Chemistry · Chapter 8

Hybrid Orbitals: Mixing s and p

Pick a recipe and watch the lobes appear and spread apart. Then pick a molecule and let the count of regions of electron density name its hybrid set for you.

The hybrid set teal = big lobe · gold = back lobe

sp3 tetrahedral angle 109.5 degrees pale lobes are leftover p orbitals

The recipe

4hybrid orbitals out 25% s

Pick a set above.

Choose a recipe

Atomic orbitals in4
Hybrid orbitals out4
s character25%
p character75%
p orbitals left over0
Shape of the settetrahedral
ExampleCH4

Now count a molecule

4sigma bonds
0lone pairs
4regions
sp3tetrahedral

Four regions need four hybrid orbitals, so the central atom is sp3.