Homework Answers
The -OH group of silica can form hydrogen bonds with the =O and -OH group of benzoin.
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TLC separates compounds via non-covalent interactions between the compound and the silica on the plate. In...
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...
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...
Question 9 1 pts Considering the silica gel TLC plate shown, which compound is the most...
Question 9 1 pts Considering the silica gel TLC plate shown, which compound is the most polar (the solvent front is at 4.0 cm)? Spot Distance traveled (cm) A 0.50 В 2.0 IC 3.0 D 1.0 O Compound B (spot B) Compound A (spot A) O Compound D (spot D) O Compound C (spot C)
2. A silica gel TLC plate developed with 5% acetic acid in ethyl acetate is depicted...
2. A silica gel TLC plate developed with 5% acetic acid in ethyl acetate is depicted below. Each spot on the plate corresponds to one of the compounds given on the right. Match each spot with a compound. ТСН, H.CO nambumetone ОН a) A=nambutone B= tolmetin C =phenacetin b) A=nambutone B=phenacetin C = tolmetin c) A=phenacetin B= tolmetin C = nambutone A= tolmetin B=phenacetin C = nambutone e) A=phenacetin B=nambutone C = tolmetin tolmetin phenacetin
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...
Refer to the four compounds below for question 5-7: CH3 will have intermolecular hydrogen bonding. 5) 6) is the most nonpolar compound in the group. 7) will have the lowest Rf value on a silica-...
Refer to the four compounds below for question 5-7: CH3 will have intermolecular hydrogen bonding. 5) 6) is the most nonpolar compound in the group. 7) will have the lowest Rf value on a silica-gel TLC plate. 17) In the distillation setup shown, the water in the condenser (5) should flow 0 161 A) in through [7) and out through [9] C) in through [9] and out through [7] B) in through [61 and out through [7] D) it is...
1. A TLC experiment is performed to separate a mixture of the compounds shown below. 5.2...
1. A TLC experiment is performed to separate a mixture of the compounds shown below. 5.2 cm 4.8 cm • C 0-H O-H 2.3 cm • B OCH3 Phenol Cyclohexadiene m-anisic acid 1.1 cm • A a) Draw dipole arrows / dipole moments present for each molecule (if they have any) (2 points) b) The experiment yielded the TLC plate given on the left. Match each spot to one of the three molecules. For each compound, explain what makes it...
Questions 1 and 2. 1. (6 pts) Draw the following interactions between the given amino acid...
Questions 1 and 2.
1. (6 pts) Draw the following interactions between the given amino acid side chains. a. Salt bridge between lysine and aspartic acid b. Hydrogen bond between serine and tyrosine c. Hydrophobic interaction between valine and phenylalanine I 2. (7 pts) For the following nucleotide, NH O=P-07 6-1-0 OHOH a. Label the three main components. b. If this DNA or RNA? C. What nucleutide is is this?
Choose the strongest non-covalent interaction that exists between the following pairs of compounds. Ion-Ion Ion-Dipole...
Choose the strongest non-covalent interaction that exists between the following pairs of compounds. Ion-Ion Ion-Dipole Dipole-Dipole Dipole-Induced Dipole Induced Dipole-Induced Dipole Cs+ and PF6- Tries 0/5 Ion-Ion Ion-Dipole Dipole-Dipole Dipole-Induced Dipole Induced Dipole-Induced Dipole Cs+ and CHCl3 Tries 0/5 Ion-Ion Ion-Dipole Dipole-Dipole Dipole-Induced Dipole Induced Dipole-Induced Dipole CH3OH and CH4 Tries 0/5 Ion-Ion Ion-Dipole Dipole-Dipole Dipole-Induced Dipole Induced Dipole-Induced Dipole NO3- and HCN Tries 0/1 Ion-Ion Ion-Dipole Dipole-Dipole Dipole-Induced Dipole Induced Dipole-Induced Dipole Ca2+ and F-
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?...
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...
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...
Question 9 1 pts Considering the silica gel TLC plate shown, which compound is the most polar (the solvent front is at 4.0 cm)? Spot Distance traveled (cm) A 0.50 В 2.0 IC 3.0 D 1.0 O Compound B (spot B) Compound A (spot A) O Compound D (spot D) O Compound C (spot C)
2. A silica gel TLC plate developed with 5% acetic acid in ethyl acetate is depicted below. Each spot on the plate corresponds to one of the compounds given on the right. Match each spot with a compound. ТСН, H.CO nambumetone ОН a) A=nambutone B= tolmetin C =phenacetin b) A=nambutone B=phenacetin C = tolmetin c) A=phenacetin B= tolmetin C = nambutone A= tolmetin B=phenacetin C = nambutone e) A=phenacetin B=nambutone C = tolmetin tolmetin phenacetin
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...
Refer to the four compounds below for question 5-7: CH3 will have intermolecular hydrogen bonding. 5) 6) is the most nonpolar compound in the group. 7) will have the lowest Rf value on a silica-gel TLC plate. 17) In the distillation setup shown, the water in the condenser (5) should flow 0 161 A) in through [7) and out through [9] C) in through [9] and out through [7] B) in through [61 and out through [7] D) it is...
1. A TLC experiment is performed to separate a mixture of the compounds shown below. 5.2 cm 4.8 cm • C 0-H O-H 2.3 cm • B OCH3 Phenol Cyclohexadiene m-anisic acid 1.1 cm • A a) Draw dipole arrows / dipole moments present for each molecule (if they have any) (2 points) b) The experiment yielded the TLC plate given on the left. Match each spot to one of the three molecules. For each compound, explain what makes it...
Questions 1 and 2.
1. (6 pts) Draw the following interactions between the given amino acid side chains. a. Salt bridge between lysine and aspartic acid b. Hydrogen bond between serine and tyrosine c. Hydrophobic interaction between valine and phenylalanine I 2. (7 pts) For the following nucleotide, NH O=P-07 6-1-0 OHOH a. Label the three main components. b. If this DNA or RNA? C. What nucleutide is is this?
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?...
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