Homework Answers
The above hydrogens can be matched to their signals as follows:
- H1: F(6H,doublet)
- H2: C(1H,septet)
- H3: E(6H,singlet)
- H4: D(2H,singlet)
- H5: A(4H,multi)
- H6: B(3H,singlet)
The peak multiplicity =n +1 where n is the number of hydrogens on the adjacent carbon.
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Match the hydrogens in the structure below to each signal in the NMR spectrum H1 H5...
H NMR: 7.0d (4H, broad singlet); 2.85 o (1H, septet); 2.28 (3H, singlet); 1.20 0(6H doublet) R: 8...
H NMR: 7.0d (4H, broad singlet); 2.85 o (1H, septet); 2.28 (3H, singlet); 1.20 0(6H doublet) R: 825 cm What is the structure of a hydrocarbon that shows a molecular ion at m/z- 182 in the mass spectrum and has the following 1H NMR spectrum? 7.20, singlet, 5H- 2.9 d, singlet, 2H
H NMR: 7.0d (4H, broad singlet); 2.85 o (1H, septet); 2.28 (3H, singlet); 1.20 0(6H doublet) R: 825 cm What is the structure of a hydrocarbon that shows...
For the protons labeled Ha and Hb in the structure below, predict the characteristics of their...
For the protons labeled Ha and Hb in the structure below, predict the characteristics of their signals in the H NMR spectrum: the approximate chemical shift, the splitting pattern, and the integration value of their signals. Approximate Integration Splitting chemical shift value O 1H H NMR signal O 1 ppm O singlet for H O doublet O 2H 2 ppm O 3H O 3-4 ppm O triplet Br O 4H O 5-6 ppm O quartet O 5H O 7-8 ppm...
For the protons labeled Ha and Ho in the structure below, predict the characteristics of their...
For the protons labeled Ha and Ho in the structure below, predict the characteristics of their signals in the H NMR spectrum: the approximate chemical shift, the splitting pattern, and the integration value Approximate chemical shift Splitting Integration value O 1H O 2H 03H O 4H H NMR signal1 ppm for Ha O 2 ppm O 3-4 ppm O 5-6 ppm O 7-8 ppm O singlet O doublet O triplet O quartet O septet O multiplet O 6H H NMR...
4) All signals in the 'H NMR below correspond to particular hydrogens in the molecule. Assign...
4) All signals in the 'H NMR below correspond to particular hydrogens in the molecule. Assign the NMR spectrum by labeling each proton in the molecule with the appropriate lettered signal. OMe 3H, S HO 3H, S 4H, m 1H, s 1H, br PPM 6H, d 3H, d 2H, S 3H, m 1H, q1H, sept PPM
QUESTION 3 Below are the 1H NMR spectrum of isoamyl acetate and the structure (same structure...
QUESTION 3 Below are the 1H NMR spectrum of isoamyl acetate and the structure (same structure as Q1). The blue fonts represent integrated ration per group of hydrogen(s). The peak at S is due to H5 | H5" H2 H2 H1 H6" H4 H1" H3 H6 4.25 3.95 ppm 17 1.5 1.3 0.9 ppm 1ppm 10 1.00 2.94 2.04 Int: 2.01 6.00 8 H2' 6.H3 07 H4 H3
3. Propose structures for compounds that fit the following 1H NMR data: a. C.H.Cl2: 8 1.60...
3. Propose structures for compounds that fit the following 1H NMR data: a. C.H.Cl2: 8 1.60 (doublet, 3H), 2.15 (multiplet, 2H), 3.72 (triplet, 2H), and 4.27 (multiplet, 1H) b. C.H.Br: 8 1.1 (doublet, 6H), 1.9 (multiplet, 1H), and 3.4 (doublet, 2H) c. CH 40:8 0.9 (triplet, 6H), 1.6 (sextet, 4H), and 2.4 (triplet, 4H) d. CsH1002: 8 1.2 (doublet, 6H), 2.0 (singlet, 3H) and 5.0 (septet, 1H)
