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c. Answer questions about the signals in the following 'H NMR: (1 point each) D (6H) B (2H) C (2H) A (1H) 6 3 PPM 2...
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
The signals in the 1H NMR spectrum of butanoic acid are labelled from A to D....
The signals in the 1H NMR spectrum of butanoic acid are labelled from A to D. Considering the spectrum, answer the questions below: [4 marks] Complete the table: Signal Chemical shift, δ (ppm) Splitting pattern (singlet, doublet, triplet, quartet, pentet, sixtet, septet, octet, nonet, multiplet) # of H neighbours Integration (# of protons) Circle or highlight the proton(s) that give rise to this signal A 11.60 CH3CH2CH2COOH B 2.35 CH3CH2CH2COOH C 1.68 CH3CH2CH2COOH D 0.98 CH3CH2CH2COOH [2 marks] Compare this...
2. Given the 'H NMR spectrum below and a molecular formula of C-H100, provide a structure....
2. Given the 'H NMR spectrum below and a molecular formula of C-H100, provide a structure. Note you must assign all of the signals in the spectrum below to receive full credit. IR: 1710 cm: (5 pts.) 6H, 1H, S 2H, d 1H, m PPM
.(23 pts.) Answer the following NMR questions: (a) How many 'H and 10C would ou d...
.(23 pts.) Answer the following NMR questions: (a) How many 'H and 10C would ou d NMR signals would you expect for the compounds shown below7 Show answers in the boxes. 'H signals 13C signals Hsignals 13c signals Hsignal'C signals H signals 13c signals Please indicate the splitting patterns (singlet, doublet, triplet and so on) for the hydrogens in the structures below. (b) (D) Assign the indicated Hs as 'homotopic. "enantiotopic" or diastereotopic" hydrogens 8 (E) Determine the structures of...
practice quiz 1. (3 pts) For each of the following compounds, indicate whether the two protons...
practice quiz
1. (3 pts) For each of the following compounds, indicate whether the two protons shown are homotopic, enantiotopic, or diastereotopic. 2. (8 pts) Indicate the number of signals each of the following compounds would show in their 'Hand C NMR spectra: OME 'H__ _ H__ __ H__ __ H__ "C 3. (10 pts) For each of the following compounds, determine the multiplicity of each signal in the H NMR spectrum: la xiu ood ex gx x x 4....
*H NMR for: C9H100 3H 2H -1H 1 0 11 109 8 7 6 5 3...
*H NMR for: C9H100 3H 2H -1H 1 0 11 109 8 7 6 5 3 2 ppm Pick the structure that best fits the proton NMR spectrum shown above. OH H OH Et D E
DIRECTIONS: You must complete the entire assignment. 1. Given the 'H NMR spectrum below and a...
DIRECTIONS: You must complete the entire assignment. 1. Given the 'H NMR spectrum below and a molecular formula of CH, 0, provide a structure. Note you must assign all of the signals in the spectrum below to receive full credit. IR: 1600-1650 cm (multiple peaks) (5 pts.) 3H, 3H,t 2H, d 2H, d 2H,9 PPM 2. Given the 'H NMR spectrum below and a molecular formula of C.H.O. provide a structure. Note you must assign all of the signals in...
What protons) yield the 1H NMR signal around 1.8 ppm as a multiplet? H3C CH3 H3C COH H d roton a O Proton "b roton...
What protons) yield the 1H NMR signal around 1.8 ppm as a multiplet? H3C CH3 H3C COH H d roton a O Proton "b roton C O Proton "f O Proton "g
What protons) yield the 1H NMR signal around 1.8 ppm as a multiplet? H3C CH3 H3C COH H d roton a O Proton "b roton C O Proton "f O Proton "g
5. (6) Answer the questions below about the structure that has the followingdata: EA elemental analysis...
