Saccharose complexes of manganese in different oxidation states
The interaction between saccharose and manganese in different oxidation states was studied in alkaline media by polarographic, potentiometric, ESR spectroscopic and UV-Vis spectrophotometric methods. The results showed that stable manganese(II) and manganese(III) complexes and a complex of manganese...
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Published in | Inorganica Chimica Acta Vol. 123; no. 1; pp. 35 - 40 |
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Main Authors | , , , |
Format | Journal Article |
Language | English |
Published |
Lausanne
Elsevier B.V
1986
Elsevier Science |
Subjects | |
Online Access | Get full text |
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Summary: | The interaction between saccharose and manganese in different oxidation states was studied in alkaline media by polarographic, potentiometric, ESR spectroscopic and UV-Vis spectrophotometric methods. The results showed that stable manganese(II) and manganese(III) complexes and a complex of manganese(II,III) in a mixed oxidation state were formed with the composition [Mn
IIL(OH)
2], [Mn
2
IIIL
2(OH)
8]
2− and [Mn
IIMn
IIIL
2(OH)
6]
−, respectively. The manganese(II)-saccharose complex was shown to dimerize in alkaline media. The stability constants of the Mn(II,III) and Mn(III) complexes were determined. The oxidation of the manganese(II)-saccharose complex by a stoichiometric amount of K
3 [FeCN]
6 resulted in the formation of the manganese(III) and manganese(IV) complexes. However, oxidation by molecular oxygen only yielded the manganese(III) complex which reduced spontaneously in inert atmosphere to the mixed valence Mn(II,III) complex. The latter was able to be oxidized again by oxygen to the Mn(III) complex. This process proved to be reversible and could be repeated several times. |
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ISSN: | 0020-1693 1873-3255 |
DOI: | 10.1016/S0020-1693(00)81312-2 |