A researcher is studying cytochrome oxidase, a protein that uses iron to bind diatomic oxygen. She collects two IR spectra, shown below. In the first spectrum, no isotopic labeling is used (top). In the second, 160 has been replaced with 180 (bottom). 655 820 790 0.5- 714 695 733 655 755 820 0.5- 714 695 733 o+ 600 650 700 750 800 850 Vo (cm") Based on the above ratio, which is the most likely source of this vibration, (a) the Fe-O stretch in Fell-O=O, or (b) the O-O stretch in Fe"-O=O?You can assume that the atomic weight of Fe is 56. % Transmission

Organic Chemistry: A Guided Inquiry
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ISBN:9780618974122
Author:Andrei Straumanis
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ChapterL4: Proton (1h) Nmr Spectroscopy
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A researcher is studying cytochrome oxidase, a protein that uses iron to bind diatomic
oxygen. She collects two IR spectra, shown below. In the first spectrum, no isotopic
labeling is used (top). In the second, 10 has been replaced with 180 (bottom).
820
655
790
0.5-
714
695
733
820
655
755
0.5-
714
695
733
0+
600
650
700
750
800
850
Vo (cm")
Based on the above ratio, which is the most likely source of this vibration, (a) the Fe-O stretch in
Fel-O=0, or (b) the O-O stretch in Fel"-O=O? You can assume that the atomic weight of Fe is 56.
ww n
wwm
% Transmission
Transcribed Image Text:A researcher is studying cytochrome oxidase, a protein that uses iron to bind diatomic oxygen. She collects two IR spectra, shown below. In the first spectrum, no isotopic labeling is used (top). In the second, 10 has been replaced with 180 (bottom). 820 655 790 0.5- 714 695 733 820 655 755 0.5- 714 695 733 0+ 600 650 700 750 800 850 Vo (cm") Based on the above ratio, which is the most likely source of this vibration, (a) the Fe-O stretch in Fel-O=0, or (b) the O-O stretch in Fel"-O=O? You can assume that the atomic weight of Fe is 56. ww n wwm % Transmission
Expert Solution
Answer

The most likely source of this vibration is (b) the O-O stretch in FeII-O=O

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