Draw the Lewis structure and describe the bonding in Cr2(CH3COO)4(H2O)2 using MO theory. In the Raman spectrum an intensive line at 556 cm-1 is observed. Assign this band and calculate the force constant using the approach that only two atoms are involved in this vibration. (For comparison: Cd22+ 111 N/m and Hg22+ 169 N/m)

Draw the Lewis structure and describe the bonding in Cr2(CH3COO)4(H2O)2 using MO theory. In the Raman spectrum an intensive line at 556 cm-1 is observed. Assign this band and calculate the force constant using the approach that only two atoms are involved in this vibration. (For comparison: Cd22+ 111 N/m and Hg22+ 169 N/m)

Principles of Modern Chemistry

8th Edition

ISBN:9781305079113

Author:David W. Oxtoby, H. Pat Gillis, Laurie J. Butler

Publisher:David W. Oxtoby, H. Pat Gillis, Laurie J. Butler

Chapter20: Molecular Spectroscopy And Photochemistry

Section: Chapter Questions

Problem 52AP

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Draw the lewis structure and describe the bondong in Cr2(CH3COO)4(H2O)2 using MO theory. In the Raman spectrum an intensive line at 556 cm-1 is observed. Assign this band and calculate the force constant using the approach that only two atoms are involved in this vibration.
When CHCl3 is cooled to liquid N2 temperatures (frozen) and a Raman spectrum taken, some of the peaks split into a variety of multiplets. Give a rational explanation for this behaviour. Refer to Cl35 and Cl37 isotopes
Draw the Lewis structure and describe the bonding in Cr2(CH3COO)4(H2O)2 using MO theory. In the Raman spectrum an intensive line at 556 cm-1 is observed. Assign this band and calculate the force constant using the approach that only two atoms are involved in this vibration. (For comparison: Cd22+ 111 N/m and Hg22+ 169 N/m) - Please answer without copying solutions
Functional groups such as anhydride, carboxylate (but not carboxylic acid), nitro, primary amino give two stretching vibrational bands in the infrared spectrum. What is the origin of these two bands ?
1. Suggest 3 applications of Raman spectroscopy. 2. How polarizability is related to electric dipole moment? 3. How does the induced dipole moment occur? 4. Give the general parts of a Raman spectrophotometer. 5. Raman spectroscopy and infrared spectroscopy measures the vibrational frequencies of a molecule. List the differences between these two spectroscopic techniques.
It might be unexpected that the Karplus equation, which was first derived for 3JHH coupling constants, should also apply to three-bond coupling between the nuclei of metallic elements such as tin. T.N. Mitchell and B. Kowall (Magn. Reson. Chem. 33, 325 (1995)) have studied the relation between 3JHH and 3JSnSn in compounds of the type Me3SnCH2CHRSnMe3 and find that 3JSnSn = 78.86 Hz and 3JHH =27.84 Hz. (a) Does this result support a Karplus type equation for tin nuclei? Explain your reasoning. (b) Obtain the Karplus equation for 3JSnSn and plot it as a function of the dihedral angle. (c) Draw the preferred conformation.
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