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Fig. A. FLOCOEVCUO Fig. B. 0030303074 40 Mur 4000 3500 3000 20. 4000 3500 3000 2000 2500 Wavenumbere 2000 Wavenumbere 2500 1500 1500 1000 1000 500 500

Fig. A. FLOCOEVCUO Fig. B. 0030303074 40 Mur 4000 3500 3000 20. 4000 3500 3000 2000 2500 Wavenumbere 2000 Wavenumbere 2500 1500 1500 1000 1000 500 500

EBK A SMALL SCALE APPROACH TO ORGANIC L
EBK A SMALL SCALE APPROACH TO ORGANIC L
4th Edition
ISBN:9781305446021
Author:Lampman
Publisher:Lampman
Chapter96: Carbon-13 Nuclear Magnetic Resonance Spectroscopy
Section: Chapter Questions
Problem 2P
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1. 1. For each of the four IR spectra shown in A and Fig. B tell which of the six bonds are present (refer to Table) and which are absent. When finished, suggest a total structure for each that fits your observations in each case. RECOGNIZABLE PEAKS Bond Description of Peak -C-H, where C is not part of a benzene ring Sharp, strong peak on the low side of 3000 cm¹, between about 2850 and 3000 cm -C-H, where C is part of a benzene ring or double bond Sharp, medium peak on the high side of 3000 cm, between about 3000 and 3100 cm¹ -C-H, where C is part of a triple bond Sharp, medium peak on the high side of 3000 cm, between about 3250 and 3300 cm¹ Broad, strong peak centered at about 3300 cm¹¹ -O-H, in alcohols, phenols, and water, for example Sharp, strong peak at about 1700 cm-¹ -C=O, in aldehydes, ketones, etc. -C-C-, in benzene rings Two sharp, strong peaks near 1500 and 1600 cm, a series of weak peaks (called overtones) between 1600 and 2000 cm¹, the latter in the case of a mono-substituted benzene ring
Transcribed Image Text:1. 1. For each of the four IR spectra shown in A and Fig. B tell which of the six bonds are present (refer to Table) and which are absent. When finished, suggest a total structure for each that fits your observations in each case. RECOGNIZABLE PEAKS Bond Description of Peak -C-H, where C is not part of a benzene ring Sharp, strong peak on the low side of 3000 cm¹, between about 2850 and 3000 cm -C-H, where C is part of a benzene ring or double bond Sharp, medium peak on the high side of 3000 cm, between about 3000 and 3100 cm¹ -C-H, where C is part of a triple bond Sharp, medium peak on the high side of 3000 cm, between about 3250 and 3300 cm¹ Broad, strong peak centered at about 3300 cm¹¹ -O-H, in alcohols, phenols, and water, for example Sharp, strong peak at about 1700 cm-¹ -C=O, in aldehydes, ketones, etc. -C-C-, in benzene rings Two sharp, strong peaks near 1500 and 1600 cm, a series of weak peaks (called overtones) between 1600 and 2000 cm¹, the latter in the case of a mono-substituted benzene ring
Fig. A. FLOCOEVCUO Fig. B. 0030303074 40 Mur 4000 3500 3000 20. 4000 3500 3000 2000 2500 Wavenumbere 2000 Wavenumbere 2500 1500 1500 1000 1000 500 500
Transcribed Image Text:Fig. A. FLOCOEVCUO Fig. B. 0030303074 40 Mur 4000 3500 3000 20. 4000 3500 3000 2000 2500 Wavenumbere 2000 Wavenumbere 2500 1500 1500 1000 1000 500 500
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