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8/19/2019 Complexation Equilibria and Coordination Chemistry Chem 17 Handout New Part 2
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CoordinationNumber Geometry Example
2 linear Ag[NH3)2]+
4 tetrahedral [Zn(CN)4]2-
4 square planar [Ni(CN)4]2-
5 trigonalbipyramid
Fe(CO)5
5 Square
pyramidal
[Ni(CN)5]3-
6 octahedral [Fe(CN)6]4-
•
• ,
8/19/2019 Complexation Equilibria and Coordination Chemistry Chem 17 Handout New Part 2
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8/19/2019 Complexation Equilibria and Coordination Chemistry Chem 17 Handout New Part 2
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8/19/2019 Complexation Equilibria and Coordination Chemistry Chem 17 Handout New Part 2
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C C
()
•
.
• – C2(3)4B2 B2(3)4C2
– C B ,
.
8/19/2019 Complexation Equilibria and Coordination Chemistry Chem 17 Handout New Part 2
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(C)
• C2 (3)4B2 B2 (3)4C2
8/19/2019 Complexation Equilibria and Coordination Chemistry Chem 17 Handout New Part 2
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(C)
• ( )
.
• :C(2)6C3 C(2)5CC22 C(2)4C2C222
• () .
8/19/2019 Complexation Equilibria and Coordination Chemistry Chem 17 Handout New Part 2
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(C) C(2)6C3 CC(2)5C2
.2 CC2(2)4C
.22
3 C
2 C
, 1 2
1 C
, 2 2
8/19/2019 Complexation Equilibria and Coordination Chemistry Chem 17 Handout New Part 2
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(C)
•
.
• :(3)4C6 C2(3)4C4
•
.
8/19/2019 Complexation Equilibria and Coordination Chemistry Chem 17 Handout New Part 2
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(C)
(3)4C6
C2(3)4C4
8/19/2019 Complexation Equilibria and Coordination Chemistry Chem 17 Handout New Part 2
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(C)
•
. C C
2
• :
C(2)(3)5C2 . C(2)(3)5C2 –
.
8/19/2019 Complexation Equilibria and Coordination Chemistry Chem 17 Handout New Part 2
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(C)
C(2)(3)5C2 C(2)(3)5C2
Co
H3N
H3N NH3
NH3
O
NH3
2+N
O
Co
H3N
H3N NH3
NH3
NH3
2+O
N
O
8/19/2019 Complexation Equilibria and Coordination Chemistry Chem 17 Handout New Part 2
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•
.
• C .
8/19/2019 Complexation Equilibria and Coordination Chemistry Chem 17 Handout New Part 2
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•
.
•
()
().
• .
8/19/2019 Complexation Equilibria and Coordination Chemistry Chem 17 Handout New Part 2
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C2(3)2 C2(3)2
8/19/2019 Complexation Equilibria and Coordination Chemistry Chem 17 Handout New Part 2
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•
C A2B2C2
:
•
•
•
8/19/2019 Complexation Equilibria and Coordination Chemistry Chem 17 Handout New Part 2
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()
8/19/2019 Complexation Equilibria and Coordination Chemistry Chem 17 Handout New Part 2
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()
8/19/2019 Complexation Equilibria and Coordination Chemistry Chem 17 Handout New Part 2
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()
8/19/2019 Complexation Equilibria and Coordination Chemistry Chem 17 Handout New Part 2
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()
8/19/2019 Complexation Equilibria and Coordination Chemistry Chem 17 Handout New Part 2
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() ()
() ()
3
8/19/2019 Complexation Equilibria and Coordination Chemistry Chem 17 Handout New Part 2
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•
.•
()
.
8/19/2019 Complexation Equilibria and Coordination Chemistry Chem 17 Handout New Part 2
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• :
()
8/19/2019 Complexation Equilibria and Coordination Chemistry Chem 17 Handout New Part 2
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•
. –
.
8/19/2019 Complexation Equilibria and Coordination Chemistry Chem 17 Handout New Part 2
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() ()
• DCC2()2+
() ()
• DCC2()2+
8/19/2019 Complexation Equilibria and Coordination Chemistry Chem 17 Handout New Part 2
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8/19/2019 Complexation Equilibria and Coordination Chemistry Chem 17 Handout New Part 2
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• C(2)3(3)3
• D – () () ()
– () () ()
• D – ()
–
() ()
8/19/2019 Complexation Equilibria and Coordination Chemistry Chem 17 Handout New Part 2
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• C
(2)63+
(2)62+
(2)62+
(2)62+
(2)62+
8/19/2019 Complexation Equilibria and Coordination Chemistry Chem 17 Handout New Part 2
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B &
,
. C,
.
