FLOCO E CUO T n t 80- 60- 40- 20- 4000 3500 3000 2000 Wavenumbers 2500 mm 1500 1000 500

Chemistry
10th Edition
ISBN:9781305957404
Author:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste
Publisher:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste
Chapter1: Chemical Foundations
Section: Chapter Questions
Problem 1RQ: Define and explain the differences between the following terms. a. law and theory b. theory and...
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FLOCO ECCO
m
80
60-
40-
20-
4000
3500
3000
2500
2000
Wavenumbers
m
1500
1000
500
Transcribed Image Text:FLOCO ECCO m 80 60- 40- 20- 4000 3500 3000 2500 2000 Wavenumbers m 1500 1000 500
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 cm", 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 cm
-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 cm
Broad, strong peak centered at about 3300 cm
-O-H, in alcohols, phenols, and water, for
example
Sharp, strong peak at about 1700 cm
-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 cm, 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 cm", 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 cm -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 cm Broad, strong peak centered at about 3300 cm -O-H, in alcohols, phenols, and water, for example Sharp, strong peak at about 1700 cm -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 cm, the latter in the case of a mono-substituted benzene ring
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