Electronic spectra of selected metal complexes

In this section, we present some additional spectra in order to illustrate the principles discussed in the previous sections. 

For the octahedral complex, the 4Tig(F) 4A2g should have comparable energy with the observed band. But 4T AF) arises from configuration 44 while 4A2g is from t %eg. So this is a two-electron process and hence the transition is weak. Meanwhile, the 4T o(F) 4T2g transition occurs in the 

This is a d3 complex with a tetragonal structure with /J4h symmetry. (Strictly speaking, this system has /J211 symmetry.) Hence the Orgel diagram shown in Fig. 8.5.5 no longer applies. If we assume this cation has an elongated octahedral 

Tanabe-Sugano diagrams for d2, d3. and d8 octahedral complexes. Quantities B and C are Racah parameters, in terms of which the energy of a spectroscopic term is expressed. Hence both EIB and Dq/B are dimensionless. 

Tanabe-Sugano diagrams for d4-d7 octahedral complexes. Both E/B and Dq/B are dimensionless. 

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