Using a 60 MHz spectrometer, a chemist observes the following peak: doublet, J = 7 Hz, at 4.00 ppm What would be the coupling constant of this peak (in Hz) as measured by a 300 MHz spectrometer? INCLUDE UNITS!

Using a 60 MHz spectrometer, a chemist observes the following peak: doublet, J = 7 Hz, at 4.00 ppm What would be the coupling constant of this peak (in Hz) as measured by a 300 MHz spectrometer? INCLUDE UNITS!

Principles of Instrumental Analysis

7th Edition

ISBN:9781305577213

Author:Douglas A. Skoog, F. James Holler, Stanley R. Crouch

Publisher:Douglas A. Skoog, F. James Holler, Stanley R. Crouch

Chapter19: Nuclear Magnetic Resonance Spectroscopy

Section: Chapter Questions

Problem 19.20QAP

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Spectroanalytical Methods

Spectroanalytical methods measure the wavelength and intensity of radiations that are either emitted or absorbed by a molecular or atomic species. These methods are useful for evaluating the electronic or atomic arrangement of the molecules of a given analyte.

Question

Using a 60 MHz spectrometer, a chemist observes the following peak:

doublet, J = 7 Hz, at 4.00 ppm

What would be the coupling constant of this peak (in Hz) as measured by a 300 MHz spectrometer? INCLUDE UNITS!

Expert Solution

Step 1

Given:

At 60MHz,

Peak is doublet.

Coupling constant J = 7Hz

Chemical shift = 4.00 ppm

To find:

Coupling constant J at 300 MHz is ?

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