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
Artikel i vetenskaplig tidskrift, 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
Författare
Krister Larsson
Chalmers, Institutionen för material- och ytkemi, Oorganisk kemi
Lars Öhrström
Chalmers, Institutionen för material- och ytkemi, Oorganisk kemi
Inorganica Chimica Acta
Vol. 357 3 657-664
Ämneskategorier
Kemi
Organisk kemi
DOI
10.1016/j.ica.2003.07.001