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15. Analytical Techniques:IR, NMR, Mass Spect

NMR Practice

15. Analytical Techniques:IR, NMR, Mass Spect

NMR Practice

Practice this topic

Open Question
Draw the approximate positions that the following compound might show in its 1H NMR absorptions?
Open Question
Draw the approximate positions that the following compound might show in its 1H NMR absorptions?
Multiple Choice
A ¹H NMR spectrum has a singlet at 4.1 ppm with an integration of 2H. How many hydrogen atoms are on the neighboring carbon atom?
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?
Multiple Choice
Which of the following structures would give the following ¹H NMR spectrum?0.93 ppm (s, 9H), 2.13 ppm (d, 2H), 9.85 ppm (t, 1H)
Textbook Question
Draw the expected NMR spectrum of methyl propionate, and point out how it differs from the spectrum of ethyl acetate.
Textbook Question
Each of these four structures has molecular formula C₄H₈O₂. Match the structure with its characteristic proton NMR signals. (Not all of the signals are listed in each case.)
(a) sharp 1H singlet at δ8.0 and 2H triplet at δ4.0
(b) sharp 3H singlet at δ2.0 and 2H quartet at δ4.1
(c) sharp 3H singlet at δ3.7 and 2H quartet at δ2.3
(d) broad 1H singlet at δ11.5 and 2H triplet at δ2.3

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