER REACTION OF ANTHRACENE REFERENCES Pavia et al (4/e): Tech. 6.1/6.2, 7.2-7.4 Klein (1/e)...
EXPERIMENT 2A DIELS-ALDER REACTION OF ANTHRACENE REFERENCES Pavia et al (4/e): Tech. 6.1/6.2, 7.2-7.4 Klein (1/e) pp. 784-792 EQUATION heat Diels-Alder Adduct 9,30-dihydroanthracene-9,10- endo-o B-seccinic anhydride mp 262264 PROCEDURE Place 0.200 grams of anthracene and an equal molar amount of maleic anhydride in 5 mL of xylenes in a 10-mL round-bottom flask with a magnetic stir bar. Attach a water-cooled condenser and reflux for 60 minutes. Allow the solution to cool to room temperature and then place the flask in...
Oral Chemistry spermat Laboratory Me (CHEM Land ) 4. WHY is this reaction carried out in...
Oral Chemistry spermat Laboratory Me (CHEM Land ) 4. WHY is this reaction carried out in a solvent mixture that contains both water in which the 10% NaOH is dissolved) and alcohol ? Why can't either solvent be used alone ? 5. Draw TWO acceptable resonance structures for the carbanion produced when NaOH reacts with acetone. 6. What is the relative purity of the product based upon its melting range? What should be the approximate location of the C-0 in...
Only need help with 5,6,7 and mechanism FTIR and NMR Spectra After completing a reaction and...
Only need help with 5,6,7
and mechanism
FTIR and NMR Spectra After completing a reaction and working up the products, it is still necessary to confirm that the correct product was formed. The most common tools used for this analysis are Fourier Transform Infrared (FTIR) and Nuclear Magnetic Resonance (NMR) spectroscopy. In the virtual laboratory, 'H and C NMR spectra are available. Details on interpreting FTIR and NMR spectra are found in your textbook. Your instructor may or may not...
CONCEPT QUESTIONS Mechanism. While the reaction carried out in lab used potassium hydroxide as the catalyst,...
CONCEPT QUESTIONS Mechanism. While the reaction carried out in lab used potassium hydroxide as the catalyst, many other catalysts have been developed to increase regioselectivity and stereoselectivity in aldol condensations. One small molecule catalyst commonly used is proline, a naturally occurring amino acid. The mechanism involves the initial formation of an enamine; predict the structure of this enamine intermediate intermediate A), and draw the mechanism for the conversion of intermediate A to intermediate B. Helpful Hint: The formation of the...
Pre-Lab Assignment 1) Draw the reaction mechanism for the reaction. 2) Determine the limiting reagent. Procedure...
Pre-Lab Assignment
1) Draw the reaction mechanism for the reaction.
2) Determine the limiting reagent.
Procedure 1 Place approximately 1 g of stilbene dibromide prepared in last week's experiment in a 50 mL round bottom flask. Record the exact mass. Add 0.8 g of KOH and 4 mL of triethylene glycol from the syringe provided in the fume hood (rinse any crystals from the sides of the flask while adding triethylene glycol). 2 Heat the stirred reaction mixture to a...
A reaction was carried out between maleic anhydride (MA) and anthracene (A). The final reaction mixture (R) and samples of both starting materials were spotted on a TLC plate and run. Which plate shows that the reaction mixture contains a new product and anthracene as the excess reagent? А MA R 10 0 A MA R AMA R 0 AMA R AMA R 0 A MA 20
Rank the following compounds from largest RF (on the left) to smallest Rf (on the right) in a TLC run with hexanelethyl acetate mobile phase. OH Di O I>II>11 ||I>II> 111>I>II 11>I>I|| A reaction was carried out between maleic anhydride (MA) and anthracene (A). The final reaction mixture (R) and samples of both starting materials were spotted on a TLC plate and run. Which plate shows that the reaction mixture contains a new product and maleic anhydride as excess reagent?...
Assume you obtained 13C NMR spectra for the maleic anhydride and
the final product. By comparing the two spectrums, provide evidence
for the presence of Diels Alder cycloadduct.
1. Briefly describe the evidence you have to support that your final product is pure? 2. Assume you obtained C NMR spectra for the maleic anhydride and the final product. By comparing the two spectrums, provide evidence for the presence of Diels Alder cycloadduct. 3. What starting materials would be necessary to...
What is the objective of this experiment?
The reaction solvent for this experiment is xylene. What
property of this solvent makes it a better choice than toluene or
benzene?
Draw the orbitals involved in the 4+2 electrocyclization for
this reaction. Draw the structures of the reactants as best you
can. It may be appropriate to abbreviate the structure of
anthracene.
IR is not provided for this reaction product. Why is IR not
useful for monitoring the reaction or characterizing the...
EXPERIMENT 2A DIELS-ALDER REACTION OF ANTHRACENE REFERENCES Pavia et al (4/e): Tech. 6.1/6.2, 7.2-7.4 Klein (1/e) pp. 784-792 EQUATION heat Diels-Alder Adduct 9,30-dihydroanthracene-9,10- endo-o B-seccinic anhydride mp 262264 PROCEDURE Place 0.200 grams of anthracene and an equal molar amount of maleic anhydride in 5 mL of xylenes in a 10-mL round-bottom flask with a magnetic stir bar. Attach a water-cooled condenser and reflux for 60 minutes. Allow the solution to cool to room temperature and then place the flask in...
Oral Chemistry spermat Laboratory Me (CHEM Land ) 4. WHY is this reaction carried out in a solvent mixture that contains both water in which the 10% NaOH is dissolved) and alcohol ? Why can't either solvent be used alone ? 5. Draw TWO acceptable resonance structures for the carbanion produced when NaOH reacts with acetone. 6. What is the relative purity of the product based upon its melting range? What should be the approximate location of the C-0 in...
Only need help with 5,6,7
and mechanism
FTIR and NMR Spectra After completing a reaction and working up the products, it is still necessary to confirm that the correct product was formed. The most common tools used for this analysis are Fourier Transform Infrared (FTIR) and Nuclear Magnetic Resonance (NMR) spectroscopy. In the virtual laboratory, 'H and C NMR spectra are available. Details on interpreting FTIR and NMR spectra are found in your textbook. Your instructor may or may not...
CONCEPT QUESTIONS Mechanism. While the reaction carried out in lab used potassium hydroxide as the catalyst, many other catalysts have been developed to increase regioselectivity and stereoselectivity in aldol condensations. One small molecule catalyst commonly used is proline, a naturally occurring amino acid. The mechanism involves the initial formation of an enamine; predict the structure of this enamine intermediate intermediate A), and draw the mechanism for the conversion of intermediate A to intermediate B. Helpful Hint: The formation of the...
Pre-Lab Assignment
1) Draw the reaction mechanism for the reaction.
2) Determine the limiting reagent.
Procedure 1 Place approximately 1 g of stilbene dibromide prepared in last week's experiment in a 50 mL round bottom flask. Record the exact mass. Add 0.8 g of KOH and 4 mL of triethylene glycol from the syringe provided in the fume hood (rinse any crystals from the sides of the flask while adding triethylene glycol). 2 Heat the stirred reaction mixture to a...
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