# CHM 501

### Homework 2

#### Due February 29, 2016

1. Identify the irreducible representations for all of the vibrations for [PdCl_{4}]^{2–}. Which of these vibrations are allowed by IR absorption spectroscopy?

2. Determine the irreducible representations of the CO stretching vibrations in Ni(CO)_{4}. Which of these vibrations are allowed by IR absorption spectroscopy?

3. Find the irreducible representations for the σ orbitals in PF_{5}. What is the hybridization on the P atom? What atomic orbitals are used to create the hybrid orbits? Be specific.

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