1. Lecture /09/05

2. Draw Lewis Dot structures
CO2 N2
CH3OH
H3PO4

3. Isoelectronic molecules: same number of valence electrons and same Lewis structure

4. Is the acetylide, C22-, isoelectronic with N2?

5. Draw Lewis Structure for O3

6. Resonance Resonance structures Resonance hybrids
Bonding in a molecule when a single Lewis structure fails to describe accurately the actual electronic structure
Resonance structures
Alternative structures
Equal energy and bonding pattern
Resonance hybrids
Composite of the equivalent resonance structures

7. Radicals: molecules with odd number of electronsNO OH
NO2 Cl