Dinuclear ruthenium(II) bipyridine complexes having non-symmetric α,α′-diimine based neutral bridging ligands.

Chakraborty, Soma; Munshi, Pradip; Lahiri, Goutam Kumar

doi:10.1016/s0277-5387(99)00003-0

Cited by 32 publications

(18 citation statements)

References 58 publications

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“…The bridging ligand bdptb was synthesized on the basis of the method for the 1,2,4-triazine ring preparation established by Case [24,25]. By the action of an ethanol solution of hydrazine, 2,2 0 -dicyano-4,4 0 -bipyridine was converted into bahmb (70% yield).…”

Section: Syntheses Resolving Of Enantiomers and Characterizationmentioning

confidence: 99%

Syntheses, characterization and DNA-binding study of chiral complexes ΔΔ- and ΛΛ-[Ru(bpy)2(bdptb)Ru(bpy)2]4+

Jiang

2004

Journal of Inorganic Biochemistry

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Section: Syntheses Resolving Of Enantiomers and Characterizationmentioning

confidence: 99%

Syntheses, characterization and DNA-binding study of chiral complexes ΔΔ- and ΛΛ-[Ru(bpy)2(bdptb)Ru(bpy)2]4+

Jiang

2004

Journal of Inorganic Biochemistry

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“…In acetonitrile solution the complex 1 exhibits one two-electron oxidation process near 1⋅5V vs SCE corresponding to the simultaneous oxidations of the two ruthenium(II) centres in 1 5 . The appearance of simultaneous oxidations of both the metal centres across the bridging unit (I) implies a situation of typical class I type dinuclear species where there is existence of no or very weak intermetallic coupling 2, 5 .…”

Section: Methodsmentioning

confidence: 99%

Bridging function mediated intermetallic coupling in diruthenium-bis(bipyridine) complexes

et al. 2002

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The interactions of potentially dinucleating bridging functionalities (I-VI) with the ruthenium-bis(bypyridine) precursor [Ru II (bpy) 2 (EtOH) 2 ] 2+ have been explored. The bridging functions I, II and VI directly result in the expected dinuclear complexes of the type [(bpy) 2 Ru II {L n }Ru II (bpy) 2 ] z+ (1, 2, 7 and 8) (n = 0, z = 4 and n =-2, z = 2). The bridging ligand III undergoes N-N or N-C bond cleavage reaction on coordination to the Ru II (bpy) 2 core which eventually yields a mononuclear complex of the type [(bpy) 2 Ru II (L)] + , 3, where L =-OC 6 H 3 (R)C(R′)=N-H. However, the electrogenerated mononuclear ruthenium(III) congener, 3 + in acetonitrile dimerises to [(bpy) 2 Ru III {-OC 6 H 3 (R)C(R′)=N-N=(R′)C(R)C 6 H 3 O-}Ru III (bpy) 2 ] 4+ (4). In the presence of a slight amount of water content in the acetonitrile solvent the dimeric species (4) reduces back to the starting ruthenium(II) monomer (3). The preformed bridging ligand IV undergoes multiple transformations on coordination to the Ru(bpy) 2 core, such as hydrolysis of the imine groups of IV followed by intermolecular head-to-tail oxidative coupling of the resultant amino phenol moieties, which in turn results in a new class of dimeric complex of the type [(bpy) 2 Ru II {-OC 6 H 4-N=C 6 H 3 (=NH)O-}Ru II (bpy) 2 ] 2+ (5). In 5, the bridging ligand comprises of two N,O chelating binding sites each formally in the semiquinone level and there is a p-benzoquinonediimine bridge between the metal centres. In complex 6, the preformed bridging ligand, 3,6-bis(3,5-dimethylpyrazol-1-yl)-1,2-dihydro-1,2,4,5tetrazine, H 2 L (V) undergoes oxidative dehydrogenation to aromatic tetrazine based bridging unit, 3,6-bis(3,5-dimethylpyrazol-1-yl)-1,2,4,5-tetrazine, L. The detailed spectroelectrochemical aspects of the complexes have been studied in order to understand the role of the bridging units towards the intermetallic electronic coupling in the dinuclear complexes.

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“…For related literature on bidendate Schiff base ligands, see: Chakraborty et al (1999); Haga & Koizumi (1985).…”

Section: Related Literaturementioning

confidence: 99%

2-(Thiophen-2-yl)-N-(4-{(E)-[2-(thiophen-2-yl)ethyl]iminomethyl}benzylidene)ethanamine

2011

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Dinuclear ruthenium(II) bipyridine complexes having non-symmetric α,α′-diimine based neutral bridging ligands.

Cited by 32 publications

References 58 publications

Syntheses, characterization and DNA-binding study of chiral complexes ΔΔ- and ΛΛ-[Ru(bpy)2(bdptb)Ru(bpy)2]4+

Syntheses, characterization and DNA-binding study of chiral complexes ΔΔ- and ΛΛ-[Ru(bpy)2(bdptb)Ru(bpy)2]4+

Bridging function mediated intermetallic coupling in diruthenium-bis(bipyridine) complexes

2-(Thiophen-2-yl)-N-(4-{(E)-[2-(thiophen-2-yl)ethyl]iminomethyl}benzylidene)ethanamine

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