1. VSEPR Theory
You will be able to determine the shapes of covalent molecules from correct Lewis Dot structures.

2. VSEPR Valence Shell Electron Pair Repulsion Theory
The 3D shapes of molecules can be predicted if we assume that electron pairs stay as far apart as possible.

3. 2 electron clouds
Linear; 2 Bonded Pairs (BP)

4. 3 electron clouds
Trigonal planar; 3 BP

5. 4 electron clouds
Tetrahedral; (4BP)

6. 4 e clouds (cont)
Trigonal pyramidal; 3 BP, 1 NonBonded Pair (NBP)

7. 4 e clouds cont
Bent or angular or nonlinear; 2 BP, 2 NBP

8. 5 electron clouds
Trigonal bipyramidal; 5 BP

9. See-saw; 4 BP, 1 NBP

10. T-shaped; 3 BP, 2 NBP

11. Linear; 2 BP, 3 NBP

12. 6 electron clouds
Octahedron; 6 BP

13. Square pyramidal; 5 BP, 1 NBP

14. Square planar; 4 BP, 2 NBP

15. Practice
BI3
#BP =
#NBP =
Total e clouds =

16. ICl3
BP# =
NBP # =
Total e clouds =

17. CCl4
BP# =
NBP # =
Total e clouds =