3. Consider borane, BH3. a) To what point group does it belong? b) Construct a transformation table for the Is orbitals on the three hydrogens and determine the symmetry adapted linear combinations for these orbitals.

Show that any irreducible representation of these point groups is normalized. a C2 b D2d c Oh d C4h e C6v

What do you expect the structure of Ge2H4 to look like ? sketch the structure in a clear three dimensional representation and give it's point group.

Answer all questions: 1. Consider cyclobutadiene molecule (structure is shown below) has a point group Dan. Using LCAO-MO Hückel approximation in answering the following questions: z 3 2 Cyclobutadiene (A) What are the 4 normalized SALCS? (B) What are the MO energies? Show the energy scale. (C) What are the 4 normalized MO wave functions? (D) What is the delocalization energy or stabilization energy (D. E)? (E) Determine the bond order (B. O) between (Cı and C2); and (C2 and C3). (F) Identify the HOMO and LUMO orbitals.

solve first 3 sections please

4. Assign a point group to each of the following: (a) (b) IF5 (c) SiH₂Cl2 (d) SeF2 (e) CIF3

9. Given thee set of operations [E, C4, sigma h]. determine the other operations that must be present to form a complete point group. [Hint: Consider all the products of the given elements with themselves and with each other.] Identify the point group for the complete set of operations. What is the order ?of the group المزيد تعديل حذف المفضلة مشاركة ..

Give all the symmetry elements in the following molecules, and assign the point group of each. a ) Xe(0) F4 b) cyclo-(C5H5) - c) IF 7 (pentagonal bipyramidal) d) Boric acid (right - assume it's rigid)

3. Determine the multiplication table for the Dah point group.

Using VSEPR, determine the point group of SF4. Show your work.