Homework Answers
Carbon atoms without attached hydrogens do not appear in DEPT spectra.
DEPT-90 only shows CH, and DEPT-135 shows CH/CH3 with a positive phase and CH2 with a negative one.
Double bond equivalent of C7H12O2 = 7+1 -12/2 = 2
Conclusion- two double bonds are present.
IR 1738 cm^-1 indicates presence of an ester group.
Proposed structure
This structure matches with 13 CNMR also as there 7 different types of carbon present.
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224 Nuclear Magnetic R a ce Spectroscopy. Part Two Carth-13 S 13. The proton NMR spectrum...
(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...
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...
The proton NMR spectrum of a compound with formula C5H10O is shown
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?
For problems 7-12 answer the questions on the Mass Spectroscopy problem set worksheet.. Problem | Bond...
For problems 7-12 answer the questions on the Mass Spectroscopy
problem set worksheet..
Problem | Bond stretch- Molecular | Halogen/nitrogen IR frequency Ion Peak present? Explain Structure of Compound Structure of MS fragments at... m/= = 91 M = 91 3400cm m/z= 76/78 m/z = 58 m/s = 86 m/z = 58 1740 cm m/:=152/154 m/z= 107/109 m/t = 91 Compound 9 is a high-beiling liquid (boiling point 2010C) that reacts with alkoxide to yield an ether. The Man, IR,...
(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...
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...
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?
For problems 7-12 answer the questions on the Mass Spectroscopy
problem set worksheet..
Problem | Bond stretch- Molecular | Halogen/nitrogen IR frequency Ion Peak present? Explain Structure of Compound Structure of MS fragments at... m/= = 91 M = 91 3400cm m/z= 76/78 m/z = 58 m/s = 86 m/z = 58 1740 cm m/:=152/154 m/z= 107/109 m/t = 91 Compound 9 is a high-beiling liquid (boiling point 2010C) that reacts with alkoxide to yield an ether. The Man, IR,...
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