Crystal structure and magnetic study of the complex salt [RuCp(PTA)₂–μ-CN-1κC:2κN–RuCp(PTA)₂][Re(NO)Br₄(EtOH)_0.5(MeOH)_0.5]

Abstract

A new RuII–ReII complex salt, μ-cyanido-κ2 C:N-bis[(η5-cyclopentadienyl)bis(3,5,7-triazaphosphaadamantane-κP)ruthenium(II)] tetrabromido(ethanol/methanol-κO)nitrosylrhenate(II), [Ru(CN)(C5H5)2(C6H12N3P)4][ReBr4(NO)(CH4O)0.5(C2H6O)0.5] or [RuCp(PTA)2–μ-CN–1κC:2κ2 N-RuCp(PTA)2][Re(NO)Br4(EtOH)0.5(MeOH)0.5] (PTA = 3,5,7-triazaphosphaadamantane) was obtained and characterized by single-crystal X-ray diffraction, elemental analysis and infrared spectroscopy. The title salt was obtained by liquid–liquid diffusion of methanol/DMSO solutions of (NBu4)[Re(NO)Br4(EtOH)] and [(PTA)2CpRu–μ-CN–1κC:2κ2 N-RuCp(PTA)2](CF3SO3). The RuII and ReII independent moieties correspond to a binuclear and mononuclear complex ion, respectively. A deep geometrical parameter analysis was performed, and no significant differences were found with earlier reports containing similar molecules. The magnetic properties were investigated in the temperature range 2.0–300 K, and the complex behaves as a quasi-magnetically isolated spin doublet with weak antiferromagnetic interactions.

Heterobimetallic cyanide-bridged FeIII(μ-CN)MIIcomplexes (M = Mn and Cu): synthesis, structure and magnetism

“…The TIP values in cm 3 mol À1 for 1-4 are 490, 516, 470 and 769, respectively. 15 In this approach, the large value of y must be attributed to the presence of the spin-orbit coupling. So, these y values represent the maximum limits for these parameters.…”