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Oxydoreduction and Complex Formation Between Fe 3+ Ions and Acetylacetonedioxime
Author(s) -
Adato I.,
BenBassat A. H. I.,
Sarel S.
Publication year - 1970
Publication title -
israel journal of chemistry
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.908
H-Index - 54
eISSN - 1869-5868
pISSN - 0021-2148
DOI - 10.1002/ijch.197000114
Subject(s) - chemistry , complex ions , aqueous solution , ion , electron paramagnetic resonance , potentiometric titration , polarography , oxime , inorganic chemistry , molecule , medicinal chemistry , organic chemistry , nuclear magnetic resonance , physics
The reactions between Fe 3+ ions and acetylacetonedioxime (AADO) have been studied by potentiometric, polarographic and spectrophotometric methods. Two Fe 3+ ions are reduced in aqueous solution by one AADO molecule to give Fe 2+ ions and the oxidized form of AADO (NPO = AADO‐2e = 2‐nitrosopent‐2‐en‐4‐one oxime). NPO forms a water soluble, red coloured complex with Fe (III). The synthesis of bis (2‐nitrosopent‐2‐en‐4‐one oximato) Fe (III) complex is described. The elemental analysis of the solid complex is consistent with the composition FeO (NPO) 2 (OH). The IR, EPR and Mössbauer spectra of the complex are presented and the bonding properties of the coordination environment of Fe (III) is discussed. A mechanism for the oxydoreduction and complexation reactions for the Fe 3+ ‐AADO system is proposed and its kinetic parameters are: k ox.red. = 1.72 × 10 −1 min −1 , k compl. = 5.13 l0 −2 min −1 .