Homework Answers
Compound (2) is a carbonyl compound and which is having less polarity compared to the alcoholic compound (1).
So; Compound (2) have greater Rf.
Most polar compound have strong interactions with polar stationary phase silica and which moves less distance over TLC and in result, polar compound (1) shows lower Rf.
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3) Consider the compounds trans-4-tert-butylcyclohexanol (1) and 4-tert-butylcyclohexanone (2) below. Using silica gel...
1-) Silica gel has a bulk density of about 0.3 g/cm3, so 15 g would occupy...
1-) Silica gel has a bulk density of about 0.3 g/cm3, so 15 g would occupy a volume of 45-50 cm3 (45-50 mL). This quantity is called the: 2-) You are carrying out a chromatographic separation on a 15 mg sample using 6.5 g of silica gel in your column. If you aim for a column height of 10 cm of silica gel, what is the inside diameter of the necessary chromatography column in units of cm? 3-) Consider the...
kindly answer the following thank you! 3. Since the surface of the silica gel on a...
kindly answer the following thank you!
3. Since the surface of the silica gel on a silica gel TLC plate is covered in SI-O-H groups, organic molecules that can hydrogen bond will be much more attracted to the silica gel surface. Given that which of the following compounds would have the lowest Rf value if each of these was analyzed using a slica gel TLC plate and dichloromethane as a solvent? OH 4. Determine the Rf values for the two...
4. Consider the following silica gel TLC plac or compounds A, B, and hexines: developed in...
4. Consider the following silica gel TLC plac or compounds A, B, and hexines: developed in Fo-o- og a) Determine the Rr values of compounds A, B, and C run on a silica gel TLC plate using hexanes as the solvent b) Which compound, A, B, or C. is the most polar? values if you used acetone instead c) What would you expect to happen to the of hexanes as the eluting solvent? 5) Consider a sample that is a...
Please help 2. Consider the TLC plate shown below that was done on silica gel using...
Please help
2. Consider the TLC plate shown below that was done on silica gel using a solvent mixture of 4:1 hexane/EtoAc as the eluent. 4:1 Hexane:EtOAC marked solvent front Spot B Spot A A origin (a) Which of the two organic compounds labeled A and B is less polar? (b) Calculate the Rf value of compound B. (c) How would the following changes affect the Rf values of A and B? i. Change to a more polar solvent mixture...
TLC Consider the following silica gel TLC plate of compounds A, B, and developed in hexanes:...
TLC Consider the following silica gel TLC plate of compounds A, B, and developed in hexanes: solvent front 0 D origin A B C 22. Determine the Ry values of compounds A, B, and Crun on a silica gel TLC plate using hexanes as the solvent. 23. Which compound, A, B, or C, is the most polar? 24. What would you expect to happen to the Ry values if you used acetone instead of hexanes as the eluting solvent? 25.TLC...
sodium borohydide reduction of 4 tert butylcyclohexanone. need help confirming top answers are correct and help...
sodium borohydide reduction of 4 tert
butylcyclohexanone. need help confirming top answers are correct
and help with lower section. thanks
& Draw your two products (each in the most stable chair conformation) below using the numbering provided. Show only the -OH and tert-butyl groups on the ring. a) label each group as equatorial (eq) or axial (ax). b) label each group as top face (top) or bottom face (bot). OH (ax, top) (ax, bot) .OH (Eq, top 7 (Er, top...
2) During silica gel TLC analysis, when 2-propanol was used as a developing solvent, two substances...
2) During silica gel TLC analysis, when 2-propanol was used as a developing solvent, two substances moved with the solvent front (Rf = 1.0). Can you conclude that the substances are identical? If not, what additional experiment(s) would you perform? (5 pts).
6. Silica gel was used as the solid support for the TLC plate. Which of the...
6. Silica gel was used as the solid support for the TLC plate.
Which of the three compounds (A, B, or C) in the APPLIED MIXTURE is
the least polar? (See the figure attached.)
8. Which compound below will have the highest Rf on a TLC
plate? Explain your reasoning. (See figure attached.)
