Tanabe-Sugano diagrams via Java applets

A set of Tanabe-Sugano diagrams has been generated as SVG images as a way of being able to generate large printed versions.

A number of Java applets were developed to aid in spectral interpretation, they were originally compiled with the JDK vs 1.5 for Windows but unfortunately no longer work with recent versions of Browsers due to security restrictions etc. unless perhaps exceptions to the site were added to the Java control panel for each user.

The applets

the d² is for d2 (oct) and d8 (tet). d2 jar
the d³ is for d3 (oct) and d7 (tet). d3 jar
the d⁴ ls is for d4 low spin octahedral. d4 ls jar
the d⁵ ls is for d5 low spin octahedral. d5 ls jar
the d⁶ hs is for d6 high spin octahedral. d6 hs jar
the d⁶ ls is for d6 low spin octahedral. d6 ls jar
the d⁷ hs is for d7 high spin octahedral. d7 hs jar
the d⁸ is for d8 (oct) and d2 (tet). d8 jar

Both the spin-allowed and low-lying spin-forbidden transition energies are calculated and displayed.

More recently an alternative approach was to rewrite the code into JavaScript/HTML5. This enables the display of the TS diagrams on tablets, smartphones, etc. The conversions were done using swingjs code from Prof Bob Hanson and are in beta mode at present.

The JavaScript/HTML5 TS displays for d², d³, d⁷ and d⁸ are now available.

General Procedure

use the appropriate Tanabe-Sugano diagram to locate where the ratio of the second to first peak matches that found experimentally.
Tabulate the values of ν₁/B', ν₂/B', ν₃/B' from the Y-intercepts and Δ/B' from the X-intercept.

A spectroscopy exercise, based on the spectra of some simple Cr(III) complexes, has been developed that uses both JSpecView and Jmol (now merged as JSmol) and the TS d³ applet. This can be further developed for other Cr(III) examples where needed.

Otherwise, see the more general instructions for additional information.

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

Created Feb 1999. Links checked and/or last modified 2nd April 2019.
URL http://wwwchem.uwimona.edu.jm/courses/Tanabe-Sugano/TSapplets.html