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a. Perform a complete vibrational symmetry analysis for the molecule trans-F2N2 and determine the IR and Raman activities.
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- The mutual exclusion rule states that for certain molecules, vibrations that are IR-active are not Raman-active, and vice versa. Molecules must have a certain symmetry element in order for the mutual exclusion rule to apply. Examine the character tables in Appendix 3 and determine what that symmetry element is.Which of the following molecules should have pure rotational spectra? a Deuterium, D2 D is 2H b Carbon monoxide, CO c cis1,2Dichloroethylene d trans1,2Dichloroethylene e Chloroform, CHCl3 f Buckminsterfullerene, C60What is the term symbol for the ground state of a Li, b Al,c Sc?
- The rovibrational spectrum of acetylene, HCCH, shows intensity variations consistent with expected nuclear degeneracies. Would you expect DCCH to show similar intensity variations? Why or why not?Assume that x- polarized light can be assigned an E symmetry species in a system that has C4v symmetry. Can a transition from E state to a B2 state occur? Why or why not?The SrH molecule in a 2+ electronic ground state. What are the term symbols of the electronic states that can be accessed by allowed electronic transitions?
- You have a square planar PH4+ molecule: i) show your working to obtain the reducible representation? ii) How many vibrational modes would be visible for raman and IR spectroscopy, show all workingHow many vibrational modes does an SO3 molecule have a) in the plane of the nuclei, b) perpendicular to the molecular plane? c) Classify them by their symmetry type.Using symmetry determine how many vibrational modes the following species have and how many and which are IR active. Show procedures and calculations. a) CS2
- My professor said if there is a shift in the dipole moment it's IR active. I got C and D as IR Active. I got A, B, E, and F as Raman since there is no dipole moment. They all cancel out. Is that correct? I know the F is also a forbidden transition.Vibrational frequency of iodine molecule Br2 is 414 cm^-1. Calculate ratio populations of 1st excited to ground vibrational states in Br2
