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Chapter 6

CHEM 2OA3 Chapter Notes - Chapter 6: Nucleophile, Electrophile


Department
Chemistry
Course Code
CHEM 2OA3
Professor
Paul Harrison
Chapter
6

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Chapter 6: Chemical Reactivity and Mechanisms
6.1 Enthalpy
- Enthalpy (ΔH or q)
oabsorbing energy
ousing energy
oElectrons are in a lower energy state when in a bonding MO
-homolytically heterolytically
oHomolytic: 

oHeterolytic:

- Bond dissociation energy (BDE)
 
- Total change in enthalpy = heat of reaction
oExothermic: 
oEndothermic: !
- Reaction Coordinate diagrams
o"#
o$#%&'!
&('
6.2 Entropy ΔS
- Entropy ΔS: )
)!
o*!
o+!!)
))
-
o,)
!

6.3 Gibbs Free Energy ΔG & 6.4 Equilibria
-*!)exergonic
o)-
.
o(!/()0
-
1)
-
!
-2!#)endergonic
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6.5 Kinetics
- Kinetics
o%-!!
- Rate of reaction =!

o345#6#6
o10!
Concentration of reactants: 
!
Activation energy: -
5%)!%

Temperature: !7 average 
,8

,!69:

Geometry and steric: 
Presence of a catalyst: 

;!8
-0
- Rate Law Equations
oRate = k [A]X[B]Y
oOrder (X,Y)<=08
;%>%, +*%;%"2%,+ %*>155$
6.6 Kinetics vs Thermodynamics
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