1. 9-6 VSEPR (Sections 12.8, 12.9, 12.10)
And you

2. The VSEPR (Valence Shell Electron Pair Repulsion) Model is useful in predicting the 3D shapes of molecules. The main idea of the model is that electron pairs on the central atom, either bonding or nonbonding, will repel each other to maximize the distance between them. In other words, the electron regions (bonding or nonbonding) on the central atom move as far apart as possible.
Use your “shape sheet” (p3) for the table

3. The convention to show 3D bonds
In plane of paper = line
Out of plane (toward you) = Wedge (dark triangle)
Behind the plane (into the paper) = dashes

4. BeI2
Bonding e- pairs (on central atom): Non-bonding e- pairs: Geometry of central atom: 3D shape: Bond angles: 2
Linear
180o

5. BCl3
Bonding e- pairs (on central atom): Non-bonding e- pairs: Geometry of central atom: 3D shape: Bond angles: 3
Triangular (trigonal) plane
120o

6. CH4
Bonding e- pairs (on central atom): Non-bonding e- pairs: Geometry of central atom: 3D shape: Bond angles: 4
Tetrahedron
109.5o

7. PBr5 Bonding e- pairs (on central atom): 5 Non-bonding e- pairs:
Geometry of central atom:
3D shape:
Bond angles: 5
Trigonal bipyramidal
90o and 120o

8. SCl6 Bonding e- pairs (on central atom): Non-bonding e- pairs:
Geometry of central atom:
3D shape:
Bond angles: 6
Octahedron
90o

9. PH3 Bonding e- pairs (on central atom): Non-bonding e- pairs:
Geometry of central atom:
3D shape:
Bond angles:
*note 107<109.5 because unbound e-s take up more space than bound e-s
3 (4 regions) 1
Trigonal pyramidal
(triangular pyramid)
~107o

10. H2S Bonding e- pairs (on central atom): Non-bonding e- pairs:
Geometry of central atom:
3D shape:
Bond angles:
*note 104.5<120 as unbound e-s take up more space than bound e-s
2 (4 regions) 2
Bent (angular)
~104.5o