Tanabe-Sugano diagrams, 696-7

Talspeak process, 6, 959,960 Tanabe-Sugano diagrams, 1, 238 Tannic acid in gravimetry, 1, 524 Tanning... 

The figure below abstracts just the spin-triplet part of the Tanabe-Sugano diagram in the previous box. Suppose we have recorded the electronic d-d spectrum of [V(H20)6] and identified two out of the three possible spin-allowed (triplet-triplet) bands at energies 17,200 cm and 25,600 cm ... 

FIGURE 18.5 Simplified Tanabe-Sugano diagrams ford" metal ions in octahedral fields. The drawings have been simplified by omitting several states that have multiplicities that do not permit spin allowed transitions. 

Fig. 6.1 Tanabe-Sugano diagram for high spin Fe " in either octahedral or tetrahedral coordination (Sherman, 985, with permission).

In order to use the Tanabe-Sugano diagram properly, the transition probabilities have to be taken into consideration. We have a ground state and we have many excited states, but not all transitions from ground to excited state and in the opposite direction are allowed. It is all a question of probability, while some have a high probability of occurrence, namely, allowed and intense transitions and some have a low probability, namely, forbidden and weak or very weak transitions. 

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