5. (6) Answer the questions below about the structure that has the followingdata: EA elemental analysis C% = 75.69; H% - 8.80 EA M 206 3430 (broad), 1705 (stron g) 181.4, 140.9, 137.0, 129.5, 127.4, 45.9, 44.1, 30.3, 22.5,18.2 11.9 (broad s, 1H), 7.21 (d, 2H), 7.09 (d, 2H), 3.70 (q, 1H), 2.44 (d, 2H), 1.84 (nonet (9 lines), 1H), 1.49 (d, 3H), 0.89 (d, 6H) S singlet, de doublet, t triplet, q quartet IR 13CNMR 1H NMR a. Determine...
b) Consider the proton NMR spectrum of the following ketone: O b H C=C C. d...
b) Consider the proton NMR spectrum of the following ketone: O b H C=C C. d CH H с CH: i) ii) Predict the chemical shifts of each type of proton. Predict the multiplicity of NMR signals for each type of protons. Draw a tree diagram to show the splitting predicted for Hy and indicate the number of lines obtain (given Joc = 15 Hz, Jab = 7 Hz). (7 marks)
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
2. Given the 'H NMR spectrum below and a molecular formula of C-H100, provide a structure. Note you must assign all of the signals in the spectrum below to receive full credit. IR: 1710 cm: (5 pts.) 6H, 1H, S 2H, d 1H, m PPM
.(23 pts.) Answer the following NMR questions: (a) How many 'H and 10C would ou d NMR signals would you expect for the compounds shown below7 Show answers in the boxes. 'H signals 13C signals Hsignals 13c signals Hsignal'C signals H signals 13c signals Please indicate the splitting patterns (singlet, doublet, triplet and so on) for the hydrogens in the structures below. (b) (D) Assign the indicated Hs as 'homotopic. "enantiotopic" or diastereotopic" hydrogens 8 (E) Determine the structures of...
practice quiz
1. (3 pts) For each of the following compounds, indicate whether the two protons shown are homotopic, enantiotopic, or diastereotopic. 2. (8 pts) Indicate the number of signals each of the following compounds would show in their 'Hand C NMR spectra: OME 'H__ _ H__ __ H__ __ H__ "C 3. (10 pts) For each of the following compounds, determine the multiplicity of each signal in the H NMR spectrum: la xiu ood ex gx x x 4....
*H NMR for: C9H100 3H 2H -1H 1 0 11 109 8 7 6 5 3 2 ppm Pick the structure that best fits the proton NMR spectrum shown above. OH H OH Et D E
DIRECTIONS: You must complete the entire assignment. 1. Given the 'H NMR spectrum below and a molecular formula of CH, 0, provide a structure. Note you must assign all of the signals in the spectrum below to receive full credit. IR: 1600-1650 cm (multiple peaks) (5 pts.) 3H, 3H,t 2H, d 2H, d 2H,9 PPM 2. Given the 'H NMR spectrum below and a molecular formula of C.H.O. provide a structure. Note you must assign all of the signals in...
What protons) yield the 1H NMR signal around 1.8 ppm as a multiplet? H3C CH3 H3C COH H d roton a O Proton "b roton C O Proton "f O Proton "g
What protons) yield the 1H NMR signal around 1.8 ppm as a multiplet? H3C CH3 H3C COH H d roton a O Proton "b roton C O Proton "f O Proton "g
5. (6) Answer the questions below about the structure that has the followingdata: EA elemental analysis C% = 75.69; H% - 8.80 EA M 206 3430 (broad), 1705 (stron g) 181.4, 140.9, 137.0, 129.5, 127.4, 45.9, 44.1, 30.3, 22.5,18.2 11.9 (broad s, 1H), 7.21 (d, 2H), 7.09 (d, 2H), 3.70 (q, 1H), 2.44 (d, 2H), 1.84 (nonet (9 lines), 1H), 1.49 (d, 3H), 0.89 (d, 6H) S singlet, de doublet, t triplet, q quartet IR 13CNMR 1H NMR a. Determine...
b) Consider the proton NMR spectrum of the following ketone: O b H C=C C. d CH H с CH: i) ii) Predict the chemical shifts of each type of proton. Predict the multiplicity of NMR signals for each type of protons. Draw a tree diagram to show the splitting predicted for Hy and indicate the number of lines obtain (given Joc = 15 Hz, Jab = 7 Hz). (7 marks)
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