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UMass Amherst Created by Karsten Theis
Chem 341
Coordination Chemistry - BondingChapter 10: pp 388-389 (only s bonding); 395-399; 399-402
(through Fig 10.29b)HW: catchup….
Goals: Memorize spectrochemical series; Predict d-orbital splittings in distorted geometries; -bonding in Td symmetry;
t = (4/9) o
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Axial elongation: Oh D4h
The axial ligands of a Cu2+ are ‘pulled’ away, to lead to a D4h symmetry. Which d-orbital holds the upe?
a) xyb) xzc) yzd) x2-y2e) z2
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3
Axial elongation: Oh D4h
The axial ligands of a Cu2+ are ‘pulled’ away, to lead to a D4h symmetry. Which d-orbital holds the upe?
x2-y2
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4
Select the correct d-orbital splitting diagram for square-planar geometry
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5 ...
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Crystal Field Splitting in Td
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Crystal Field Splitting in Td
LGOs for -bonds are A1+T2 representations.
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Fig. 10.20 – important stuff
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9
Spectrochemical Series: largely pi-bonding!
CO, CN- > phen, bpy > NO2- > en > NH3 > NCS-> H2O > F- > RCO2- > OH- > Cl- > Br- > I-
-acceptors > -only ligands > -donors Strong field > weak field Large …… Small
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