The specific rotation of the compound 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. Specific rotation of compound is calculated by, [ α ] λ T = α l ( d m ) × c ( g / 100 m L ) [ α ] λ T − s p e c i f i c r o t a t i o n ( a t T a n d λ ) α − o b s e r v e d r o t a t i o n c − c o n c e n t r a t i o n o f t h e s a m p l e l − l e n g t h o f t h e s a m p l e t u b e

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Chapter 4.9, Problem 21P

Interpretation Introduction

Interpretation:

The specific rotation of the compound 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.

Specific rotation of compound is calculated by,

[α]λT=αl ( dm)×c (g/100mL) [α]λT−specific rotation (at T and λ)α−observed rotationc−concentration of the samplel−length of the sample tube

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