The following questions deal with BF 3 . 1. In class, we derived the symmetry la

Question

The following questions deal with BF3.

1. In class, we derived the symmetry labels for the outer atoms by breaking down the reducible representation. We also have the labels for the s and p orbitals of the central atom. What outer atom labels result in nonbonding MO's, if any?

2. What orbitals from the central atom become nonbonding MO's, if any?

3. How many total molecular orbitals are there?

4. List the labels for the bonding MO's (primarily fluorine in character) and the antibonding MO's (primarily boron in character).

The following question deals with PH5, a hypothetical molecule with D3h symmetry (trigonal bipyramidal):

5. Using the five s-orbitals on the outer hydrogens as a basis set, what symmetry combinations do you get?

6. What orbitals on the central P (considering only s and p orbitals) does each of these interact with?

Explanation / Answer

Sol; 1) Pzorbital of B
   2) Pz orbital
   3) Four
   4)Sigma pz & Sigma star Pz

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