em $720$

Final Exam

name:

Mohammed Alomari

$\frac{1}{2}\frac{?}{2024}$

The molecule $xe{F}_4$ belongs to the point group $D_{4h}.$ The displacements of the atom span $A_{1g}+A_{2g}+B_{1g}+B_{2g}+E_g+2A_{2u}+B_{2u}+3E_u.$

How many normal modes of vibration are there for the molecule?

What are the symmetry species of the normal modes of vibration?

Which of the normal modes are infrared active?

Which of the normal modes are Raman active?

Which of the normal modes are neither IR nor Raman active?

The $C_1$ axes coincide with the $x-$ and $y-$axes; the $$ planes coincide with the $x$ t$-$ and $yz-$planes.