CH622 - Electronic Spectrae of Complexes Flashcards
Revise theoretical background. (18 cards)
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Electronic transitions between states with different spin multiplicities.
Spin Forbidden
Ground state will have the _____spin multiplicity.
Largest
If thesame spin multiplicity, then the GS will have the highest value of L.
In Oh and D4h , all d orbitals are gerade and so too are the states arising from their d configurations. Thus, their electronic transitions between them are________.
Laporte Forbidden
If a system is centrosymmetric, electronic transitions between states with the same inversion symmetry (g –> g, u –> u) are forbidden, but transitions between states of different inversion symmetry
(g –> u, u –>g) are allowed.
Laporte’s Rule
Idenifty the gaseous ground state term symbol for a d2 metal ion.

<strong>3</strong>F

Idenifty the strong field region of the
d5 Tanabe-Sugano Diagram.


Low Spin Configurations
Idenifty the weak field region of the
d5 Tanabe-Sugano Diagram.


High Spin Configurations
Determine ML and MS vaules of the free ions term below:
2D
D: L=2 ML={-2,-1,0,1,2}
2S+1=2 –> S=1/2 –> MS= {1/2,-1/2}