10. The following TLC plates have been spotted with two
different compounds and are about to be eluted. For each plate,
explain if it has been spotted...
1. A mixture containing Compound X and Compound Y is analyzed using silica gel TLC. a....
1. A mixture containing Compound X and Compound Y is analyzed using silica gel TLC. a. If Compound X has an Rf value of 0.7 and Compound Y has an Rvalue of 0.3, which compound is more polar? Explain. b. The solvent traveled 50 mm. How far did Compound Y travel? 2. Why isn't it reasonable for an R. value to be greater than 1? 3. How many spots would you expect to see if you conducted a TLC separation...
Why does 4-bromonitrobenzene have a larger ? value than 2-bromonitrobenzene in silica gel TLC? R
Why does 4-bromonitrobenzene have a larger
? value than 2-bromonitrobenzene in silica gel TLC?
R
kindly answer the following thank you!
3. Since the surface of the silica gel on a silica gel TLC plate is covered in SI-O-H groups, organic molecules that can hydrogen bond will be much more attracted to the silica gel surface. Given that which of the following compounds would have the lowest Rf value if each of these was analyzed using a slica gel TLC plate and dichloromethane as a solvent? OH 4. Determine the Rf values for the two...
4. Consider the following silica gel TLC plac or compounds A, B, and hexines: developed in Fo-o- og a) Determine the Rr values of compounds A, B, and C run on a silica gel TLC plate using hexanes as the solvent b) Which compound, A, B, or C. is the most polar? values if you used acetone instead c) What would you expect to happen to the of hexanes as the eluting solvent? 5) Consider a sample that is a...
Please help
2. Consider the TLC plate shown below that was done on silica gel using a solvent mixture of 4:1 hexane/EtoAc as the eluent. 4:1 Hexane:EtOAC marked solvent front Spot B Spot A A origin (a) Which of the two organic compounds labeled A and B is less polar? (b) Calculate the Rf value of compound B. (c) How would the following changes affect the Rf values of A and B? i. Change to a more polar solvent mixture...
TLC Consider the following silica gel TLC plate of compounds A, B, and developed in hexanes: solvent front 0 D origin A B C 22. Determine the Ry values of compounds A, B, and Crun on a silica gel TLC plate using hexanes as the solvent. 23. Which compound, A, B, or C, is the most polar? 24. What would you expect to happen to the Ry values if you used acetone instead of hexanes as the eluting solvent? 25.TLC...
sodium borohydide reduction of 4 tert
butylcyclohexanone. need help confirming top answers are correct
and help with lower section. thanks
& Draw your two products (each in the most stable chair conformation) below using the numbering provided. Show only the -OH and tert-butyl groups on the ring. a) label each group as equatorial (eq) or axial (ax). b) label each group as top face (top) or bottom face (bot). OH (ax, top) (ax, bot) .OH (Eq, top 7 (Er, top...
2) During silica gel TLC analysis, when 2-propanol was used as a developing solvent, two substances moved with the solvent front (Rf = 1.0). Can you conclude that the substances are identical? If not, what additional experiment(s) would you perform? (5 pts).
6. Silica gel was used as the solid support for the TLC plate.
Which of the three compounds (A, B, or C) in the APPLIED MIXTURE is
the least polar? (See the figure attached.)
8. Which compound below will have the highest Rf on a TLC
plate? Explain your reasoning. (See figure attached.)
10. The following TLC plates have been spotted with two
different compounds and are about to be eluted. For each plate,
explain if it has been spotted...
1. A mixture containing Compound X and Compound Y is analyzed using silica gel TLC. a. If Compound X has an Rf value of 0.7 and Compound Y has an Rvalue of 0.3, which compound is more polar? Explain. b. The solvent traveled 50 mm. How far did Compound Y travel? 2. Why isn't it reasonable for an R. value to be greater than 1? 3. How many spots would you expect to see if you conducted a TLC separation...
Why does 4-bromonitrobenzene have a larger
? value than 2-bromonitrobenzene in silica gel TLC?
R
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