Distance of a signal occurring at 2.0 ppm in hertz from the TMS signal in a 300 MHz spectrometer has to be determined. Concept introduction: The NMR spectrum of any compound is taken with reference to a standard compound called reference compound. Generally, tetramethylsilane (TMS) is taken as the reference compound. The methyl protons of TMS are equivalent and produces only one sharp peak at the rightmost end of the scale. The distance between the TMS signal and the signals produced by the compound is called the chemical shift. Chemical shift basically measures the shift in the signal position of the compound with respect to the reference signal. Chemical shift in delta scale is given as, chemical shift, δ ( ppm ) = distance from the TMS signal ( Hz ) operating frequency of the spectrometer (MHz)

Question

Want to see the full answer?

Answer 1

Question

Chapter 14.5, Problem 7P

(a)

Interpretation Introduction

Interpretation:

Distance of a signal occurring at 2.0 ppm in hertz from the TMS signal in a 300 MHz spectrometer has to be determined.

Concept introduction:

The NMR spectrum of any compound is taken with reference to a standard compound called reference compound. Generally, tetramethylsilane (TMS) is taken as the reference compound. The methyl protons of TMS are equivalent and produces only one sharp peak at the rightmost end of the scale.

The distance between the TMS signal and the signals produced by the compound is called the chemical shift. Chemical shift basically measures the shift in the signal position of the compound with respect to the reference signal.

Chemical shift in delta scale is given as,

chemical shift,δ(ppm)=distance from the TMS signal(Hz)operating frequency of the spectrometer (MHz)

(b)

Interpretation Introduction

Interpretation:

To determine the distance of a signal occurring at 2.0 ppm in hertz from the TMS signal.

Concept introduction:

The NMR spectrum of any compound is taken with reference to a standard compound called reference compound. Generally, tetramethylsilane (TMS) is taken as the reference compound. The methyl protons of TMS are equivalent and produces only one sharp peak at the rightmost end of the scale.

The distance between the TMS signal and the signals produced by the compound is called the chemical shift. Chemical shift basically measures the shift in the signal position of the compound with respect to the reference signal.

Chemical shift in delta scale is given as,

chemical shift,δ(ppm)=distance from the TMS signal(Hz)operating frequency of the spectrometer (MHz)

Expert Solution & Answer

Want to see the full answer?

Check out a sample textbook solution

See solution

Students have asked these similar questions

a. If two signals differ by 1.5 ppm in a 300 MHz spectrometer, by how much do they differ in a 500 MHz spectrometer? b. If two signals differ by 90 Hz in a 300 MHz spectrometer, by how much do they differ in a 500 MHz spectrometer?

14) The intensity of a signal in a ¹H NMR spectrum is determined by A. The number of neighboring C. Number of enantiotopic B. The electronic environment of D. Number of equivalent E. Number of non-equivalent protons.

A signal is seen at 600 Hz from the TMS signal in an NMR spectrometer with a 300-MHz operating frequency. a. What is the chemical shift of the signal? b. What is its chemical shift in an instrument operating at 500 MHz? c. How many hertz from the TMS signal is the signal in a 500-MHz spectrometer?