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a) what bond is present in ketones but not alkanes? b) what is the wavenumber range of the signals that are present in the diagnostic region of all of the ketone IR spectra (but not the alkanes)? c) is the new band strong or weak compared with a C=C or a C≡C stretch?

a) what bond is present in ketones but not alkanes? b) what is the wavenumber range of the signals that are present in the diagnostic region of all of the ketone IR spectra (but not the alkanes)? c) is the new band strong or weak compared with a C=C or a C≡C stretch?

Macroscale and Microscale Organic Experiments
Macroscale and Microscale Organic Experiments
7th Edition
ISBN:9781305577190
Author:Kenneth L. Williamson, Katherine M. Masters
Publisher:Kenneth L. Williamson, Katherine M. Masters
Chapter47: Martius Yellow
Section: Chapter Questions
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a) what bond is present in ketones but not alkanes?

b) what is the wavenumber range of the signals that are present in the diagnostic region of all of the ketone IR spectra (but not the alkanes)?

c) is the new band strong or weak compared with a C=C or a C≡C stretch? 

IR Spectrum of 2-butanone 90 80 70 60 50 30- 20 10 0. 10 4000 3500 3000 2500 2000 1500 1000 500 Wavenumbers (cm-1) IR Spectrum of 3-nonanone 90 80 70 60 50 40 30 20 10- 0- -10 - 4000 3500 3000 2500 2000 1500 1000 500 Wavenumbers (cm-1) % Transmittance Transmittance 40 3416 25 2982 05 2941.93 2931 08 2883 71 2861.89 1719 21 1715.71 1482 27 1418 89L 1368 02 1459 77 1413 83 1257 10 1372.64 1088.41 997.30 946 64
Transcribed Image Text:IR Spectrum of 2-butanone 90 80 70 60 50 30- 20 10 0. 10 4000 3500 3000 2500 2000 1500 1000 500 Wavenumbers (cm-1) IR Spectrum of 3-nonanone 90 80 70 60 50 40 30 20 10- 0- -10 - 4000 3500 3000 2500 2000 1500 1000 500 Wavenumbers (cm-1) % Transmittance Transmittance 40 3416 25 2982 05 2941.93 2931 08 2883 71 2861.89 1719 21 1715.71 1482 27 1418 89L 1368 02 1459 77 1413 83 1257 10 1372.64 1088.41 997.30 946 64
IR Spectrum of 4-methyl-2-pentanone 90 - 80 70 60 50 40 30 20- 10 0- -10 - -20 4000 3500 3000 2500 2000 1500 1000 500 Wavenumbers (cm-1) IR Spectrum of cyclooctanone 95 90 85 80 75 70 65 60 55 50 45 35 30 25 20 15 10 -5 4000 3500 3000 2500 2000 1500 1000 500 Wavenumbers (cm-1) % Transmittance %Transmittance 5, 40 2939.95 2960.91 2869.34 2875.28 1718.83 1719 57 1471.21 1457.95 1368.69 1338.38 1172.47 1204.69 69 0 1091.53
Transcribed Image Text:IR Spectrum of 4-methyl-2-pentanone 90 - 80 70 60 50 40 30 20- 10 0- -10 - -20 4000 3500 3000 2500 2000 1500 1000 500 Wavenumbers (cm-1) IR Spectrum of cyclooctanone 95 90 85 80 75 70 65 60 55 50 45 35 30 25 20 15 10 -5 4000 3500 3000 2500 2000 1500 1000 500 Wavenumbers (cm-1) % Transmittance %Transmittance 5, 40 2939.95 2960.91 2869.34 2875.28 1718.83 1719 57 1471.21 1457.95 1368.69 1338.38 1172.47 1204.69 69 0 1091.53
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