a) Explain the integration and predicted multiplicity for Ha. Does the observed multiplicity agree withyour prediction?b) Explain the integration and predicted multiplicity for Hb (assuming that JAB ‡ JBc). Does theobserved multiplicity agree with your prediction? What would the predicted multiplicity become ifJAB = Jac? Does the observed multiplicity agree with this prediction? Do you think that thecoupling constants (JAB & JBC) are nearly identical or quite different? 3. The H-NMR spectrum of 1-bromobutane is shown below. The spectrum shows signals at0.95 ppm, 1.45 ppm, 1.85 ppm and 3.45 ppm with relative integrations of approximately 3:2:2:2respectively. Given the following proton assignments for 1-bromobutane, fill in the table providedbelow.HdHd(note that for the signal centered at 1.45 ppm, the small outlying peak at 1.58 ppm should be ignored)HdHbHc10HcHaPBrHa2ProtonlabelabCdChemicalshift (ppm)Relativeintegration2Predictedmultiplicity23Observedmultiplicityppm

In 1H-NMR, the multiplicity of a peak is given by: (n+1) Here, n is the number of neighboring…

a) Explain the integration and predicted multiplicity for Ha. Does the observed multiplicity agree with your prediction? b) Explain the integration and predicted multiplicity for Hb (assuming that JAB JBC). Does the observed multiplicity agree with your prediction? What would the predicted multiplicity become if JAB = Jac? Does the observed multiplicity agree with this prediction? Do you think that the coupling constants (JAB & JBC) are nearly identical or quite different?

a) Explain the integration and predicted multiplicity for Ha. Does the observed multiplicity agree with your prediction? b) Explain the integration and predicted multiplicity for Hb (assuming that JAB JBC). Does the observed multiplicity agree with your prediction? What would the predicted multiplicity become if JAB = Jac? Does the observed multiplicity agree with this prediction? Do you think that the coupling constants (JAB & JBC) are nearly identical or quite different?

Chemistry

10th Edition

ISBN:9781305957404

Author:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste

Publisher:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste

Chapter1: Chemical Foundations

Section: Chapter Questions

Problem 1RQ: Define and explain the differences between the following terms. a. law and theory b. theory and...

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Question

a) Explain the integration and predicted multiplicity for Ha. Does the observed multiplicity agree with
your prediction?
b) Explain the integration and predicted multiplicity for Hb (assuming that JAB ‡ JBc). Does the
observed multiplicity agree with your prediction? What would the predicted multiplicity become if
JAB = Jac? Does the observed multiplicity agree with this prediction? Do you think that the
coupling constants (JAB & JBC) are nearly identical or quite different?

3. The H-NMR spectrum of 1-bromobutane is shown below. The spectrum shows signals at
0.95 ppm, 1.45 ppm, 1.85 ppm and 3.45 ppm with relative integrations of approximately 3:2:2:2
respectively. Given the following proton assignments for 1-bromobutane, fill in the table provided
below.
Hd
Hd
(note that for the signal centered at 1.45 ppm, the small outlying peak at 1.58 ppm should be ignored)
Hd
Hb
Hc
10
Hc
Ha
P
Br
Ha
2
Proton
label
a
b
C
d
Chemical
shift (ppm)
Relative
integration
2
Predicted
multiplicity
2
3
Observed
multiplicity
ppm

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