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Low Valence States of Metal Chelates. V. Tris(1,10‐phenanthroline)cobalt(II) and bis(2,9‐dimethyl‐1,10‐phenanthroline)cobalt(II) perchlorates
Author(s) -
Arena G.,
Bonomo R. P.,
Musumeci S.,
Rizzarelli E.
Publication year - 1975
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.19754120209
Subject(s) - cobalt , phenanthroline , chemistry , perchlorate , acetonitrile , polarography , tetraethylammonium , cyclic voltammetry , metal , inorganic chemistry , chelation , valence (chemistry) , medicinal chemistry , electrochemistry , ion , electrode , organic chemistry , potassium
D. C. polarography and cyclic voltammetry were used for investigating the reduction processes of the tris(1,10‐phenanthroline)cobalt(II) and bis(2,9‐dimethyl‐1, 10‐phenanthroline)‐cobalt(II) perchlorates in 0.1 M solutions of tetraethylammonium perchlorate in acetonitrile. The first complex gave a four‐step reduction wave; the first two steps were found to be diffusion controlled and reversible reductions from Co(phen) 3 ++ to Co(phen) 3 + to Co(phen) 3 +to Co(phen;) 3 −occured. The second complex gave a six‐step reduction wave; the first three steps were found to be diffusion controlled and were to be considered as successive reversible reductions from Co(2, 9dm‐phen) 2 ++ to Co(2, 9dmphen) 2 + , from Co(2, 9dmphen) 2 +to Co(2, 9dmphen) 2 and from Co(2, 9dmphen) 2 to Co(2, 9dmphen) 2 − .