nov 14 inked - university of massachusetts...

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

2

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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6

Crystal Field Splitting in Td

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7

Crystal Field Splitting in Td

LGOs for -bonds are A1+T2 representations.

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8

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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