3. Propose structures for compounds that fit the following 1H NMR data: a. C4H2Cl2: 8 1.60...
3. Propose structures for compounds that fit the following 1H NMR data: a. C4H2Cl2: 8 1.60 (doublet, 3H), 2.15 (multiplet, 2H), 3.72 (triplet, 2H), and 4.27 (multiplet, 1H) b. C4H,Br: 8 1.1 (doublet, 6H), 1.9 (multiplet, 1H), and 3.4 (doublet, 2H) c. C-H140:8 0.9 (triplet, 6H), 1.6 (sextet, 4H), and 2.4 (triplet, 4H) d. C5H1002:8 1.2 (doublet, 6H), 2.0 (singlet, 3H) and 5.0 (septet, 1H)
3. Propose structures for compounds that fit the following 1H NMR data: a. C.HgCl2: 8 1.60...
3. Propose structures for compounds that fit the following 1H NMR data: a. C.HgCl2: 8 1.60 (doublet, 3H), 2.15 (multiplet, 2H), 3.72 (triplet, 2H), and 4.27 (multiplet, 1H) b. C«H,Br: 8 1.1 (doublet, 6H), 1.9 (multiplet, 1H), and 3.4 (doublet, 2H) c. C-H140:8 0.9 (triplet, 6H), 1.6 (sextet, 4H), and 2.4 (triplet, 4H) d. CsH1002: 8 1.2 (doublet, 6H), 2.0 (singlet, 3H) and 5.0 (septet, 1H)
Draw the structure that would be responsible for the spectrum. To make interpretation a little easier,...
Draw the structure that would be responsible for the spectrum.
To make interpretation a little easier, I have included the
splitting type and number of hydrogens for each set of signals in
the spectrum, from left to right. In other words, C4H8O; quartet
(2H), triplet (3H), singlet (3H) means, that the three sets of
peaks, starting from the left are a quartet due to two hydrogens, a
triplet due to three hydrogens and a singlet due to three
hydrogens.
CsHIoO2,...
Propose structures for compounds that fit the following 'H NMR data. CH,Br 2H quintet at 2.48,...
Propose structures for compounds that fit the following 'H NMR data. CH,Br 2H quintet at 2.48, J=6 Hz 4H triplet at 3.5 8, J= 6 Hz 2. C.H.O 2H quartet at 2.5 8, 3H Singlet at 2.0 8, 3H triplet at 1.08 1. C,H40 6H triplet at 0.9 8, J = 7 Hz 4H sextet at 1.6 8, J= 7 Hz 4H triplet at 2.48, J= 7 Hz CH4 6H doublet at 1.28, J= 7 Hz 3H singlet at 2.38...
H NMR: 7.0d (4H, broad singlet); 2.85 o (1H, septet); 2.28 (3H, singlet); 1.20 0(6H doublet) R: 825 cm What is the structure of a hydrocarbon that shows a molecular ion at m/z- 182 in the mass spectrum and has the following 1H NMR spectrum? 7.20, singlet, 5H- 2.9 d, singlet, 2H
H NMR: 7.0d (4H, broad singlet); 2.85 o (1H, septet); 2.28 (3H, singlet); 1.20 0(6H doublet) R: 825 cm What is the structure of a hydrocarbon that shows...
For the protons labeled Ha and Hb in the structure below, predict the characteristics of their signals in the H NMR spectrum: the approximate chemical shift, the splitting pattern, and the integration value of their signals. Approximate Integration Splitting chemical shift value O 1H H NMR signal O 1 ppm O singlet for H O doublet O 2H 2 ppm O 3H O 3-4 ppm O triplet Br O 4H O 5-6 ppm O quartet O 5H O 7-8 ppm...
