The proton NMR spectrum of a compound with formula C5H10O is shown. The DEPT experimental results are tabulated. The infrared spectrum shows the characteristic absorption bands for the proton directly attached to the same carbon of the carbonyl group at 2968, 2937, 2880, 2811, and 2711 cm-1 and strong bands at 1728 cm-1.
What is the structure which fit with these data?
Homework Answers
Identify the compound A (C5H10O) with the proton NMR spectrum shown. Compound A has IR absorptions...
Identify the compound A (C5H10O) with the proton NMR spectrum shown. Compound A has IR absorptions at 3200�3600 cm�1 (strong, broad), 1676 cm�1 (weak), and 965 cm�1, and also has 13C NMR absorptions (attached protons in parentheses) at ? 17.5 (3), ? 23.3 (3), ? 68.8 (1), ? 125.5 (1), and ? 135.5 (1). Compound A may be resolved into enantiomers; draw one molecule of A, omitting wedge/dash bonds.
224 Nuclear Magnetic R a ce Spectroscopy. Part Two Carth-13 S 13. The proton NMR spectrum...
224 Nuclear Magnetic R a ce Spectroscopy. Part Two Carth-13 S 13. The proton NMR spectrum of a compound with formula CH.0, is shown. The infrared spee trumdisplays a strong band at 1738 cm and a weak band at 1689 cm. The normal carbon-13 and the DEPT experimental results are tabulated. Draw the structure of this compound Normal Carbon DEPT-135 DEPT-90 18 ppm Positive Positive Positive Negative Positive No peak No peak No peak No peak No peak No peak...
The proton NMR spectrum for a compound with the formula C,H,O, is shown below along with...
The proton NMR spectrum for a compound with the formula C,H,O, is shown below along with the spectral data in tabular form. (It may be necessary to expand (zoom) some of the 'H signals to view spin-spin splitting details.) This compound exhibits strong infrared absorption at 1727 and 1195 em plus a medium intensity band at 1637 cm! 13C NMR Data 'H NMR Data Proton Shift Relative Area Normal Carbon DEPT-135 DEPT-90 14.2 Positive No peak 60.4 Negative No peak...
(References The proton NMR spectrum for a compound with the formula C,H,O is shown below along...
(References The proton NMR spectrum for a compound with the formula C,H,O is shown below along with the spectral data in tabular form. (It may be necessary to expand (zoom) some of the 'H signals to view spin-spin splitting details.) Intensity 258 $ $ 488 14 13 12 11 10 9 8 7 6 5 4 3 Chemical Shift (oppm 2 1 0 . Reproduced with permission from Sim. Aldri Ca LLC The IH signal at 2.15 ppm is an...
(References) The proton NMR spectrum for a compound with the formula C,H,NO, is shown below along with the spectr...
(References) The proton NMR spectrum for a compound with the formula C,H,NO, is shown below along with the spectral data in tabular form. (It may be necessary to expand (zoom) some of the 'H signals to view spin-spin splitting details.) Intensity 14 13 12 11 10 9 2 1 0 1 -2 -3 8 7 6 5 4 3 Chemical Shift (6) ppm Reproduced with permission from Sigma-Aldrich Co. LLC The infrared spectrum exhibits strong bands at 1750 and 1562...
2. (10 points) The proton NMR spectrum of a compound with a formula CsH100 is shown....
2. (10 points) The proton NMR spectrum of a compound with a formula CsH100 is shown. The decoupled carbon-13 and DEPT results are show in the table. The infrared spectrum shows a broad peak at about 3340cm and a medium peak about 1650 cm. Draw a structure for this compound and explain the data. Decoupled "CNMR, DEPT- DEPT-90 ppm 135 22.2 positive no peak 40.9 negative no peak 60.2 negative no peak 112.5 negative no peak 142.3 no peak no...
A compound with a molecular formula C5H10O has the following 1H NMR spectrum. Provide a structure...
A compound with a molecular formula C5H10O
has the following 1H NMR spectrum. Provide a structure
that is consistent with this spectrum.
3. A compound with a molecular formula CsHioO has the following 'H NMR spectrum. pound with a molecular formula CsHioO has the following H NMR Propose a structure for this compound. PPM
Compound B (C8H12O2) shows a strong carbonyl absorption in its IR spectrum. The broadband proton-decoupled 13C...
