Task 2. Determine the absorption bands of caffeine(Which of the peaks gives auxochrome and which chromophore?/ What parts of the molecule are the bands associated with). Specify chromophores and auxochromes in the molecule((mark in the picture with different colors) 35000 30000 25000 20000 15000 10000 5000 200 A/ nm 250 300 Fig. 1.2-16 UV spectrum in ethanol Fig. 1.2-16 UV spectrum in ethanol CH3 H3C N' CH3 e/(cm2 mmol")
Task 2. Determine the absorption bands of caffeine(Which of the peaks gives auxochrome and which chromophore?/ What parts of the molecule are the bands associated with). Specify chromophores and auxochromes in the molecule((mark in the picture with different colors) 35000 30000 25000 20000 15000 10000 5000 200 A/ nm 250 300 Fig. 1.2-16 UV spectrum in ethanol Fig. 1.2-16 UV spectrum in ethanol CH3 H3C N' CH3 e/(cm2 mmol")
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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Problem on spectroscopic methods in chemistry
Transcribed Image Text:Task 2. Determine the absorption bands of caffeine(Which of the peaks gives
auxochrome and which chromophore?/ What parts of the molecule are the bands
associated with). Specify chromophores and auxochromes in the molecule(mark
in the picture with different colors)
35000
30000
25000
20000
15000
10000
5000
200
A/ nm
250
300
Fig. 1.2-16 UV spectrum in ethanol
Fig. 1.2-16 UV spectrum in ethanol
CH3
H3C-
N.
N.
N.
ČH3
e/(cm' mmol)
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if the peak at about 212nm is redshifted at higher caffeine concentrations...is that mean an increase in conjugation due to the presence of more auxochromes? Or what is the correct explanation for that
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