1. MOLECULAR SHAPE
HOW DOES SHAPE AND POLARITY DETERMINE FUNCTION AND PROPERTIES OF MOLECULES?

2. VSEPR THEORY VALENCE SHELL ELECTRON PAIR REPULSION
Predicts the shape of molecules and ions in which valence shell electron pairs are arranged about each atom so that they are kept as far away as possible, thus minimizing electron-pair repulsion

3. HOW DO WE DETERMINE SHAPE?
Draw Lewis dot diagrams
Determine how many bonding pairs
Determine how many lone pairs
Use VSEPR to arrange atoms
Draw structure
Let’s try CCl4

4. VSEPR

5. GEOMETRY

6. WHAT IS POLARITY?
Polarity depends on the type of bond and shape of molecule.
Any molecule that has a net separation of charge (dipole moment)
Ionic bonds: Polar
Covalent Bonds:
Nonpolar-nonpolar
Polar-depends on shape

7. How do we determine polarity?
Determine bond type
Determine Shape
Draw arrows showing direction of poles
If arrows cancel each other out: NONPOLAR
If arrows go toward one direction: POLAR