Splitting of a signal in a proton NMR spectrum tells us the number of chemically non-equivalent hydrogens in the immediate vicinity of the hydrogen giving the signal. Predict the number of lines exhibited by hydrogens at the labeled positions in a first-order NMR spectrum. (Make the approximation that all coupling constants are equal.) 1) The number of lines exhibited by hydrogen(s) a is I The number of lines exhibited by hydrogen(s) b is The number of lines exhibited by hydrogen(s) c is 2) HO The number of lines exhibited by hydrogen(s) a is The number of lines exhibited by hydrogen(s) b is The number of lines exhibited by hydrogen(s) c is Submit Answer Retry Entire Group 5 more group attempts remaining

Splitting of a signal in a proton NMR spectrum tells us the number of chemically non-equivalent hydrogens in the immediate vicinity of the hydrogen giving the signal. Predict the number of lines exhibited by hydrogens at the labeled positions in a first-order NMR spectrum. (Make the approximation that all coupling constants are equal.) 1) The number of lines exhibited by hydrogen(s) a is I The number of lines exhibited by hydrogen(s) b is The number of lines exhibited by hydrogen(s) c is 2) HO The number of lines exhibited by hydrogen(s) a is The number of lines exhibited by hydrogen(s) b is The number of lines exhibited by hydrogen(s) c is Submit Answer Retry Entire Group 5 more group attempts remaining

Physical Chemistry

2nd Edition

ISBN:9781133958437

Author:Ball, David W. (david Warren), BAER, Tomas

Publisher:Ball, David W. (david Warren), BAER, Tomas

Chapter16: Introduction To Magnetic Spectroscopy

Section: Chapter Questions

Problem 16.46E: a The structure of 2 chloroethanol is usually staggered, as shown in this Newman projection: How...

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a The structure of 2 chloroethanol is usually staggered, as shown in this Newman projection: How many distinct 1HNMR signals would you expect from this molecule? Assume that the OH bond is pointing away from the CC bond. b In some circumstances, 2 chloroethanol can be frozen in an eclipsed structure, whose Newman projection looks like this: How many distinct 1HNMR signals would you expect from this molecule?
True or False: The chemical shift of a particular proton provides information about the electronic/chemical environment of that proton. Could you explain how to do this in detail?
Decreasing order of chemical shift of H?
Determine the structure of this compund K, and label which hydrogens refer to which chemical shifts.
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Briefly, but informatively, describe the differences in the spectra generated by the following; i) Electron ionisation ii) Field ionisation iii) Chemical ionisation
Using the following NMR spectrum please identify what molecules are present along with their chemical shifts and their multiplicity.
(How do the signals for methyl fluoride look like in the proton and the carbon NMR Spectrum?) the splitting caused by atoms other than carbon and hydrogen atoms Predict the number of lines observed in the proton spectrum. Predict the number of lines observed in the carbon spectrum. Justify your answer for the proton spectrum. Justify your answer for the carbon spectrum.
Predict the approximate chemical shifts of the protons in the following compounds. (a) benzene (b) cyclohexane
Why is this the correct spectra for these molecules? Identify specific absorption band which identifies each characteristic functional group of the molecule chosen.
In very high resolution spectra of HCl, each one of the narrow lines observed is split into two lines: one about one third the height of the neighbor (you may be able to just see this effect in your data). Suggest a possible origin for the splitting of these lines.
(How do the signals for methyl fluoride look like in the proton and the carbon NMR Spectrum?) Predict the number of lines observed in the proton spectrum. Predict the number of lines observed in the carbon spectrum. Justify your answer for the proton spectrum. Justify your answer for the carbon spectrum.