The pure D-form of a compound has a specific rotation (D line of sodium, 20° C) of +24°, whereas the pure L- form of the compound has a specific rotation (D line of sodium, 20° C) of -24° If a scientist has a sample of this compound that is known to be 78% pure D-form (and, therefore, 100% - 78% pure L-form), what will be the observed rotation of this sample? Enter your answer to the nearest hundredth. The units are assumed to be degrees. 13.44

The pure D-form of a compound has a specific rotation (D line of sodium, 20° C) of +24°, whereas the pure L- form of the compound has a specific rotation (D line of sodium, 20° C) of -24° If a scientist has a sample of this compound that is known to be 78% pure D-form (and, therefore, 100% - 78% pure L-form), what will be the observed rotation of this sample? Enter your answer to the nearest hundredth. The units are assumed to be degrees. 13.44

Organic Chemistry

8th Edition

ISBN:9781305580350

Author:William H. Brown, Brent L. Iverson, Eric Anslyn, Christopher S. Foote

Publisher:William H. Brown, Brent L. Iverson, Eric Anslyn, Christopher S. Foote

Chapter3: Stereoisomerism And Chirality

Section: Chapter Questions

Problem 3.35P

See similar textbooks

Similar questions

Consider a solution that contains 74.0% R isomer and 26.0% S isomer. If the observed specific rotation of the mixture is -45.0°, what is the specific rotation of the pure R isomer? [a] =
The specific rotation of quinine, an anti-malarial drug, is -165°. How much quinine (in %) is present in a sample that has an observed specific rotation of 33°? CH3O HO H H quinine (antimalarial drug)
The specific rotation, [a]p, for (-)-malic acid is -27. What is the observed rotation for a solution of 0.75 g of (-)-malic acid in 10 mL of water in a sample tube having a pathlength of 10 cm? degrees. The observed rotation of a solution of 1.4 g of a compound in 10 mL of water is +1.3 degrees. If the pathlength is 10 cm, what is the specific rotation of the compound? 9 more group attempts remaining Submit Answer Retry Entire Group
Prectice q #12 The specific rotation of the pure (S) form of effluvium is -25.0°. Efflivium is an expensive component of a popular natural health product called Snake Oil. To save money, the ACME drug company make Snake Oil by mixing inexpensive racemic effluvium with some enantiomerically pure effluvium. The resulting drug gives a specific rotation of+16° a) What is the enantiomeric excess of the sample? b) Which isomer is in excess and why? c) What is the composition of the mixture (how much R form and how much S form)? d) What was the original ratio used of racemic effluvium to enantiomerically pure effluvium?
If the sample of the pure R enantiomer of a molecule has a specific rotation of -40 degrees and your mixture of that molecule has an 82% ee S, what is the observed specific rotation of your sample?
Provide an appropriate word which may be used to describe a compound with a specific rotation of (a) + 22.5° and (b) -22.5°.
If (S)-glyceraldehyde has a specific rotation of -8.7 what is the specific rotation of (R)- glyceraldehyde? O A) -8.7° O B) 0.0° OC) +8.7° O D) cannot be determined from the information given
Glutamic acid is a naturally occurring amino acid and isthe precursor to the food additive MSG (monosodium glutamate)which can cause allergic reactions in some people. If naturally occurring L glutamic acid has a melting point of 205 C and an optical rotation of + 31.5, what is the melting point and optical rotation of its enantiomer?
The specific rotation for compound D is -8.5° dm 1(g/mL)-1, what is the specific rotation of compound E under the same conditions? [a] = -8.5° dm-1 (g/mL)-1 OH O он О он ОН D E -8.5° dm-1 (g/mL)-1 +8.5° dm-1 (g/mL)-1 0° dm-1 (g/mL)-1 not enough information is provided to determine a value
(S)-(+)-Monosodium glutamate (MSG) is a flavor enhancer used in many foods. Some people have an allergic reaction to MSG (including headache, chest pain, and an overall feeling of weakness). Fast food often contains substantial amounts of MSG, which is widely used in Chinese food as well. (S)-(+)-MSG has a specific rotation of +24.a. What is the specific rotation of (R)-(-)-monosodium glutamate? b. What is the specific rotation of a racemic mixture of MSG?
The specific rotation, [a]p, for (-)-malic acid is -27. What is the observed rotation for a solution of 1.2 g of (-)-malic acid in 10 mL of water in a sample tube having a pathlength of 10 cm? | degrees. The observed rotation of a solution of 1.2 g of a compound in 10 mL of water is +0.75 degrees. If the pathlength is 10 cm, what is the specific rotation of the compound? 9 more group attempts remaining Submit Answer Retry Entire Group
Glutamic acid is a naturally occurring amino acid and is the precursor to the food additive MSG (monosodium glutamate) which can cause allergic reactions in some people. If naturally occurring L glutamic acid has a melting point of 205 C and an optical rotation of + 31.5, what is the melting point and optical rotation of its enantiomer?