Review: Linear Combinations of Atomic Orbitals (LCAO's)
Question 1
Give an appropriate set of LCAO's for a square pyramidal sp3d geometry assuming:
- The axial-base angle = 90° [Solution]
- The axial-base angle > 90° [Solution]
Symmetry Adapted Linear Combinations (SALCs)
Question 1
For the following molecules determine the symmetry labels for the SALCs:
- PdCl42- (square planar) [Solution]
- SiCl4 [Solution]
- cis-PtF2Cl22- [Solution]
- SF6 [Solution]
Question 2
For the following molecules draw a picture of each SALC:
- PdCl42- (square planar) [Solution]
- SiCl4 [Solution]
- cis-PtF2Cl22- [Solution]
- SF6 [Solution]
Molecular Orbital Diagrams (σ-bonding)
Question 1
For the following molecules construct an MO Diagram to describe the σ-bonding:
- trans-SF2Cl4 [Solution]
- NH4+ [Solution]
- SF6 [Solution]
Molecular Orbital Diagrams (π-bonding)
Question 1
For the following molecules construct an MO Diagram to describe the π-bonding:
- SiF4 (s,px,py,pz orbitals used for σ-bonding) [Solution]
- GeH2Cl2 (s,px,py,pz orbitals used for σ-bonding) [Solution]
- SnCl62- (s,px,py,pz, dz2, dx2-y2 orbitals used for σ-bonding) [Solution]
Question 2
For PtCl42- (square planar), s, px, py and dx2-y2 are used for σ-bonding. Construct an MO Diagram to describe the π-bonding:
- for π-bonding perpendicular to the plane [Solution]
- for π-bonding parallel to the plane [Solution]
|