Chem231 - Inorganic - Spring 2008 - problem set 1.

LEVEL 1 PROBLEMS

1. Point group is C2v.

2.a) Point group is C2v.

b) Atoms Cla and Clb are equivalent by the C2 axis and by the blue mirror plane.The same is true for equivalent Hb's.

3. (a) Trans isomer is C2h while the cis isomer is C2v

(b) C3h

4. A, D and E have the same point symmetry: D3h.

B and C have the same point symmetry: D3d (you did C in the symmetry workshop).

LEVEL 2 PROBLEMS

1. Adamantane has the same symmetry as methane! Td = tetrahedral.

2. click here

3. (a) this will surprise you: Th !!! (b) Td !!! The secret is to see the C3 axes at the vertices in both structures. Click to see.