,
.
,
.
8/19/2019 Complexation Equilibria and Coordination Chemistry Chem 17 Handout New Part 2
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A
,
.
,
.
,
,
;
.
8/19/2019 Complexation Equilibria and Coordination Chemistry Chem 17 Handout New Part 2
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,
8/19/2019 Complexation Equilibria and Coordination Chemistry Chem 17 Handout New Part 2
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• C
.
• C .
• , C
•
8/19/2019 Complexation Equilibria and Coordination Chemistry Chem 17 Handout New Part 2
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• C
8/19/2019 Complexation Equilibria and Coordination Chemistry Chem 17 Handout New Part 2
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8/19/2019 Complexation Equilibria and Coordination Chemistry Chem 17 Handout New Part 2
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C
• ,
, , . –
( , , ) 2 ( ).
• A ( )
:
1. ()
2. A (2).
8/19/2019 Complexation Equilibria and Coordination Chemistry Chem 17 Handout New Part 2
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• .
• 2
2
2
• , , .
• , , 2
• , , .
8/19/2019 Complexation Equilibria and Coordination Chemistry Chem 17 Handout New Part 2
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8/19/2019 Complexation Equilibria and Coordination Chemistry Chem 17 Handout New Part 2
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8/19/2019 Complexation Equilibria and Coordination Chemistry Chem 17 Handout New Part 2
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•
C ∆.
• ∆ .
∆
8/19/2019 Complexation Equilibria and Coordination Chemistry Chem 17 Handout New Part 2
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8/19/2019 Complexation Equilibria and Coordination Chemistry Chem 17 Handout New Part 2
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C C
3+
(
6
)
8/19/2019 Complexation Equilibria and Coordination Chemistry Chem 17 Handout New Part 2
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8/19/2019 Complexation Equilibria and Coordination Chemistry Chem 17 Handout New Part 2
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C •
.
– .
–
• C,
–
•
,∴
. D
, ∴
.
8/19/2019 Complexation Equilibria and Coordination Chemistry Chem 17 Handout New Part 2
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43
• ,
( )
• , ( )
8/19/2019 Complexation Equilibria and Coordination Chemistry Chem 17 Handout New Part 2
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8/19/2019 Complexation Equilibria and Coordination Chemistry Chem 17 Handout New Part 2
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Complex Ion Wavelength of
Light Absorbed
(nm)
Color of Light
Absorbed
Color of
Complex
[CoF6]3+ 700 Red Green
[Co(C2O4)3]3+ 600, 420, Yellow, violet Dark green
[Co(H2O)6]3+ 600, 400, Yellow, violet Blue-green
[Co(NH 3)6]3+
475, 340 Blue,ultraviolet
Yellow-orange
[Co(en) 3]3+ 470, 340 Blue, ultraviolet Yellow-orange
[Co(CN) 6]3+ 310 Ultraviolet Pale yellow
400 500 600 800
&
8/19/2019 Complexation Equilibria and Coordination Chemistry Chem 17 Handout New Part 2
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, &
•C
M
222
M
22 2
M
2
22
. ∆∆∆∆
∆∆∆∆
∆∆∆∆
∆∆∆∆ 8
( )
.., 2+, 2+, +, 3+
8/19/2019 Complexation Equilibria and Coordination Chemistry Chem 17 Handout New Part 2
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8/19/2019 Complexation Equilibria and Coordination Chemistry Chem 17 Handout New Part 2
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C C
8/19/2019 Complexation Equilibria and Coordination Chemistry Chem 17 Handout New Part 2
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C C
• B
– •
34 4 4
4, 4, 3
4, 4, 4
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Coordination
Number Geometry
Metal
Hybridization Example
2 linear sp Ag[NH3)2]+
4 tetrahedral sp3 [Zn(CN)4]2-
4 square planar dsp2 or sp2d [Ni(CN)4]2-
5 trigonal
bipyramid dsp3
Fe(CO)5
5 Square
pyramidal d2sp2
[Ni(CN)5]3-
6 octahedral d2sp3 or sp3d2 [Fe(CN)6]4-
8/19/2019 Complexation Equilibria and Coordination Chemistry Chem 17 Handout New Part 2
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C
8/19/2019 Complexation Equilibria and Coordination Chemistry Chem 17 Handout New Part 2
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C
• 46.
()• , ,
?
• 6 .
• 5 .
• 32 .
C
8/19/2019 Complexation Equilibria and Coordination Chemistry Chem 17 Handout New Part 2
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C
• (3)6C2.
()
• , ,
?
• 6 .
• 1
• 23 .
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