Chemistry Exam #3

Paramagnetic

Attracted to a magnet and at least one unpaired electron

Diagmagnetic

Not attracted to a magnet and every electron is paired

Valence Bond Theory (VBT)

Orbital overlap forms bond

Orbital Hybridization

Atomic orbitals combine to form new hybrid orbitals that explain observed molecular geometry

Cis Configuration

“On the same side”

Trans Configuration

“On the other side” or “across”

If the Lewis Structure has 2 electron groups, what is the hybridization?

sp

If the Lewis Structure has 3 electron groups, what is the hybridization?

sp²

If the Lewis Structure has 4 electron groups, what is the hybridization?

sp³

If the Lewis Structure has 5 electron groups, what is the hybridization?

sp³d

If the Lewis Structure has 6 electron groups, what is the hybridization?

sp³d²

Molecular Orbital Theory

Shared electrons deionize and belong to the molecule rather than individual atoms form bonding MOs (lower energy) & antibonding MOs (higher energy)

Bond Order (BO)

NO starred - starred / 2

How do you determine if a molecule is stable in the molecular orbital theory?

If you have a positive BO it is stable, if the BO is negative or zero it is unstable