2. The rovibrational absorption spectrum below corresponds to the V4 band of NH3. Use the wavenumbers of the visible lines in the zoomed region to determine the distance (in Å) of the hydrogen atoms from the principal (C3) axis. Note the lines are colour coded for AK. mN = 14.007 amu, m₁ = 1.008 amu. Q Th 1400 HP ▬ R- 1500 1600 1700 1800 v/cm¹ ΔΚ = 0 AK = ±1 1623.75- 1627.00- 1630.25- 1636.44 1642.64- 1645.89- 1649.14- 1655.03- 1661.52 1664.78- v/cm²¹

2. The rovibrational absorption spectrum below corresponds to the V4 band of NH3. Use the wavenumbers of the visible lines in the zoomed region to determine the distance (in Å) of the hydrogen atoms from the principal (C3) axis. Note the lines are colour coded for AK. mN = 14.007 amu, m₁ = 1.008 amu. Q Th 1400 HP ▬ R- 1500 1600 1700 1800 v/cm¹ ΔΚ = 0 AK = ±1 1623.75- 1627.00- 1630.25- 1636.44 1642.64- 1645.89- 1649.14- 1655.03- 1661.52 1664.78- v/cm²¹

Fundamentals Of Analytical Chemistry

9th Edition

ISBN:9781285640686

Author:Skoog

Publisher:Skoog

Chapter24: Introduction To Spectrochemical Methods

Section: Chapter Questions

Problem 24.8QAP

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Question

2. The rovibrational absorption spectrum below corresponds to the V4 band of NH3.
Use the wavenumbers of the visible lines in the zoomed region to determine the
distance (in Å) of the hydrogen atoms from the principal (C3) axis. Note the lines are
colour coded for AK. mN = 14.007 amu, m₁ = 1.008 amu.
Q
-R
1400
1500
1600
1700
1800
V/cm-1
AK = 0
AK = ±1
1623.75-
1627.00-
1630.25-
1636.44-
1642.64-
1649.14-
1645.89
1655.03-
1661.52-
1664.78-
v/cm-1

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Step 2: Calculating the Reduced Mass

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Step 3: Identifying the P, Q, and R branches in the spectrum:

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Step 4: Determining the Rotational constant B:

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Step 5: Calculation of Moment of Inertia:

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Step 6: Determining the Bond length :

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