CHEM 360
Spring, 2004
Shapes of molecules and ions
Number
of central atom electron pairs
|
Bonding
pairs
|
Non-bonding
pairs
|
Shape
|
Example
|
2
|
2
|
0
|
Linear
|
BeCl2
|
3 |
3
|
0
|
Triangular
|
BF3
|
3
|
2
|
1
|
Bent
|
SnCl2
|
4
|
4
|
0
|
Tetrahedral
|
CCl4
|
4
|
3
|
1
|
Pyramidal
|
NH3
|
4
|
2
|
2
|
Bent
|
H2O
|
5
|
5
|
0
|
Trigonal bipyramidal (tbp)
|
PF5
|
5
|
4
|
1
|
Pseudo-tdp
|
BrF4+
|
5
|
3
|
2
|
T-shaped
|
BrF3
|
5
|
2
|
3
|
Linear
|
XeF2
|
6
|
6
|
0
|
Octahedral
|
SF6,PF6-
|
6
|
5
|
1
|
Square pyramidal
|
IF5
|
6
|
4
|
2
|
Square planar
|
XeF4,IF4-
|