CH511 Problem Set 3 rev2

 

1.     Invent a structure or shape that has the point group symmetry C4.

2.    What is the point group symmetry of a tennis ball (including laces)? Explain.

*3.    Calculate and compare the weight percent and density of the hydrogen stored in (a) H2 gas at 2500 psi, (b) H2 liquid, (c) PdH solid.

4.    Use simple MO theory for sigma bonding to explain why I3- is has D∞h symmetry, but I3+ is C2v.

5.    Using SALC of the s and p ligand orbitals in a C4v molecule, sketch the symmetry-allowed interactions with central atom s and p orbitals. Label each with the appropriate symmetry term.  Provide the symmetry labels for similar interactions in a square planar molecule.

6. When starting with Oh, Td, and square planar coordinations, for each case, what are all possible symmetries where we have 2 bonds longer than the others? How about if 3 bonds are longer than the others?

7.  Shriver/Atkins Problem 8.8 (p. 236)