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O Benzoin Biphenyl Benzil 1. Which of the above compounds would you expect to the have...
4) sketch what a developed and resolved TLC plate of a mixture of benzil, benzoin and...
4) sketch what a developed and resolved TLC plate of a mixture of benzil, benzoin and hydrobenzoin might look like. Discuss the relative Rf values on your sketched plate 5) In the reduction of benzil with sodium borohydride, 3 compounds are possible: meso-hydrobenzoin, racemic-hydrobenzoin and racemic-benzoin (resulting from incomplete reduction of benzil). Discuss how you determined (or will go about determining) which of these products was produced. Discuss evidence from melting points, TLC and IR spectra.
Which of the following compounds would you expect to have the lowest Rf value on a...
Which of the following compounds would you expect to have the lowest Rf value on a silica gel TLC plate developed with dichloromethane? O A. Naphthalene O B. Phenyl acetate OC Butyric acid QUESTION 3 Which of the following compounds would you expect to have the highest Rf value on a silica gel TLC plate developed with dichloromethane? O A 2-octanone O B. Acetic acid C. 1-butanol OD. decane E. acetaldehyde
9. Based on looking at your TLC plate taken during step 2 of Dilantin synthesis, answer...
9. Based on looking at your TLC plate taken during step 2 of Dilantin synthesis, answer the following questions (a) Which is more polar, benzoin or benzil? Circle Below. Benzoin Benzil (b) Now look at the structures of benzoin and benzil. Specifically explain why one of these compounds has a lower Rr value than the other. You must address structure in your answer. Explain in one or two sentences (c) How can you tell by TLC if your reaction went...
1. Which one of the following two compounds would you expect to have a higher solubility...
1. Which one of the following two compounds would you
expect to have a higher solubility in liquid CO2. Explain your
reasoning in a few sentences:
2. Explain why percent recovery is utilized in the CO2
extraction of Eugenol as opposed to a theoretical yield. Limit
yourself to 1-3 sentences.
3. List 3 signals that should be observed in the IR
spectrum of Eugenol (whose structure is shown to the right).
4. In your own words, explain the purpose of...
what would you expect to observe if you performed the silver nitrate test on benzil and...
what would you expect to observe if you performed the silver nitrate test on benzil and benzoin? why?
Assignment: CO2 extraction of Eugenol 1. Which one of the following two compounds would you expect to have a higher sol...
Assignment: CO2 extraction of Eugenol 1. Which one of the following two compounds would you expect to have a higher solubility in liquid CO2. Explain your reasoning in a few sentences: HO. HC I CH ON CH3 Capsaicin Caffeine 2. Explain why percent recovery is utilized in the CO2 extraction of Eugenol as opposed to a theoretical yield. Limit yourself to 1-3 sentences. H3CO 3. List 3 signals that should be observed in the IR spectrum of Eugenol (whose structure...
Which one of the following aqueous solutions would you expect to have the largest conductance: (a)...
Which one of the following aqueous solutions would you expect to have the largest conductance: (a) 0.050 M NaCl, (b) 0.050 M Na2SO4, or (c) 0.050 M Na3PO4? Explain your reasoning.
1. a) Why does biphenyl have a higher Rf value than either benzophenone or triphenylmethanol? Exp...
1. a) Why does biphenyl have a higher Rf value than either benzophenone or triphenylmethanol? Explain based on the structures and their effect on mobility in the TLC process. b) Which compound, benzophenone or triphenylmethanol has a higher Rf value? Explain, based on their structures, how you can predict this. c) You developed your TLC using a 10% mixture of diethyl ether in petroleum ether. Petroleum ether is a mixture of non-polar alkanes, so this TLC solvent is composed of...
Post lab Exp 10: Preparation of benzil from benzoin Place 1 g of benzoin and 3...
Post lab
Exp 10: Preparation of benzil from benzoin Place 1 g of benzoin and 3 mL of concentrated nitric acid in a 50 mL beaker. Heat the mixture on a water bath for 15 minutes. At the end of this time, add 30 mL of cold water to the reaction mixture. Cooling the reaction mixture in ice-water bath will cause crystallization. Vacuum filter the product. Press the crystal gently with a clean glass stopper to remove as much of...
How would you expect the two compounds shown below to behave in the SN1 and SN2...
How would you expect the two compounds shown below to behave in
the SN1 and SN2 reactivity tests? Explain your reasoning.
Br CI
Which of the following compounds would you expect to have the lowest Rf value on a silica gel TLC plate developed with dichloromethane? O A. Naphthalene O B. Phenyl acetate OC Butyric acid QUESTION 3 Which of the following compounds would you expect to have the highest Rf value on a silica gel TLC plate developed with dichloromethane? O A 2-octanone O B. Acetic acid C. 1-butanol OD. decane E. acetaldehyde
9. Based on looking at your TLC plate taken during step 2 of Dilantin synthesis, answer the following questions (a) Which is more polar, benzoin or benzil? Circle Below. Benzoin Benzil (b) Now look at the structures of benzoin and benzil. Specifically explain why one of these compounds has a lower Rr value than the other. You must address structure in your answer. Explain in one or two sentences (c) How can you tell by TLC if your reaction went...
1. Which one of the following two compounds would you
expect to have a higher solubility in liquid CO2. Explain your
reasoning in a few sentences:
2. Explain why percent recovery is utilized in the CO2
extraction of Eugenol as opposed to a theoretical yield. Limit
yourself to 1-3 sentences.
3. List 3 signals that should be observed in the IR
spectrum of Eugenol (whose structure is shown to the right).
4. In your own words, explain the purpose of...
Assignment: CO2 extraction of Eugenol 1. Which one of the following two compounds would you expect to have a higher solubility in liquid CO2. Explain your reasoning in a few sentences: HO. HC I CH ON CH3 Capsaicin Caffeine 2. Explain why percent recovery is utilized in the CO2 extraction of Eugenol as opposed to a theoretical yield. Limit yourself to 1-3 sentences. H3CO 3. List 3 signals that should be observed in the IR spectrum of Eugenol (whose structure...
Post lab
Exp 10: Preparation of benzil from benzoin Place 1 g of benzoin and 3 mL of concentrated nitric acid in a 50 mL beaker. Heat the mixture on a water bath for 15 minutes. At the end of this time, add 30 mL of cold water to the reaction mixture. Cooling the reaction mixture in ice-water bath will cause crystallization. Vacuum filter the product. Press the crystal gently with a clean glass stopper to remove as much of...
How would you expect the two compounds shown below to behave in
the SN1 and SN2 reactivity tests? Explain your reasoning.
Br CI
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