Mixed-valence ruthenium dimers. Molecular and electronic structure of the p-benzoquinone diimine bridged ion [(NH3)5Ru(bqd)Ru(NH3)5]5+ (bqd = p-benzoquinone diimine) and its relationship to the Creutz-Taube ion

Joss, S.; Buergi, H. B.; Lüdi, A.

doi:10.1021/ic00200a029

Cited by 29 publications

(9 citation statements)

References 3 publications

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“…In [(NH 3 ) 5 Ru(μ-bqd)Ru(NH 3 ) 5 ] 5+ (bqd is p -benzoquinone diimine), the two metal centers are structurally equivalent in the p -benzene-disulfonate and m -nitrobenzenesulfonate salts. Narrow, solvent-independent bands appear at 10 600, 7740, and 7590 cm -1 …”

Section: Classificationmentioning

confidence: 99%

The Localized-to-Delocalized Transition in Mixed-Valence Chemistry

2001

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Section: Classificationmentioning

confidence: 99%

The Localized-to-Delocalized Transition in Mixed-Valence Chemistry

2001

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“…We anticipated that if a quinonoid ligand were used to bridge two ruthenium centers, a pronounced delocalization over the bridge and the two metal centers would result. Such a delocalization apparently occurs in the p -benzoquinonediimine-bridged complex [(NH 3 ) 5 Ru- p -BQDI-Ru(NH 3 ) 5 ] − and in other bridged systems such as the 3,6-bis(2-pyridyl)-1,2,4,5-tetrazine (bptz) species and various terpyridine systems and is, of course, well-known in the Creutz−Taube ion and related species. , Recently some bridged tetraoxobenzene and -naphthalene analogues of the molecule under study here have also appeared. − Coupling through a p -quinone-bridged diruthenium and diosmium species is also relevant …”

Section: A Introductionmentioning

confidence: 99%

Binuclear 1,2,4,5-Tetraimino-3,6-diketocyclohexane Bis[bis(Bipyridine)ruthenium(II)] Redox Series

et al. 1999

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The reaction of the [Ru(bpy)2(MeOH)2]2+ cation (bpy = 2,2'-bipyridine) with 1,2,4,5-tetraaminobenzene in the presence of trace water and oxygen yields the cation [(bpy)2Ru(1,2,4,5-tetraimino-3,5-diketocyclohexane)Ru(bpy)2]4+. This binuclear species undergoes ligand-based reductions, giving the 3+ and 2+ charged species. The X-ray structure, electrochemistry, ZINDO calculations, and NMR, ESR, UV/vis, and IR spectra were analyzed where possible, giving an electronic model of the binuclear species and some of its redox products. The X-ray structure reveals the [(bpy)2Ru] fragments symmetrically disposed across the 1,2,4,5-tetraimino-3,5-diketocyclohexane bridge in a molecule with Cs symmetry.

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“…In 1981, Ludi et al managed to prepare a dinuclear ruthenium complex incorporating a p-BQDI bridge (4, Figure 1) by mixing p-PDA in an aqueous solution of [(NH3)5Ru(H2O)] 2+ [28]. Interestingly, the absorption spectrum of 4 exhibits three intense low energy bands in the red and near-infrared (NIR) ranges which were attributed to intervalence charge transfer (IVCT) transitions [29]. Cyclic voltammetry of 4 in acetonitrile/water reveals oxidation and reduction at 0.82 and 0.21 V vs. NHE, respectively, while the reduction of the p-BQDI ligand to p-PDA presumably occurs ca.…”

Section: P-benzoquinonediimine Ligandsmentioning

confidence: 99%

Benzoquinonediimine ligands: Synthesis, coordination chemistry and properties

Pascal

Siri

2017

Coordination Chemistry Reviews

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This review covers the synthesis and properties of 2,5-diamino-1,4-benzoquinonediimines (DABQDI), and their use as ligand in coordination chemistry. Although reported more than a century ago, these molecules emerged as highly versatile ligands only from 1998, and are so far used for the synthesis of numerous complexes with remarkable properties. This exceptional versatility results from the possible tuning of the N-substituents and the observation of an isomerization process upon coordination depending on the metal center. As such, these DABQDI can be also considered as ligands that combine the structural elements of ortho-and para-benzoquinonediimines (o-BQDI and p-BQDI) which are bidentate monotopic and monodentate ditopic ligands, respectively. These two classes of BQDI ligands are also reviewed in order to parallel their properties to those of the complexes based on DABQDI.

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Mixed-valence ruthenium dimers. Molecular and electronic structure of the p-benzoquinone diimine bridged ion [(NH3)5Ru(bqd)Ru(NH3)5]5+ (bqd = p-benzoquinone diimine) and its relationship to the Creutz-Taube ion

Cited by 29 publications

References 3 publications

The Localized-to-Delocalized Transition in Mixed-Valence Chemistry

The Localized-to-Delocalized Transition in Mixed-Valence Chemistry

Binuclear 1,2,4,5-Tetraimino-3,6-diketocyclohexane Bis[bis(Bipyridine)ruthenium(II)] Redox Series

Benzoquinonediimine ligands: Synthesis, coordination chemistry and properties

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