Homework Answers
Molecular formula = C4H10O2
Sites of unsaturation = 0
Out of given spectra, Spectra a possess 10 protons. Others does not contain the required protons therefore, given molecular formula matches with Spectra A
Molecular formula = C7H7Br
Sites of unsaturation = 4 (indicates aromatic ring present)
Out of given spectra, spectra b and d contain aromatic protons but only spectra b contain 7 protons in it
therefore, given molecular formula matches with Spectra B
Molecular formula = C4H9Br
Sites of unsaturation = 0
Out of given spectra, spectra C contain 9 protons in it
therefore, given molecular formula matches with Spectra C
Molecular formula = C8H9Br
Sites of unsaturation = 4 (aromatic ring present)
Out of given spectra, spectra D contain 9 protons in it and presence of aromatic ring in it.
therefore, given molecular formula matches with Spectra D
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8) Propose plausible structures for the five compounds whose proton NMR spectra are shown: (a) C.H.Oz....
Propose plausible structures for the five compounds whose proton NMR spectra are shown: C_4H_10O_2; C_7H_7Br; C_4H_9Br;...
Propose plausible structures for the five compounds whose proton NMR spectra are shown: C_4H_10O_2; C_7H_7Br; C_4H_9Br; C_8H_9Br.
4) The 1H-NMR spectra shown below correspond to a compound of general formula CH,Br. Propose a...
4) The 1H-NMR spectra shown below correspond to a compound of general formula CH,Br. Propose a plausible structure for this compound. a) Explain the multiplicity and the chemical shift of each signal b) Indicate in each signal how you would calculate the coupling constants (5). Give an approximate value (range) for each of the expected ) values c) Indicate the 'H coupling showing the above-indicated J values ? -3.31 2.01 1.00 6.03
Please help me understand how to obtain the structures of the compounds for the NMR spectra...
Please help me understand how to obtain the structures
of the compounds for the NMR spectra
The NMR spectra are shown for two isomeric compounds with formula C_10H_12O_2. Their infrared spectra show strong bands near 1735cm^-1. Make no attempt to interpret the aromatic proton area between 7.0 and 7.5 ppm except to determine the number of protons attached to the aromatic ring. Draw the structures of the compounds.
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)
13-39 Sketch your predictions of the proton NMR spectra of the following compounds. (a) CH-0-CH.CH ~...
13-39 Sketch your predictions of the proton NMR spectra of the following compounds. (a) CH-0-CH.CH ~ NH₂ (b) (CH3),CH-C-CH CH; (1) CH-O CH (c) CI-CH2 - CH2 - CH2-a но NO₂ 0 H₂CCCC_CH₃ H 13-40 NH2 Tell precisely how you would nee the nton NMD
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...
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)
6. The 'H-NMR spectra shown below correspond to a compound of general forma C D 2H...
6. The 'H-NMR spectra shown below correspond to a compound of general forma C D 2H 1H 2H 2H2H TTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTT 10.0 9.5 9.5 8.5 8.6 7.5 7.0 PPM a) Propose a plausible structure for this compound (3 points) b) Assign each signal from the 1H-NMR spectra to the corresponding hydrogen atoms in compound. Explain for each signal the observed splitting pattern and the chemical sh
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)
PROBLEM 8. NMR. Design (=draw) proton spectra for the following compounds: A B Answer- no words...
PROBLEM 8. NMR. Design (=draw) proton spectra for the following compounds: A B Answer- no words necessary. Drawing-I understand it is going to be a very "approximate drawing. A 10art4 PPM В PPM
Propose plausible structures for the five compounds whose proton NMR spectra are shown: C_4H_10O_2; C_7H_7Br; C_4H_9Br; C_8H_9Br.
4) The 1H-NMR spectra shown below correspond to a compound of general formula CH,Br. Propose a plausible structure for this compound. a) Explain the multiplicity and the chemical shift of each signal b) Indicate in each signal how you would calculate the coupling constants (5). Give an approximate value (range) for each of the expected ) values c) Indicate the 'H coupling showing the above-indicated J values ? -3.31 2.01 1.00 6.03
Please help me understand how to obtain the structures
of the compounds for the NMR spectra
The NMR spectra are shown for two isomeric compounds with formula C_10H_12O_2. Their infrared spectra show strong bands near 1735cm^-1. Make no attempt to interpret the aromatic proton area between 7.0 and 7.5 ppm except to determine the number of protons attached to the aromatic ring. Draw the structures of the compounds.
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)
13-39 Sketch your predictions of the proton NMR spectra of the following compounds. (a) CH-0-CH.CH ~ NH₂ (b) (CH3),CH-C-CH CH; (1) CH-O CH (c) CI-CH2 - CH2 - CH2-a но NO₂ 0 H₂CCCC_CH₃ H 13-40 NH2 Tell precisely how you would nee the nton NMD
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...
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)
6. The 'H-NMR spectra shown below correspond to a compound of general forma C D 2H 1H 2H 2H2H TTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTT 10.0 9.5 9.5 8.5 8.6 7.5 7.0 PPM a) Propose a plausible structure for this compound (3 points) b) Assign each signal from the 1H-NMR spectra to the corresponding hydrogen atoms in compound. Explain for each signal the observed splitting pattern and the chemical sh
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)
PROBLEM 8. NMR. Design (=draw) proton spectra for the following compounds: A B Answer- no words necessary. Drawing-I understand it is going to be a very "approximate drawing. A 10art4 PPM В PPM
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