ISSN:
0018-019X
Schlagwort(e):
Chemistry
;
Organic Chemistry
Quelle:
Wiley InterScience Backfile Collection 1832-2000
Thema:
Chemie und Pharmazie
Notizen:
The Cu2+-catalyzed oxidation of o-phenylenediaminc (H2B) by O2 is strongly influenced by different organic and inorgarnic ligands. While chelating agents, e. g. ethylenediamine and ethylenediamine tetraacetic acid, inhibit the catalysis by Cu2+, the reaction is accelerated under the influence of some monodentate ligands, e.g. C1-, Br-, NH3, pyridine and imidazolc (PYR). We have found that these latter ligands enable the cupric ion to react directly with H2B (I). The cuprous complex formed in equilibrium is then reoxidized by O2 (II). The rate determining oxidation step (I) is much faster than any direct reaction between o-phenylenediamine and O2 catalyzed by cupric ion.
Zusätzliches Material:
6 Ill.
Materialart:
Digitale Medien
URL:
http://dx.doi.org/10.1002/hlca.19640470624
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