Molecular Shape

1
Molecular Shape

• Sect 9.4

2
VSEPR Model

• Valence Shell Electron Pair Repulsion
• Electron pairs will position themselves to
  minimize repulsion
• Vocabulary
• Central atom
• Has the least attraction for shared electrons
• Located in center of molecule
• Bond angle
• Angle formed by two terminal atoms and the
  central atom

3
Bond Angles

• Bond angles depend on whether electron pairs are
  shared or are lone pairs.
• Lone pairs take up more space than shared pairs,
  thus pushing shared pairs closer together.

4
Common Shapes

• Linear
• Trigonal planar
• Tetrahedral
• Trigonal pyramidal
• Bent
• Trigonal bipyramidal
• Octahedral

5
Hybridization

• A process in which atomic orbitals are mixed to
  form new, identical hybrid orbitals