Homework Answers
1) propose structure
As there are hydrogens showing peak near 7.1 ppm, these must be aromatic hydrogens
So the compound contains 10 aromatic hydrogen , this is possible with two aromatic rings
The possible structure is
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Propose a structure for the following compounds based their the signals to the proper H (...
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. 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)
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 11 MR. w Og a. C.H.Cl: 6...
3. Propose structures for compounds that fit the following 11 MR. w Og a. C.H.Cl: 6 1.60 (doublet, 3H), 2.15 (multiplet, 2H), 3.72 (triplet, 29), 27 (1) b. C.H.Br: 81.1 (doublet, 6H), 1.9 (multiplet, 1H), and 3A (doublet, 2H) c. C H 40:8 0.9 (triplet, 6H), 1.6 (sextet, 4H), and 2.4 (triplet, 4H) d. CsH1002: 81.2 (doublet, 6H), 2.0 (singlet, 3H) and 5.0 (septet, 18)
2. Use the 'H NMR and IR data to determine the structure of the following compounds...
2. Use the 'H NMR and IR data to determine the structure of the following compounds and name them. Compound A Molecular formula: CroH IR absorptions at N/A H NMR data: 1.3 (singlet, 9H), 7.0 to 7.5 (multiplet, 5H) ppm Compound B Molecular formula: CHO IR absorptions at 1H NMR data: 1735-1745, 1050 cm 0.93 (doublet, 6H), 1.52 (multiplet, 2H), 1.69 (multiplet, 1H), 2.04 (singlet, 3H), and 4.10 (triplet,2H) ppm Compound C Molecular ion: IR absorptions at 1710 cm 1H...
4. Consider the following two diastercomers: Both compounds generate 'H NMR spectra with the following signals:...
4. Consider the following two diastercomers: Both compounds generate 'H NMR spectra with the following signals: A multiplet between 7.20-7.63 ppm with an integration of 5H Two separate doublets between 5.70-6.50 ppm, each with an integration of 1H A singlet around 1.30 ppm with an integration of 9H Despite the similarities, how could you differentiate between the H NMR spectra of these isomers? 5. Assign each set of protons to their appropriate signals in the 'H NMR spectrum shown below....
2. Draw the structure of the compound with molecular formula C H1N exhibiting a triplet at...
2. Draw the structure of the compound with molecular formula C H1N exhibiting a triplet at 8 0.9 (6H), a singlet at 8 1.1 (1H), a sextet at 01.3 (4H), a quintet at 8 1.4 (4H) and a triplet at 8 2.6 (4H) in its 'H NMR spectrum. Its IR spectrum shows a medium absorption band near 3400 cm' and its 13C NMR spectrum showed peaks at 13.7, 20.5, 30.4 and 49.2. (2 pts.) 3. Synthesize the following by showing...
Draw the structure that would be responsible or the following spectra: 3. C,H,O; triplet (4H), quintet...
Draw the structure that would be responsible or the following
spectra:
3. C,H,O; triplet (4H), quintet (2H) 11 10 4 ppm 4. CH,02; multiplet (5H), quartet (2H), triplet (3H) 10 9 8 6 5 3 2 0 ppm
1. Identify the following molecule with formula C. H.O based on the following spectral data: IR: 1736, 3028, 2954 m SH. (10 pls) H NMR 8 1.2, triplet, 311: 2.55, triplet, 211, 2.92, triplet, 211,...
1. Identify the following molecule with formula C. H.O based on the following spectral data: IR: 1736, 3028, 2954 m SH. (10 pls) H NMR 8 1.2, triplet, 311: 2.55, triplet, 211, 2.92, triplet, 211, 4.15, quartet, 21H, 7.1-73, multiplet, 2 Name the following molecules (20 pts) CH
1. Identify the following molecule with formula C. H.O based on the following spectral data: IR: 1736, 3028, 2954 m SH. (10 pls) H NMR 8 1.2, triplet, 311: 2.55, triplet, 211,...
Question 29 1. CH3CH2MgBr H Cr04 Which of the following is a synthesis of 3-heptanone? CA....
