Steps for Using VSEPR Model

1
Steps for Using VSEPR Model

• Valence Shell Electron-Pair Repulsion
• (on page 638 of your book)
• Draw the Lewis Structure
• Count electron pairs (bonds, lone pairs), arrange
  them to minimize repulsions
• Determine positions of atoms
• Name structure from positions of atoms

2
Table 13.8 pg. 641
Linear
Trigonal Planar
Tetrahedral
Trigonal Bipyramidal
Octahedral
3
Square Pyramids

• Top view side view

4
Trigonal Pyramids

• Top View

Tetrahedrons are Trigonal Pyramids with four
equal faces
5
pg. 638
6
Fig 13.17 pg. 640
Bent
7
Possible Molecular Geometries
Linear
Linear
Trigonal Planar
Trigonal Planar
Bent (1 lone pair)
Tetrahedral
Tetrahedral
Trigonal Pyramidal (1 lone pair)
Bent (2 lone pairs)
Trigonal Bipyramidal
See Table 13.10 pg 642
No table in book. Octahedral (0 lone
pairs) Square Pyramid (1 lone pr.) Square Planar
(2 lone pairs)
Octahedral
8
5 Electron Pairs
This document from Dr. Van Koppen, on course
webpage
9
6 Electron Pairs
This document from Dr. Van Koppen, on course
webpage
10
Methanol (CH3OH)
Figure 13.22, pg 650