Molecular Shapes

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Chapter 9.4 Molecular Shapes
Mr. Miller - Chemistry Academic
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VSEPR Model
V S E P R
alence
hell
lectron
VSEPR is based on an arrangement that minimizes
the repulsion of shared and unshared pairs of
electrons around the central atom
air
epulsion
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VSEPR Model
Number of pairs on the central atom.
Number of pairs being shared in sigma bonds.
Number of pairs not bonding.
3-D model and name.
Bonds are this far apart.
Which orbitals mix to form bonding orbitals.
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VSEPR Model
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VSEPR Model
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VSEPR Model
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VSEPR Model
How to figure out the shape of your molecule 1.
Draw Lewis structure 2. Count total pairs on
central atom 3. Determine how many shared lone
pairs 4. Consult your mental chart!
How to find out the hybrid orbitals 1. Draw Lewis
structure 2. Count total pairs on central atom 3.
2sp 3sp2 4sp3 5sp3d 6sp3d2
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VSEPR Model

• CS2
• CH2O
• CCl2F2
• PCl3
• C2H4

• H2S
• NCl3
• NO3-
• ClO3-
• IF4-