Question

How many UV-vis absorption peaks are predicted for K2[CuCl4]? Explain your answer and draw an Orgel type diagram assigning all the predicted electronic transitions.

Answer 1

Here , the central atom is in a d^{​​​​​​9} configuration. And we know that the structure of [CuCl_​​​4 ]^2- is tetrahedral. The ground state term of d^{​​​​​​9} configuration is ²D. Hence the Orgel diagram is given below -