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Lecture 5

CHEM 1A03 Lecture Notes - Lecture 5: Partial Charge, Trigonal Planar Molecular Geometry, Square Planar Molecular Geometry


Department
Chemistry
Course Code
CHEM 1A03
Professor
David Brock
Lecture
5

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
Ionic Bonding
-
-
o
-strength lattice enthalpy
o !
"!"
Covalent Bond
-#"  shared
-$!"
- " !
Lewis Structures
o%"%"&!

o$""
- Coordinate covalent bond"&!
!
o$"'(
Bond Polarity
-&!)
-*!""("
+
-"&
Percent
Ionic Character
-,& 
o- 
o&"

o.,0 to 0.4 pure
covalent or very weakly polar
covalent
o0.4 to 1.9 polar covalent
-/,&
o!
o0
o.,1.9 or more " ionic compounds

Only pages 1-2 are available for preview. Some parts have been intentionally blurred.

-0!&&12
"!& ,!
!
Electrostatic Potential Maps
-.",!
" "

-"
 &
12"&1!2
- NaCl 
3!
- HCl – 
'!
" '!
!3"&
- Cl2&!
 3"&
Lewis Structures
-"4where bonding and non-bonding electrons are
locatedwhere resulting formal charges are
situated
Rules for Drawing Lewis Structures
o&
!%
o*1&25!1(&2
o0&" !
o%12
- &
H and F are always terminal
o!6!%
o7"
o!4
o0
o*&"
"!
Group 2A, 3A can have an octet or less than 8
o8

FC = (GROUP A # - # NON-BONDING ELECTRONS - #
BONDS)
$add up to net charge
$9"&&"
&!"&
:;<cannot&=
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