Compound B (C8H12O2) shows a strong carbonyl absorption in its IR spectrum. The broadband proton-decoupled 13C NMR spectrum of B has only three signals, at δ 19 (CH3), 71 (C), and 216 (C). Propose a structure for B.
The ^1H NMR spectrum below corresponds to an unknown compound with the molecular formula C_6H_10. There...
The ^1H NMR spectrum below corresponds to an unknown compound with the molecular formula C_6H_10. There are no strong IR bands between 2100 and 2300 or 3250 and 3350 cm^-1. Deduce and draw the structure of the molecule that corresponds to the data.
4. The proton NMR and IR spectra of Compound B are shown on the next page....
4. The proton NMR and IR spectra of Compound B are shown on the next page. Using the molecular formula C,H,O: (a) Calculate the index of unsaturation. (b) Assign at least three absorption bands in the IR spectrum to functional groups. (C) By considering this value in your analysis of the spectra, give the correct structure for unknown B. Integration values are given above the peaks. (d) Label all peaks in the NMR spectrum, i.e., Ha, Hb, etc., and place...
224 Nuclear Magnetic R a ce Spectroscopy. Part Two Carth-13 S 13. The proton NMR spectrum of a compound with formula CH.0, is shown. The infrared spee trumdisplays a strong band at 1738 cm and a weak band at 1689 cm. The normal carbon-13 and the DEPT experimental results are tabulated. Draw the structure of this compound Normal Carbon DEPT-135 DEPT-90 18 ppm Positive Positive Positive Negative Positive No peak No peak No peak No peak No peak No peak...
The proton NMR spectrum for a compound with the formula C,H,O, is shown below along with the spectral data in tabular form. (It may be necessary to expand (zoom) some of the 'H signals to view spin-spin splitting details.) This compound exhibits strong infrared absorption at 1727 and 1195 em plus a medium intensity band at 1637 cm! 13C NMR Data 'H NMR Data Proton Shift Relative Area Normal Carbon DEPT-135 DEPT-90 14.2 Positive No peak 60.4 Negative No peak...
(References The proton NMR spectrum for a compound with the formula C,H,O is shown below along with the spectral data in tabular form. (It may be necessary to expand (zoom) some of the 'H signals to view spin-spin splitting details.) Intensity 258 $ $ 488 14 13 12 11 10 9 8 7 6 5 4 3 Chemical Shift (oppm 2 1 0 . Reproduced with permission from Sim. Aldri Ca LLC The IH signal at 2.15 ppm is an...
(References) The proton NMR spectrum for a compound with the formula C,H,NO, is shown below along with the spectral data in tabular form. (It may be necessary to expand (zoom) some of the 'H signals to view spin-spin splitting details.) Intensity 14 13 12 11 10 9 2 1 0 1 -2 -3 8 7 6 5 4 3 Chemical Shift (6) ppm Reproduced with permission from Sigma-Aldrich Co. LLC The infrared spectrum exhibits strong bands at 1750 and 1562...
2. (10 points) The proton NMR spectrum of a compound with a formula CsH100 is shown. The decoupled carbon-13 and DEPT results are show in the table. The infrared spectrum shows a broad peak at about 3340cm and a medium peak about 1650 cm. Draw a structure for this compound and explain the data. Decoupled "CNMR, DEPT- DEPT-90 ppm 135 22.2 positive no peak 40.9 negative no peak 60.2 negative no peak 112.5 negative no peak 142.3 no peak no...
A compound with a molecular formula C5H10O
has the following 1H NMR spectrum. Provide a structure
that is consistent with this spectrum.
3. A compound with a molecular formula CsHioO has the following 'H NMR spectrum. pound with a molecular formula CsHioO has the following H NMR Propose a structure for this compound. PPM
The ^1H NMR spectrum below corresponds to an unknown compound with the molecular formula C_6H_10. There are no strong IR bands between 2100 and 2300 or 3250 and 3350 cm^-1. Deduce and draw the structure of the molecule that corresponds to the data.
4. The proton NMR and IR spectra of Compound B are shown on the next page. Using the molecular formula C,H,O: (a) Calculate the index of unsaturation. (b) Assign at least three absorption bands in the IR spectrum to functional groups. (C) By considering this value in your analysis of the spectra, give the correct structure for unknown B. Integration values are given above the peaks. (d) Label all peaks in the NMR spectrum, i.e., Ha, Hb, etc., and place...
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