摘要:
The reactions of the dimers [Ru(eta-6-arene)Cl2]2 (arene = C6H6, 1,4-MeC6H4CHMe2, [2(2)](1,4)C16H16) with a range of aminopyridine ligands have been investigated. These ligands can potentially coordinate to a single metal centre in a monodentate fashion through either pyridyl or amino nitrogen atoms, can chelate a single metal centre, or can bridge across two metal ions. Spectroscopic data collected on 12 compounds is exclusively consistent with monodentate coordination via the pyridyl nitrogen atoms. This mode of coordination has been conclusively established by X-ray structure determinations of the compounds [Ru(eta-6-1,4-MeC6H4CHMe2)Cl2(NC5H4NH2)] and Ru(eta-6-C16H16) Cl2(NC5H4NH2)].