control of structure
Post on 25-Feb-2016
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Control of Structure
Why do elements and compounds adopt one structure as opposed to
another?
Thermodynamics Review:
G = H - TS
Bond Strength
Favored by strong bonds.
Freedom of Movement
Favored by more particles.
Temperature Control?
Thermodynamics Review:
G = H - TS
Bond Strength
Favored by strong bonds.
Freedom of Movement
Favored by more particles.
Example: Cl-Cl vs. Cl Cl
Cl-Cl bond strength = 242 kJ/molSo (Cl) = 165 J/KmolSo (Cl2) = 223 J/Kmol
Bonding Concerns and Trends:
Number of bondsType of bonds: sigma vs. pi
Number of Bonds Possible: F, O
Number of Bonds Possible: N, C
Lewis Base Activity Expands # Bonds
sigma vs. pi bonding: Lewis structure examples
Shapes of sigma and pi bonds
sigma vs. pi bonding: shapes, strength and trends
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