Voltammetric and Spectroscopic Study of Chromium(III)/Picolinate Complexes | Zendy

ParajónCosta Beatriz S. | Zendy; Wagner Claudia C. | Zendy; Baran Enrique J. | Zendy

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Voltammetric and Spectroscopic Study of Chromium(III)/Picolinate Complexes

Author(s) -

ParajónCosta Beatriz S.,

Wagner Claudia C.,

Baran Enrique J.

Publication year - 2003

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.200300050

Subject(s) - picolinic acid , cyclic voltammetry , chemistry , chromium , raman spectroscopy , electrochemistry , pyridine , valence (chemistry) , inorganic chemistry , infrared spectroscopy , medicinal chemistry , electrode , organic chemistry , physics , optics

The electrochemical properties and the stability of the Cr III complexes [Cr(pic) 3 ]·H 2 O and [Cr(pic) 2 (OH)] 2 ·5H 2 O (Hpic = pyridine‐2‐carboxylic acid = picolinic acid) were investigated in DMF solutions by cyclic voltammetry, and complemented by electronic spectroscopy. The electrochemical results indicate that both compounds undergo a one‐electron reversible reduction process. The mononuclear species has a more accessible reduction potential than the binuclear one. In this last case, the observed one‐electron process can be ascribed to a considerable stabilization of the mixed valence Cr III /Cr II species. Both complexes were also characterized by infrared and Raman spectroscopy.

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