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NMR Practice Problems
Spring 2014
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Problemas de espectroscopia RMN, Exercícios de Química Orgânica
Exercícios universitários sobre espectroscopia de ressonância magnética nuclear
Tipologia: Exercícios
2019
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NMR Practice Problems
Spring 2014
Fall 2007
- Compound W has an empirical formula of C 10 H 13 NO 2. Given are the following spectra.
a. Determine the degree of unsaturation for the compound.
b. Assign five pertinent peaks in the IR spectrum.
c. Suggest a structure for compound W based on the spectra given. Show all your work and clearly indicate what your final answer is.
Integration 2 2 2 2 2 3 Multiplet d d t s “m” t
Winter 2008
- Compound W has an empirical formula of C 10 H 11 NO 4. Given are the following spectra.
a. Determine the degree of unsaturation for the compound.
b. Assign the five pertinent peaks in the IR spectrum.
c. Suggest a structure for compound W based on the spectra given. Show all your work and clearly indicate what your final answer is.
Integration 2 2 2 2 3
DEPT 135
DEPT 90
DEPT 45
of attached
hydrogens
DEPT 135 0 up down up DEPT 90 0 up 0 0 DEPT 45 0 up up up
Final Answer
DEPT 135
DEPT 90
DEPT 45
Note: The signal group at 128 ppm is comprised of two tall and one medium sized signal.
of attached
hydrogens
DEPT 135 0 up down up DEPT 90 0 up 0 0 DEPT 45 0 up up up
Final Answer
Summer 2008
- Compound W has an empirical formula of C 18 H 18 O 4. Given are the following spectra. Show all your work.
a. Determine the degree of unsaturation for the compound.
b. Assign the five pertinent peaks in the IR spectrum.
c. Suggest a structure for compound W based on the spectra given. Place your final answer in the box provided below. Only a molecule placed is this box will receive credit!
Integration 5 2 2
Fall 2008
- Compound W has an empirical formula of C 10 H 12 O 3. Given are the following spectra. Show all your work.
a. Determine the degree of unsaturation for the compound.
b. Assign the five pertinent peaks in the IR spectrum.
c. Suggest a structure for compound W based on the spectra given. Place your final answer in the box provided below. Only a molecule placed is this box will receive credit!
Integration 5 1 2 1 3
DEPT 135
DEPT 90
DEPT 45
Note: The signal group at 128 ppm is comprised of one tall and one medium sized signal (see DEPT).
of attached
hydrogens
DEPT 135 0 up down up DEPT 90 0 up 0 0 DEPT 45 0 up up up
Final Answer
DEPT 135
DEPT 90
DEPT 45
of attached
hydrogens
DEPT 135 0 up down up DEPT 90 0 up 0 0 DEPT 45 0 up up up
Final Answer
Summer 2009
- Compound W has an empirical formula of C 10 H 12 O 3. Given are the following spectra. Show all your work (= label peaks in the spectra!)
a. Determine the degree of unsaturation for the compound.
b. Assign the five pertinent peaks in the IR spectrum.
c. Suggest a structure for compound W based on the spectra given. Place your final answer in the box provided below. Only the molecule placed is this box will receive credit! Partial structures and structures which do not meet the molecular formula, will not any receive credit.
Integration 2 2 2 3 3
Fall 2009
- Compound W has an empirical formula of C 11 H 14 O 2. Given are the following spectra. Show all your work (= label peaks in the spectra!)
a. Determine the degree of unsaturation for the compound.
b. Assign the five pertinent peaks in the IR spectrum.
c. Suggest a structure for compound W based on the spectra given. Place your final answer in the box provided below. Only the molecule placed is this box will receive credit! Partial structures and structures which do not meet the molecular formula, will not any receive credit.
Integration 4 2 2 3 3 Multiplet d/d/t/t
DEPT 135
DEPT 90
DEPT 45
of attached
hydrogens
DEPT 135 0 up down up DEPT 90 0 up 0 0 DEPT 45 0 up up up
Final Answer
DEPT 135
DEPT 90
DEPT 45
of attached
hydrogens
DEPT 135 0 up down up DEPT 90 0 up 0 0 DEPT 45 0 up up up
Final Answer
Spring 2010
- Compound W has an empirical formula of C 10 H 14 O. Given are the following spectra. Show all your work (= label peaks in the spectra!)
a. Determine the degree of unsaturation for the compound.
b. Assign the five pertinent peaks in the IR spectrum.
c. Suggest a structure for compound W based on the spectra given. Place your final answer in the box provided below. Only the molecule placed is this box will receive credit! Partial structures and structures which do not meet the molecular formula, will not any receive credit.
Integration 5 2 1 1 2 3