Chromium(III) complexes of naturally occurring amino acids |
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Authors: | Mohamed S. El-Shahawi |
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Affiliation: | (1) Chemistry Department, Faculty of Science, UAE University, PO Box 17551, Al-Ain, United Arab Emirates |
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Abstract: | Summary Amino acid complexes of CrCl3Py3 have been prepared and studied by elemental analysis, magnetic susceptibility, vibrational (i.r.), electronic and circular dichroism spectroscopy. Two peaks in the visible spectra are assigned to a d-d transition in pseudo octahedral symmetry. The spectrochemical parameters (Dq, B and 35) for the complexes were calculated which confirm that pyridine nitrogen and/or chlorine are not removed. Prolonged heating or bubbling of air through the solution of CrCl3-Py3 containing l-(-)-histidine or l-(-)-threonine for several hours enhanced formation of chromium (VI). |
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