A review of infrared spectroscopy of proteins contains the following two statements: i) The C=O stretching vibration absorbs near 1650 cm-¹ ii) The N-H stretching vibration gives rise to the amide A band between 3310 and 3270 cm¹ The bond energy values for single bonds N-H and C-O are 386 kJ/mol and 380 kJ/mol respectively. a) Your colleague is asking you for a quantitative explanation on why the IR wavenumber (in cm¹) of the N-H stretching vibrations is about double of that for C=O stretching vibrations.
A review of infrared spectroscopy of proteins contains the following two statements: i) The C=O stretching vibration absorbs near 1650 cm-¹ ii) The N-H stretching vibration gives rise to the amide A band between 3310 and 3270 cm¹ The bond energy values for single bonds N-H and C-O are 386 kJ/mol and 380 kJ/mol respectively. a) Your colleague is asking you for a quantitative explanation on why the IR wavenumber (in cm¹) of the N-H stretching vibrations is about double of that for C=O stretching vibrations.
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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Transcribed Image Text:A review of infrared spectroscopy of proteins contains the following two statements:
i) The C=O stretching vibration absorbs near 1650 cm™¹
ii) The N-H stretching vibration gives rise to the amide A band between 3310 and 3270 cm-¹
The bond energy values for single bonds N-H and C-O are 386 kJ/mol and 380 kJ/mol
respectively.
a) Your colleague is asking you for a quantitative explanation on why the IR wavenumbers
(in cm-¹) of the N-H stretching vibrations is about double of that for C=O stretching
vibrations.
Provide your explanation by combining all relevant quantitative elements
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