Question 29 1. CH3CH2MgBr H Cr04 Which of the following is a synthesis of 3-heptanone? CA. 1. DMSO, (COCI)2 CH3CH2CH2CH2CH2OH 2. EtzN B. CH(CH3)2CH Li H30+ CH3CH2CN ether 2. H30* с с. PBr3 NaCN CH3CH2MgBr H30+ CH3CH2CH2CH2OH ether ether D. 1.03 2. Zn/H E. All of these choices are syntheses of 3-heptanone. Question 30 A compound with the molecular formula C 10H 13Cl gave the following 1H NMR spectrum: singlet, 8 1.6 singlet, 3.1 multiplet, 5 7.2 (5H) The most...
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. 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)
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 11 MR. w Og a. C.H.Cl: 6 1.60 (doublet, 3H), 2.15 (multiplet, 2H), 3.72 (triplet, 29), 27 (1) b. C.H.Br: 81.1 (doublet, 6H), 1.9 (multiplet, 1H), and 3A (doublet, 2H) c. C H 40:8 0.9 (triplet, 6H), 1.6 (sextet, 4H), and 2.4 (triplet, 4H) d. CsH1002: 81.2 (doublet, 6H), 2.0 (singlet, 3H) and 5.0 (septet, 18)
2. Use the 'H NMR and IR data to determine the structure of the following compounds and name them. Compound A Molecular formula: CroH IR absorptions at N/A H NMR data: 1.3 (singlet, 9H), 7.0 to 7.5 (multiplet, 5H) ppm Compound B Molecular formula: CHO IR absorptions at 1H NMR data: 1735-1745, 1050 cm 0.93 (doublet, 6H), 1.52 (multiplet, 2H), 1.69 (multiplet, 1H), 2.04 (singlet, 3H), and 4.10 (triplet,2H) ppm Compound C Molecular ion: IR absorptions at 1710 cm 1H...
4. Consider the following two diastercomers: Both compounds generate 'H NMR spectra with the following signals: A multiplet between 7.20-7.63 ppm with an integration of 5H Two separate doublets between 5.70-6.50 ppm, each with an integration of 1H A singlet around 1.30 ppm with an integration of 9H Despite the similarities, how could you differentiate between the H NMR spectra of these isomers? 5. Assign each set of protons to their appropriate signals in the 'H NMR spectrum shown below....
2. Draw the structure of the compound with molecular formula C H1N exhibiting a triplet at 8 0.9 (6H), a singlet at 8 1.1 (1H), a sextet at 01.3 (4H), a quintet at 8 1.4 (4H) and a triplet at 8 2.6 (4H) in its 'H NMR spectrum. Its IR spectrum shows a medium absorption band near 3400 cm' and its 13C NMR spectrum showed peaks at 13.7, 20.5, 30.4 and 49.2. (2 pts.) 3. Synthesize the following by showing...
Draw the structure that would be responsible or the following
spectra:
3. C,H,O; triplet (4H), quintet (2H) 11 10 4 ppm 4. CH,02; multiplet (5H), quartet (2H), triplet (3H) 10 9 8 6 5 3 2 0 ppm
1. Identify the following molecule with formula C. H.O based on the following spectral data: IR: 1736, 3028, 2954 m SH. (10 pls) H NMR 8 1.2, triplet, 311: 2.55, triplet, 211, 2.92, triplet, 211, 4.15, quartet, 21H, 7.1-73, multiplet, 2 Name the following molecules (20 pts) CH
1. Identify the following molecule with formula C. H.O based on the following spectral data: IR: 1736, 3028, 2954 m SH. (10 pls) H NMR 8 1.2, triplet, 311: 2.55, triplet, 211,...
Question 29 1. CH3CH2MgBr H Cr04 Which of the following is a synthesis of 3-heptanone? CA. 1. DMSO, (COCI)2 CH3CH2CH2CH2CH2OH 2. EtzN B. CH(CH3)2CH Li H30+ CH3CH2CN ether 2. H30* с с. PBr3 NaCN CH3CH2MgBr H30+ CH3CH2CH2CH2OH ether ether D. 1.03 2. Zn/H E. All of these choices are syntheses of 3-heptanone. Question 30 A compound with the molecular formula C 10H 13Cl gave the following 1H NMR spectrum: singlet, 8 1.6 singlet, 3.1 multiplet, 5 7.2 (5H) The most...
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