Choose a Chromium complex.
In the visible spectrum displayed, select the lowest energy peak then the higher energy peak and the ratio will be calculated automatically for you.
peak 1 cm-1 peak 2 cm-1. The ratio of the energies is

Now find where this ratio falls on the Tanabe-Sugano diagram and to get the predicted value of B' and the energies of the transitions.

B', v1, v2, v3, f1, f2, f3, f4, f5, f6, f7, f8 in cm-1
Thanks to C. Muir and D-A.P. Facey for help with the Applet and L. Muir-Green for preparing some of the Cr(III) complexes. 		spin-allowed transitions
4T1g(P) <- 4A2g Green (v3)
4T1g(F) <- 4A2g Blue (v2)
4T2g(F) <- 4A2g Red (v1)
spin-forbidden transitions
2T2g(D) <- 4A2g Purple (f8)
2T1g(H) <- 4A2g Dk green (f7)
2Eg(H) <- 4A2g Copper (f6)
2T2g(H) <- 4A2g Lt green (f5)
2A1g(G) <- 4A2g Grey (f4)
2T2g(G) <- 4A2g Brown (f3)
2T1g(G) <- 4A2g Orange (f2)
2E g(G) <- 4A2g Teal (f1)

Copyright © 2002-2011 by Robert John Lancashire, all rights reserved.

Created and maintained by Prof. Robert J. Lancashire,
The Department of Chemistry, University of the West Indies,
Mona Campus, Kingston 7, Jamaica.