Experiment 1 - Preparation and properties of some Cr(III) complexes
Preparation of some chromium(III) complexes, either:
- [Cr(en)3]Cl3 and
K[CrEDTA(H2O)]
- [Cr(urea)6]Cl3 and
K3[Cr(NCS)6] or
- cis-[Cr(en)2Cl2]Cl.1.5 H2O
and
cis-K[Cr(ox)2(H2O)2].2H2O
The on-line display shows the use of
the JavaScript/HTML5 versions of JSpecView and JSmol.
The JavaScript/HTML5 version of the
d3-Tanabe-Sugano diagram is on a separate page.
The next page will display several regions:
- The top section has a menu of about 10 complexes to select from.
- On the left is the visible spectrum
- On the right is the display of the 3D molecular graphics.
- The variables can be passed to the Tanabe-Sugano diagram for a d3 complex
- The bottom secion gives the results of calculations of the
Racah parameter B' and the estimated energies of the electronic transitions.
The complexes displayed above are:
- K3[Cr(ox)3].3H2O
- [Cr(urea)6]Cl3
- [Cr(en)3]Cl3
- [Cr(oxine)3
- Chromium glycinate
- cis-[CrCl2(en)2]Cl.1.5
H2O
- Cr(acac)3
- K[Cr(EDTA)(H2O)]
- K3[Cr(NCS)6]
- trans-K[Cr(ox)2(H2O)2].2H2O
- cis-K[Cr(ox)2(H2O)2].2H2O
A display with all spectra superimposed is available.
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CHEM2111 Laboratory Manual pages.
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Created and maintained by Prof. Robert J.
Lancashire,
The Department of Chemistry, University of the West Indies,
Mona Campus, Kingston 7, Jamaica.
Created October 2002. Links checked and/or last
modified 13th March 2019.
URL
http://wwwchem.uwimona.edu.jm/lab_manuals/CrTSexptnu/Crspectra.html