X-ray and NMR study of the fate of the Co(1, 10-phenanthroline-5,6-diketone)3 (3+) ion in aqueous solution: supramolecular motifs in the packing of 1,10-phenanthroline-5,6-diketone and 1,10-phenanthroline-5,6-diol complexes
Journal article, 2004
X-ray structures are presented of three new cobalt complexes prepared from Co(III) and N,N'-1,10-phenanthroline-5,6-dione. The cis-aqua-chloro-bis(N,N'-1,10-phenanthroline-5,6-dione)cobalt(II) nitrate trihydrate (3) and the cis-aqua-bromobis(N,N'-1,10-phenanthroline-5,6-dione)cobalt(II) trifluoro-methanesulfonate tetrahydrate (4), crystalize in the same space group with a similar arrangement of the complex ions. However, on the molecular scale there are important differences. The cobalt complex in 3 has a typical high-spin geometry whereas in 4 the cobalt complex displays a Jahn-Teller distortion characteristic for low-spin compounds. The third structure is di(N,N'-1,10-phenanthroline-5,6-diol)(N,N'-1,10-phenanthroline-5,6-dione )cobalt(III) bromide hexahydrate (5). NMR studies of the hydration of the Co(III)(1,10-phenanthroline-5,6-dione)(3)(3+) ion in water and DMSO are also presented. The various possible transformations of the N,N'-1,10-phenanthroline-5,6-dione ligand are discussed. (C) 2003 Elsevier B.V. All rights reserved.
6-dione
derivatives
ruthenium
ligands
oxidation
N
X-ray diffraction
states
10-phenanthroline-5
NMR
cobalt(ii)
N
transition-metal complexes
coordination-compounds
'
coordination compounds
hydrogen bond
chemistry
Co
hydration
1
Author
Krister Larsson
Chalmers, Department of Materials and Surface Chemistry, Inorganic Chemistry
Lars Öhrström
Chalmers, Department of Materials and Surface Chemistry, Inorganic Chemistry
Published in
Inorganica Chimica Acta
Vol. 357 Issue 3 p. 657-664
Categorizing
Subject Categories (SSIF 2011)
Chemical Sciences
Organic Chemistry
Identifiers
DOI
10.1016/j.ica.2003.07.001