Principles of Instrumental Analysis
7th Edition
ISBN: 9781305577213
Author: Douglas A. Skoog, F. James Holler, Stanley R. Crouch
Publisher: Cengage Learning
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Chapter 16, Problem 16.6QAP
Interpretation Introduction
Interpretation:
For the N-H stretch, the wavelength and wave number of the fundamental band should be determined.
Concept introduction:
In an
The wave number can be defined as the wavelength per unit distance. The wave number is expressed in
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Chapter 16 Solutions
Principles of Instrumental Analysis
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- The wavenumber of the fundamental vibrational transition of Cl 2 is 565 em·'. Calculate the force constant of thebond.arrow_forwardConsider the molecule Br2. The energy (in cm-1) required to excite Br2 from the ground vibrational state to the 1st excited vibrational state is 323.2 cm-1. Is this molecule IR active? Is the molecule Raman active? Explain?arrow_forwardWhich has a lower characteristic stretching Frequency, the C=O bond or band C-O bond.arrow_forward
- If a hypothetic vibrational motion of a molecule can be described by Tvib = 2A1 + E, within the point group Cav, how many bands/peaks would you expect to see in its IR spectrum? Explain your reasoning. C (4mm) E 2C, C, 20, 20, h=8 A, 1 1 1 1 x + y', 2 1 1 1 A, B, B, 1-1 -1 R. 1 -1 1 -1 x- y 1 -1 1-1 xy 2 0 -2 0 (x, y) (R, R) (2x, y2) 3.arrow_forward3. If a hypothetic vibrational motion of a molecule can be described by Tvib = 2A1 + E, within the point group C4v, how many bands/peaks would you expect to see in its IR spectrum? Explain your reasoning. C, (4mm) E 2C, C, 20, 20. h = 8 1 1 1 1 x² + y', z2 A, 1 1 1 -1 -1 R_ B, 1 -1 1 1 -1 x² – y? B, 1 -1 1 -1 1 xy 2 -2 0 0 (x, y) (R, R) (zx, yz)arrow_forwardCalculate the fundamental vibrational wavenumber of carbon monoxide, considering it to behave like a harmonic oscillator with a force constant 1902.5 Nm. By how much will this wavenumber change if the molecule contains the isotope BC instead of the more abundant 12C? Use m 12u for C, m 13u for 13C and m=16u for 160. OFocus W DELL Esc Ff F2 F3 F4 F5 F6 F7 F8 F9 F10 F1 F12 PS BACK- SPACEarrow_forward
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- The following are infrared absorption wavenumbers (in cm) of two diatomics. Calculate the force constants of the bonds and identify which bond is stiffer. а. H3$Cl: 2990 (in cm) and H$ Br: 2650 (in cm)arrow_forwardThe force constant for the bond in CO is 1857 N/m, Calculate the vibrational frequencies (in Hz) of 12C160, 13C160, 12C180, and 13C180. Use integer relative masses for this estimate.arrow_forward4. Is the C=O stretching frequency the same for acetone and deuterated acetone? Explain your answer. Identify C O overtone in acetone spectrum which corresponds to the transitionn from ground level n= 0, to the second excited levarrow_forward
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