Answered: The optical rotation of pure…

The optical rotation of pure (S)-2-butanol is +4.097º. What is the percent composition (enantomeric excess) of a mixture of (S)-2-butanol and (R)-2-butanol with a specific rotation [α] = +2.048º?

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

Section3.7: Optical Activity—how Chirality Is Detected In The Laboratory

Problem 3.9P

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NMR Spectroscopy

NMR stands for Nuclear Magnetic Resonance in which the study of different molecules is done based on the interaction of radiofrequency electromagnetic radiations with the nuclei of molecules placed in a strong magnetic field. A precise study of spectra of visible light and all bands of electromagnetic radiation is called spectroscopy.

Question

The optical rotation of pure (S)-2-butanol is +4.097º. What is the percent composition (enantomeric excess) of a mixture of (S)-2-butanol and (R)-2-butanol with a specific rotation [α]= +2.048º?

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