FIRST STRUCTURAL CHARACTERIZATION OF AN 8-COORDINATE COBALT(II) COMPLEX CONTAINING 5-MEMBERED CHELATE RINGS - EVIDENCE FOR D-ORBITAL SIGMA-STABILIZATION ENERGY FAVORING 8-COORDINATION OVER 6-COORDINATION AT COBALT(II) IONS

Citation
Wo. Koch et al., FIRST STRUCTURAL CHARACTERIZATION OF AN 8-COORDINATE COBALT(II) COMPLEX CONTAINING 5-MEMBERED CHELATE RINGS - EVIDENCE FOR D-ORBITAL SIGMA-STABILIZATION ENERGY FAVORING 8-COORDINATION OVER 6-COORDINATION AT COBALT(II) IONS, Chemical communications, (22), 1997, pp. 2237-2238
Citations number
6
Categorie Soggetti
Chemistry
Journal title
ISSN journal
13597345
Issue
22
Year of publication
1997
Pages
2237 - 2238
Database
ISI
SICI code
1359-7345(1997):22<2237:FSCOA8>2.0.ZU;2-6
Abstract
For the first time, an eight-coordinate cobalt(II) complex is presente d where only five-membered chelate rings are formed with the coordinat ed ligand; evidence is put forward that in addition to reasons of the tetraazamacrocyclic nature of the ligand 2,11-diaza-[3.3](2,6)pyridino phane (L), eight-coordination at cobalt(II) ions is, to some extent, f avored with respect to six-coordination by the presence of d-orbital s igma-stabilization energy as calculated by angular:overlap methods.