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- Consider phosphorus pentafluoride, PF5, D3h symmetry. The reducible representation for the 18 degrees of freedom is: A'1= 2 A'2= 1 E'= 4 A''1=0 A''2=3 E''=2 and given.. E=? 2C3(z)= 0 3C'2= -2 σ h(xy)=4 2S3= -2 σ v(yz)=4 what is E? 1.) What are the symmetry labels for the rotational modes? 2.) What are the symmetry labels for the translational modes? 3.) What are the symmetry labels for the vibrational modes? 4.) How many vibrational modes are present in this molecule? 5.) Which modes are IR active and Raman active? How many peaks expected for each spectrum and why?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.The structure of [NO3]-is either trigonal planar or trigonal pyramidal draw both possible structures and determine the point group for each. Which irreducible representations represent the translational and rotational modes for each possible structure of [NO3]-? Which irreducible representations correspond to the vibrational modes for each possible structure of [NO3]-? How many degrees of freedom would you expect for each structure of [NO3]-? Calculate T-vibrationaland determine which modes you expect to be IR active for each structure.
- 1.Consider an XeOCl4 molecule. a) Determine the point group of the molecule. b) Determine a hybridization of the Xe atom. c) Determine a symmetry of the vibrational modes of the molecule. Please answer completelyBy drawing the open structures of the following molecules, the inversion center (i) and rotation-reflection examine whether it has the transaction (Sn) or not. a) CO2 b) C2H2 c) BF3 d) PCl3 e) PCl5To which point group of symmetry does the bromobenzene molecule belong? a) Cs. b) C2. c) C2v. d) D6h.
- What is the difference between a symmetry element and a symmetry operations in symmetry and group theory. I understand that C2 axis is a symmetry element or the inversion centre i is. I am confused whether an improper axis S4 for example is its own unique symmetry element? Is it not just a combination of C4 and sigmah (Couldn't find the sigma symbol.)Why is spin-pairing so common a features of bond formation (in the context of valence-bond theory)? Please answer ASAP in detail3. Deduce the nuclear spin degeneracies of Jodd and Jeven rotational levels of a. 12C2 (x1E+g ground electronic state) b. 13C2 (x1E+g ground electronic state) c. 12C2 (b1E-g excited electronic state) d. 12C13C (b1E-g excited electronic state)
- define the ground term for the configuration d8 (Oh symmetry). Please provide solution. Thank you.consider the 3 internal stretching motions of the formaldehyde molecule symmetry (i.e. not translations and rotations). using the symmetry operations,obtain the characters of the reducible 3 dimensional matrix representation of these stretching motions1- Draw the open structures of the following molecules and examine whether they have an inversion center (i) and a rotation-reflection process (Sn). a) CO2 b) C2H2 c) BF3 d) PCl3 e) PCl5