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15. Analytical Techniques:IR, NMR, Mass Spect

NMR Practice

15. Analytical Techniques:IR, NMR, Mass Spect

NMR Practice

Multiple Choice
A ¹H NMR spectrum contains a quartet at 4.1 ppm integrating to 2H and triplet at 0.9 ppm integrating to 3H, among other signals. What fragment is likely part of this molecule?
Textbook Question
Draw the NMR spectra you expect for the following compounds.
(a)
Textbook Question
Given the ¹H NMR spectrum and the molecular formula, suggest a structure for each molecule. [The IR spectrum suggests the presence of two C=O bonds.]
(a) Important IR bands (cm ⁻ ¹) : 1728, 1708 [Note: The pKₐ of this molecule is around 10.]
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Textbook Question
The following NMR spectra correspond to compound of formula (A) C₉H₁₀O₂. Propose structure, and show how it is consistent with the observed absorptions.
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Textbook Question
Draw the NMR spectra you expect for the following compounds.
(b)