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Crystal Field Theory - Coggle Diagram
Crystal Field Theory
Colour absorbtion of co3+
[Co(H2O)6]3+
Wavlength of light abosorb
600,400
Colour of light abosorb
yellow,violet
Colour of complex
blue green
[Co(NH3)6]3+
Wavlength of light abosorb
475,340
Colour of light abosorb
blue, ultraviolet
Colour of complex
yellow-orange
[Co(C2O4)3]3+
Wavlength of light abosorb
600,420
Colour of light abosorb
yellow,violet
Colour of complex
dark green
[Co(en)3]3+
Wavlength of light abosorb
470,340
Colour of light abosorb
blue,ultra violet
Colour of complex
yellow-orange
[Cof6]3+
Colour of light abosorb
Red
Colour of complex
Green
Wavlength of light abosorb
700
[Co(CN)6]3+
Wavlength of light abosorb
310
Colour of light abosorb
ultra violet
Colour of complex
pale yellow
Elecrostatic between metal ion and donor atom
coordinated metal - ligand stabalized
destabalized due to ligand -d repulsion
Seperate metala and high energy ligand
splitting due to octahedral field
LIgand-metal interaction
more directly the ligand attack the metal orbital, the higher the energy of d orbital
In an octahedral field of degeneracy of the five d orbital is lifted
d orbital align along the octahedral axis will be affected the most
ligand approach metal
directly
dz2
dx2-dy2
not directly
dxy
dyz
dxz
octahedral
Weak field < Pe
strong field > P
tetrahedral
small change -> high spin
square planar
ostly d8 (Majority low spin) strong field ligand
