The specific rotation of (R)-(-)-monosodium has to be calculated. Concept introduction: The pair of Enantiomers has different configurations. Pair of enantiomers has different optical activity, which means if one will show levorotatory then the other will show dextrorotatory. The direction and magnitude of rotation of plane-polarized light by an optically compound is measured by using polarimeter . This rotation of polarized light is specific for a compound at specified temperature and wavelength, so it is called as Specific rotation of that compound. The specific rotation of enantiomers has equal magnitudes and opposite signs. Racemic mixture (equal amounts of enantiomers) of a compound has zero specific rotation.

Question

Want to see the full answer?

Answer 1

Question

Chapter 4.9, Problem 29P

(a)

Interpretation Introduction

Interpretation:

The specific rotation of (R)-(-)-monosodium has to be calculated.

Concept introduction:

The pair of Enantiomers has different configurations.

Pair of enantiomers has different optical activity, which means if one will show levorotatory then the other will show dextrorotatory.

The direction and magnitude of rotation of plane-polarized light by an optically compound is measured by using polarimeter.

This rotation of polarized light is specific for a compound at specified temperature and wavelength, so it is called as Specific rotation of that compound.

The specific rotation of enantiomers has equal magnitudes and opposite signs.

Racemic mixture (equal amounts of enantiomers) of a compound has zero specific rotation.

(b)

Interpretation Introduction

Interpretation:

The specific rotation of racemic mixture of monosodium glutamate has to be calculated.

Concept introduction:

The pair of Enantiomers has different configurations.

Pair of enantiomers has different optical activity, which means if one will show levorotatory then the other will show dextrorotatory.

The direction and magnitude of rotation of plane-polarized light by an optically compound is measured by using polarimeter.

This rotation of polarized light is specific for a compound at specified temperature and wavelength, so it is called as Specific rotation of that compound.

The specific rotation of enantiomers has equal magnitudes and opposite signs.

Racemic mixture (equal amounts of enantiomers) of a compound has zero specific rotation.

Expert Solution & Answer

Want to see the full answer?

Check out a sample textbook solution

See solution

Students have asked these similar questions

(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 of the pure (S) form of Ivermectin is +85.0° when measured using light with a 500 nm wavelength. Ivermectin is an expensive component of a popular COVID treatment called NO-FX. To save money, the Trumpharm company makes NO-FX by mixing inexpensive racemic Ivermectin with some enantiomerically pure Ivermectin. A 1.3 g sample of NO-FX is dissolved in 6.0 mL of CHCl3. When placed in a 1 cm cell, the observed rotation at 500 nm is -0.6°. a) What is the specific rotation of the sample? b) Which isomer is in excess and how do you know it is in excess? c) What is the optical purity of the sample?

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)