15-bonding - 1 Week 6 CHEM 1310 - Sections L and M 1...

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Unformatted text preview: 1 Week 6 CHEM 1310 - Sections L and M 1 Bonding: General Concepts More on Lewis Structures Formal Charges Resonance Breakdown of the Octet Rule VSEPR Theory Steric Number Chapter Review Week 6 CHEM 1310 - Sections L and M 2 Formal Charges For some compounds, there are different Lewis structures possible. How can we tell which is the correct Lewis structure? Consider the formal charge Image from chemprofessor.com 2 Week 6 CHEM 1310 - Sections L and M 3 Formal Charge Formal Charge = # valence e- on free atom- # valence e- assigned to the atom in the molecule # valence e- assigned to the atom in the molecule = # lone pair e- + 0.5 x (# shared e- ) Week 6 CHEM 1310 - Sections L and M 4 Formal Charge Formal Charge = # valence e- on free atom- # valence e- assigned to the atom in the molecule # valence e- assigned to the atom in the molecule = # lone pair e- + 0.5 x (# shared e- ) What is the formal charge on Nitrogen in this compound? 2 Week 6 CHEM 1310 - Sections L and M 3 Formal Charge Formal Charge = # valence e- on free atom- # valence e- assigned to the atom in the molecule # valence e- assigned to the atom in the molecule = # lone pair e- + 0.5 x (# shared e- ) Week 6 CHEM 1310 - Sections L and M 4 Formal Charge Formal Charge = # valence e- on free atom- # valence e- assigned to the atom in the molecule # valence e- assigned to the atom in the molecule = # lone pair e- + 0.5 x (# shared e- ) What is the formal charge on Nitrogen in this compound? 3...
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15-bonding - 1 Week 6 CHEM 1310 - Sections L and M 1...

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