Premium
Synthesis and Characterization of Cobalt Complexes of Heterocyclic Bidentate Ligands (N,X), X= S, Se
Author(s) -
Valenzuela E.,
SousaPedrares A.,
DuránCarril M. L.,
GarcíaVázquez J. A.,
Romero J.,
Sousa A.
Publication year - 2007
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.200700228
Subject(s) - chemistry , homoleptic , cobalt , denticity , crystallography , acetonitrile , molecule , ligand (biochemistry) , octahedron , monomer , metal , crystal structure , stereochemistry , inorganic chemistry , organic chemistry , biochemistry , receptor , polymer
The synthesis and structural characterization of a series of homoleptic cobalt complexes of general formula [Co(R‐pyX) 3 ] is reported, where X = S, Se; R = H, 3‐CF 3 and 5‐CF 3 . The compounds were synthesized by electrochemical oxidation of the metal in a cell containing an acetonitrile solution of the corresponding ligand. When 2,2′‐bipyridine (bipy) or 1,10‐phenanthroline (phen) were added to the electrolytic cell, mixed cobalt(II) compounds [Co(R‐pyX) 2 L] (L = bipy, phen) were also isolated. All of the complexes obtained have been characterized by microanalysis, vibrational and electronic spectroscopy, FAB mass spectrometry and, in the case of diamagnetic compounds that were sufficiently soluble, by 1 H and 13 C NMR spectroscopy. Crystals of [Co(3‐CF 3 ‐pyS) 3 ] and [Co(5‐CF 3 ‐pyS) 3 ] were obtained and studied by X‐ray diffraction. The crystal structures consist of monomeric molecules with the metal atom in an octahedral environment and the ligands in a meridional disposition.