Premium
On the existence and Autoreduction of Iron(III)‐hexacyanoferrate(III)
Author(s) -
De Wet J. F.,
Rolle R.
Publication year - 1965
Publication title -
zeitschrift für anorganische und allgemeine chemie
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.354
H-Index - 66
eISSN - 1521-3749
pISSN - 0044-2313
DOI - 10.1002/zaac.19653360114
Subject(s) - chemistry , valence (chemistry) , inorganic chemistry , oxidation state , ion , spectrophotometry , hydrolysis , molecule , nuclear chemistry , catalysis , organic chemistry , chromatography
A reinvestigation of the constitution of green and brown complex iron cyanides, often reputed to be Fe III Fe III (CN) 6 , has been undertaken. Infra‐red absorption spectrophotometry by means of which the valence state of iron in the [Fe(CN) 6 ] n− ‐ions may be identified, was used as main diagnostic tool. It was established that iron(III)‐hexacyanoferrate(III) had not hitherto been prepared in the pure state as the hexacyanoferrate ions in this compound are readily reduced, under the influence of the water present during precipitation, whereby CN‐ligands are oxidised and hydrolysed to CO 2 and NH 4 + . The reaction is furthermore maintained in dry samples by water molecules included in the lattice.