For the protons labeled Ha and Ho in the structure below, predict the characteristics of their signals in the H NMR spectrum: the approximate chemical shift, the splitting pattern, and the integration value Approximate chemical shift Splitting Integration value O 1H O 2H 03H O 4H H NMR signal1 ppm for Ha O 2 ppm O 3-4 ppm O 5-6 ppm O 7-8 ppm O singlet O doublet O triplet O quartet O septet O multiplet O 6H H NMR...
4) All signals in the 'H NMR below correspond to particular hydrogens in the molecule. Assign the NMR spectrum by labeling each proton in the molecule with the appropriate lettered signal. OMe 3H, S HO 3H, S 4H, m 1H, s 1H, br PPM 6H, d 3H, d 2H, S 3H, m 1H, q1H, sept PPM
QUESTION 3 Below are the 1H NMR spectrum of isoamyl acetate and the structure (same structure as Q1). The blue fonts represent integrated ration per group of hydrogen(s). The peak at S is due to H5 | H5" H2 H2 H1 H6" H4 H1" H3 H6 4.25 3.95 ppm 17 1.5 1.3 0.9 ppm 1ppm 10 1.00 2.94 2.04 Int: 2.01 6.00 8 H2' 6.H3 07 H4 H3
3. Propose structures for compounds that fit the following 1H NMR data: a. C.H.Cl2: 8 1.60 (doublet, 3H), 2.15 (multiplet, 2H), 3.72 (triplet, 2H), and 4.27 (multiplet, 1H) b. C.H.Br: 8 1.1 (doublet, 6H), 1.9 (multiplet, 1H), and 3.4 (doublet, 2H) c. CH 40:8 0.9 (triplet, 6H), 1.6 (sextet, 4H), and 2.4 (triplet, 4H) d. CsH1002: 8 1.2 (doublet, 6H), 2.0 (singlet, 3H) and 5.0 (septet, 1H)
3. Propose structures for compounds that fit the following 1H NMR data: a. C4H2Cl2: 8 1.60 (doublet, 3H), 2.15 (multiplet, 2H), 3.72 (triplet, 2H), and 4.27 (multiplet, 1H) b. C4H,Br: 8 1.1 (doublet, 6H), 1.9 (multiplet, 1H), and 3.4 (doublet, 2H) c. C-H140:8 0.9 (triplet, 6H), 1.6 (sextet, 4H), and 2.4 (triplet, 4H) d. C5H1002:8 1.2 (doublet, 6H), 2.0 (singlet, 3H) and 5.0 (septet, 1H)
3. Propose structures for compounds that fit the following 1H NMR data: a. C.HgCl2: 8 1.60 (doublet, 3H), 2.15 (multiplet, 2H), 3.72 (triplet, 2H), and 4.27 (multiplet, 1H) b. C«H,Br: 8 1.1 (doublet, 6H), 1.9 (multiplet, 1H), and 3.4 (doublet, 2H) c. C-H140:8 0.9 (triplet, 6H), 1.6 (sextet, 4H), and 2.4 (triplet, 4H) d. CsH1002: 8 1.2 (doublet, 6H), 2.0 (singlet, 3H) and 5.0 (septet, 1H)
Draw the structure that would be responsible for the spectrum.
To make interpretation a little easier, I have included the
splitting type and number of hydrogens for each set of signals in
the spectrum, from left to right. In other words, C4H8O; quartet
(2H), triplet (3H), singlet (3H) means, that the three sets of
peaks, starting from the left are a quartet due to two hydrogens, a
triplet due to three hydrogens and a singlet due to three
hydrogens.
CsHIoO2,...
Propose structures for compounds that fit the following 'H NMR data. CH,Br 2H quintet at 2.48, J=6 Hz 4H triplet at 3.5 8, J= 6 Hz 2. C.H.O 2H quartet at 2.5 8, 3H Singlet at 2.0 8, 3H triplet at 1.08 1. C,H40 6H triplet at 0.9 8, J = 7 Hz 4H sextet at 1.6 8, J= 7 Hz 4H triplet at 2.48, J= 7 Hz CH4 6H doublet at 1.28, J= 7 Hz 3H singlet at 2.38...
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