Given: Tuluene has 24% ee of (s) product, 55% yield of product, 62% of s, and 38% r. The observed...
Given: Tuluene has 24% ee of (s) product, 55% yield of product, 62% of s, and 38% r.
The observed rotation for the product mixture is 18.7. What is the specific rotation of the S enantiomer?
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Given: Tuluene has 24% ee of (s) product, 55% yield of product, 62% of s, and 38% r. The observed...
3.34 The specific rotation of (S)-carvone (at +20°C) is +61. A chemist prepared a mixture of (R)- OF (R)- carvone a...
3.34 The specific rotation of (S)-carvone (at +20°C) is +61. A chemist prepared a mixture of (R)- OF (R)- carvone and its enantiomer, and this mixture had an observed rotation of -55°. (a) What is the specific rotation of (R)-carvone at 20°C? (b) Calculate the % ee of this mixture. (c) What percentage of the mixture is (S)-carvone?
A) If the observed rotation for the product mixture obtained from running the reaction in toluene...
A) If the observed rotation for the product mixture obtained from running the reaction in toluene is 18.7, what is the specific rotation of the S enantiomer? B) Based on your answer in part (a), predict what the observed rotation would be for a solution containing 0.250 g of this S-enantiomer dissolved in 10.0 mL of ethanol and placed in a sample cell with a length of 10.0 cm.
5.54 The specific rotation of (S)-carvone (at +20°C) is +61. A chemist prepared a mixture of...
5.54 The specific rotation of (S)-carvone (at +20°C) is +61. A chemist prepared a mixture of (R)- carvone and its enantiomer, and this mixture had an observed rotation of -55°. (a) What is the specific rotation of (R)-carvone at 20°C? (b) Calculate the % ee of this mixture. (c) What percentage of the mixture is (S)-carvone?
the R-(+) enantiomer of a certain compound has a specific rotation of +52. A mixture of...
the R-(+) enantiomer of a certain compound has a specific rotation of +52. A mixture of this compound with its enantiomer has a has an observed rotation of -26. what is the %ee of this sample and which enantiomer is in excess? what is the ration of R:S in this mixture?
1. Percent Enantiomerie Excess (ee) is given by the equation if in moless (The difference between Rand S isomers/su...
1. Percent Enantiomerie Excess (ee) is given by the equation if in moless (The difference between Rand S isomers/sum of R & S isomer) - 100. Thus, the sample prepared by Dr. Z. Evans in the PSB 340 Lab contained 12.8 moles of isomer and 3.2 moles of the S isomer. a. Which isomer is in excess in Dr. Evans product? 3.2 moles b. By how much: 12.8 - 3.2 x100 c. What is the percent ce? 2. Enantiomeric Excess...
21. Answer ALL parts of this question. The anti-inflammatory agent, (S)-naproxen sodium salt has a specific...
21. Answer ALL parts of this question. The anti-inflammatory agent, (S)-naproxen sodium salt has a specific rotation of +66º. The commercial preparation of the latter agent results in a mixture that has a 97% enantiomeric excess (ee). colo H3C0 (S)-naproxen sodium salt (a) Draw the R enantiomer of naproxen sodium salt. (1 mark) (b) What effect does the R enantiomer have on plane-polarized light? (1 mark) (c) What is the observed specific rotation of anti-inflammatory agent mixture? (4 marks) (d)...
If a pure R isomer has a specific rotation of –136.0°, and a sample contains 65.0%...
If a pure R isomer has a specific rotation of –136.0°, and a sample contains 65.0% of the R isomer and 35.0% of its enantiomer, what is the observed specific rotation of the mixture?
if a pure R isomer has a specific rotation of -106.0, and a sample contains 70.0%...
if a pure R isomer has a specific rotation of -106.0, and a sample contains 70.0% of the R isomer and 30.0% of it's enantiomer, what is the observed specific rotation of the mixture
If a pure R isomer has a specific rotation of – 106.0°, and a sample contains...
If a pure R isomer has a specific rotation of – 106.0°, and a sample contains 79.0% of the R isomer and 21.0% of its enantiomer, what is the observed specific rotation of the mixture? Number [a] = 10
Prelab Questions: 1. Calculate the observed specific rotation for the following molecule given the following informatio...
Prelab Questions: 1. Calculate the observed specific rotation for the following molecule given the following information: Observed rotation = +15.6 Path length = 1 dm Concentration = 0.5 g/mL (These calculation were performed at 25 °C using a Sodium “D” lamp) 2. A sample of chiral 2-butanol has a specific rotation of -3.25º. Determine the % ee and the molecular composition of this sample (% of one enantiomer and % of opposite enantiomer). The specific rotation of pure (-)-2-butanol is...
3.34 The specific rotation of (S)-carvone (at +20°C) is +61. A chemist prepared a mixture of (R)- OF (R)- carvone and its enantiomer, and this mixture had an observed rotation of -55°. (a) What is the specific rotation of (R)-carvone at 20°C? (b) Calculate the % ee of this mixture. (c) What percentage of the mixture is (S)-carvone?
5.54 The specific rotation of (S)-carvone (at +20°C) is +61. A chemist prepared a mixture of (R)- carvone and its enantiomer, and this mixture had an observed rotation of -55°. (a) What is the specific rotation of (R)-carvone at 20°C? (b) Calculate the % ee of this mixture. (c) What percentage of the mixture is (S)-carvone?
1. Percent Enantiomerie Excess (ee) is given by the equation if in moless (The difference between Rand S isomers/sum of R & S isomer) - 100. Thus, the sample prepared by Dr. Z. Evans in the PSB 340 Lab contained 12.8 moles of isomer and 3.2 moles of the S isomer. a. Which isomer is in excess in Dr. Evans product? 3.2 moles b. By how much: 12.8 - 3.2 x100 c. What is the percent ce? 2. Enantiomeric Excess...
21. Answer ALL parts of this question. The anti-inflammatory agent, (S)-naproxen sodium salt has a specific rotation of +66º. The commercial preparation of the latter agent results in a mixture that has a 97% enantiomeric excess (ee). colo H3C0 (S)-naproxen sodium salt (a) Draw the R enantiomer of naproxen sodium salt. (1 mark) (b) What effect does the R enantiomer have on plane-polarized light? (1 mark) (c) What is the observed specific rotation of anti-inflammatory agent mixture? (4 marks) (d)...
If a pure R isomer has a specific rotation of – 106.0°, and a sample contains 79.0% of the R isomer and 21.0% of its enantiomer, what is the observed specific rotation of the mixture? Number [a] = 10
Prelab Questions: 1. Calculate the observed specific rotation for the following molecule given the following information: Observed rotation = +15.6 Path length = 1 dm Concentration = 0.5 g/mL (These calculation were performed at 25 °C using a Sodium “D” lamp) 2. A sample of chiral 2-butanol has a specific rotation of -3.25º. Determine the % ee and the molecular composition of this sample (% of one enantiomer and % of opposite enantiomer). The specific rotation of pure (-)-2-butanol is...
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