Resonance Structures
Resonance
Same Structure Can be drawn in Multiple formats
[NO3]-
Nitrate Ion
Resonance
Same Structure Can be drawn in Multiple formats
[NO3]-
Nitrate Ion
O N O
O
Resonance
Same Structure Can be drawn in Multiple formats
[NO3]-
Nitrate Ion
O N O
O
Resonance
Same Structure Can be drawn in Multiple formats
[NO3]-
Nitrate Ion
O N O
O
Resonance
Same Structure Can be drawn in Multiple formats
SO3 Sulfur Trioxide
Not the Suflite ion = [SO3]2-
Resonance
Same Structure Can be drawn in Multiple formats
SO3 Sulfur Trioxide
Resonance
Same Structure Can be drawn in Multiple formats
[CO3]2- Carbonate
Resonance
Same Structure Can be drawn in Multiple formats
[CO3]2- Carbonate
Resonance
Same Structure Can be drawn in Multiple formats
•We draw all the possible Lewis Structures and
use a two-sided arrow to show resonance.
•The actual molecule is NOT ANY OF the drawn
pictures.
•The actual molecule is a combination of the three
images blended together.
•We know this because the length of double and
single bonds differs but in these molecules, the
bond lengths are the same (via x-ray diffraction).
•Single Lewis Structures are Inadequate!
Assignment
Same Structure Can be drawn in Multiple formats
Draw Resonance Structures for
•Sulfite (Polyatomic Ion)
•Ozone molecule
•Phosphate Ion (check the FC!)