Reaction of [Ru VI(N)(sap)Cl] with excess NaN 3 affords a novel paramagnetic triazidoruthenium(iii) complex [Ru III(sap) (N 3) 3] 2-, which is isolated as a PPh 4 + salt (1). Reaction of 1 with Ni 2+ and Co 2+ ions produce two isostructural hexanuclear [Ru 4M 2] compounds, [Ru IV 4M II 2(μ 3-OMe) 2(μ-OMe) 2(μ-N) 2(μ-N 3) 2(μ-O phenoxy) 2(sap) 4 (MeOH) 4] (M = Ni 2 or Co 3). The molecular structures of 1-3 have been determined by X-ray crystallography. 1 is a mononuclear ruthenium(iii) compound where three azide ligands are bonded to ruthenium in a meridional fashion, while compounds 2 and 3 are isostructural hexanuclear compounds containing a defective face-sharing dicubane-like core with two missing vertexes. Variable-temperature dc magnetic susceptibility studies have been carried out for 2 and 3. These data indicate that there are four diamagnetic Ru(iv) ions in 2 and 3 and there is ferromagnetic interaction between the two Ni 2+ in 2 and Co 2+ in 3via the methoxy bridges.
Scopus Subject Areas
- Inorganic Chemistry