Download Molecular Shapes

Molecular Shapes
A Look at the Geometry of Some
Molecules
Domains
Sets of electrons that are either
bonded or unbonded
VSEPR
Valence Shell Electron Pair Repulsion
Theory
Electron pairs (either bonded or unbonded)
will attempt to get as far apart from each
other as possible.
1 bonding domain, H2 H H
VSEPR TYPE: A2
Bond Angle: 180°
Shape: Linear
Two bonding domains, CO2
180
°
VSEPR TYPE: AB2
Bond angle: 180°
Shape: Linear
O C O
Three bonding domains, BBr3
Br B Br
120
°
VSEPR TYPE: AB3
Bond angle: 120°
Shape: trigonal planer
Br
Four bonding domains, CH4
109.5
°
VSEPR TYPE: AB4
Bond angle: 109.5°
Shape: tetrahedral
H
H
C H
H
Four domains, NH3
three bonding, one nonbonding
H
N H
H
<109.5
°
VSEPR TYPE: AB3E
Bond angle:
Shape:
trigonal pyramid
<109.5°
Four domains, H2O
Two bonding, two nonbonding
H O H
<109.5
°
VSEPR TYPE: AB2E2
Bond angle:
Shape:
Bent
<109.5°
Sulfur dioxide, SO2
S
O
O
Number of domains?
Angles?
Number of bonding domains?
Number of non-bonding domains?
3
120
°2
1
Shape?
Bent
Five bonding domains, PF5
F F
F P
F
F
Shape: trigonal bipyramid
Bond angle: ?,?
Six bonding domains, SF6
F
F
F
S
F
F
F
Bond angle: ?,?
Shape: octahedral
Other
Molecular
Shapes