A mixed-valence diruthenium complex, triply bridged by mixed-moieties of chloro and methoxo ligands

Abstract

A mixed-valence diruthenium complex, whose metal centres were triply bridged by one chloro and two methoxo ligands, was synthesized and characterized by X-ray structural analysis, electrochemistry and spectroscopy, and its mixed-valence state was classified into Class III.

Crystal structure ofcis,fac-{N,N-bis[(pyridin-2-yl)methyl]methylamine-κ3N,N′,N′′}dichlorido(dimethyl sulfoxide-κS)ruthenium(II)

“…The complex can be represented as the cis,fac-isomer to indicate the cis-geometry of the dmso ligand to the aliphatic N atom and the facial coordination mode of bpma. A literature survey of Ru II complexes of bpma and those of closely related bis(pyridin-2-ylmethyl)alkylamine ligands reveals that an overwhelming majority of the complexes contain facially coordinated tridentate ligands (Dakkach et al, 2013;Fischer et al, 2009;Mishra et al, 2009;Matsuya et al, 2009;Mola et al, 2006Mola et al, , 2007Mola et al, , 2009Rodriguez et al, 2001;Sala et al, 2008;Serrano et al, 2006;Shimizu et al, 2008;Suzuki et al, 2014). cis,fac-isomer is the thermodynamically favored (Mola et al, 2007), and therefore the more frequent occurrence of this isomer is unsurprising.…”

“…For the synthesis and structures of such complexes, see : Fischer et al (2009); Mola et al (2007). For complexes containing facially coordinated tridentate ligands, see: Dakkach et al (2013); Fischer et al (2009); Mishra et al (2009); Matsuya et al (2009); Mola et al (2006Mola et al ( , 2007Mola et al ( , 2009; Rodriguez et al (2001); Sala et al (2008); Serrano et al (2006); Shimizu et al (2008); Suzuki et al (2014)…”

Dinuclear Ruthenium(III)–Ruthenium(IV) Complexes, Having a Doubly Oxido-Bridged and Acetato- or Nitrato-Capped Framework

“…Several dinuclear complexes having a doubly oxido-bridged core, M 2 (μ-O) 2 , e.g., Mn–Mn, Fe–Mn, Fe–Fe, and Co–Co, have been synthesized and characterized in relation to oxidation reactions catalyzed by metal complexes. Diruthenium complexes having a doubly oxido- or hydroxido-bridged core, Ru 2 (μ-O) 2 or Ru 2 (μ-OH) 2 , , and triply bridged diruthenium complexes, in which a bidentate ligand is capped between metal centers with the doubly oxido- or hydroxido-bridged core, have been reported. , In our previous work on dinuclear frameworks using a tridentate ancillary ligand, ethylbis­(2-pyridylmethyl)­amine (ebpma), triply chlorido- and/or methoxido-bridged diruthenium complexes of Ru II –Ru III , [{Ru­(ebpma)} 2 (μ-Cl) n (μ-OMe) 3– n ] 2+ ( n = 1, 3), , and singly oxido-bridged complexes of Ru III –Ru IV , [{RuX 2 (ebpma)} 2 (μ-O)] + (X = Cl, Br), have been synthesized. Their structures and reactivities, as well as their competency for functioning as molecular conversion reaction sites, have been of interest.…”