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- A symmetry is a transformation that leave an object _______________________. Unchanged Disfigured Folded unevenly upon itself SquaredMy 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.Under C4v symmetry, which irreducible representations, if any, correspond to an IR active vibration and which ones correspond to a Raman active vibration? And which ones correspond to an IR active vibration under D2h symmetry?
- Write the miller indices of the crsytallographic plane shown:determine:(i) the point group to which thiophene (C 4 H 4 S) belongs;(ii) the number of internal degrees of freedom for thiophene;(iii) the irreducible representation for thiophene;(iv) the number of IR active C-H stretching modes for thiophene;(v) the number of Raman active C-H stretching modes for thiophene.define the ground term for the configuration d8 (Oh symmetry). Please provide solution. Thank you.
- What point groups result from the combination of two mirror planes oriented at 90° with respect to one another? Repeat for 60°, 45°, and 30°.Determine the planar density for the following vectors and structures in 1/nm2: a. (1 0 0), gold b. (1 1 1), molybdenum c. (0 2 1), leadDetermine the number (and relative intensity) of IR-active C–O stretching vibrations for fac-[Mo(CO)3(NCMe)3]: Proceed as follows... Determine the point group of the molecule. Do not descend in symmetry. Construct a reducible representation for the CO vibrations (ΓCO) -- [please explain how to determine the number of unshifted atoms] Decompose ΓCO into its irreducible representation ΓCO,i.r. Determine which are IR active (number of IR active modes) Double degenerate modes (i.r. with E symmetry) are ≈ twice as intense as other modes, and triply degenerate modes (i.r. with T symmetry) are ≈ three times as intense.