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A New Coordination Mode of the Photometric Reagent Glyoxalbis(2-hydroxyanil) (H2gbha): Bis-Bidentate Bridging by gbha2- in the Redox Series (μ-gbha)[Ru(acac)2]2n (n = -2, -1, 0, +1, +2), Including a Radical-Bridged Diruthenium(III) and a RuIII/RuIV Intermediate

S. Kar, B. Sarkar, S. Ghumaan, D. Roy, F. Urbanos, J. Fiedler, R. Sunoj, R. Jimenez-Aparicio, W. Kaim, and G. Lahiri. Inorganic Chemistry, 44 (24): 8715--8722 (2005)
DOI: 10.1021/ic050950r

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Sandeep Vidyapu University of Stuttgart

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2,2'-Dipyridylketone (dpk) as Ancillary Acceptor and Reporter Ligand in Complexes [(dpk)(Cl)Ru(m-tppz)Ru(Cl)(dpk)]n+ where tppz = 2,3,5,6-Tetrakis(2-pyridyl)pyrazineS. Ghumaan, B. Sarkar, N. Chanda, M. Sieger, J. Fiedler, W. Kaim, and G. Lahiri. Inorganic Chemistry, 45 (19): 7955--7961 (2006)Valence-state analysis through spectroelectrochemistry in a series of quinonoid-bridged diruthenium complexes [(acac)2Ru(m-L)Ru(acac)2]n (n = +2, +1, 0, -1, -2)S. Ghumaan, B. Sarkar, S. Maji, V. Puranik, J. Fiedler, F. Urbanos, R. Jimenez-Aparicio, W. Kaim, and G. Lahiri. Chemistry - A European Journal, 14 (34): 10816--10828 (2008)Isovalent and Mixed-Valent Diruthenium Complexes [(acac)2RuII(m-bpytz)RuII(acac)2] and [(acac)2RuII(m-bpytz)RuIII(acac)2](ClO4) (acac = Acetylacetonate and bpytz = 3,6-Bis(3,5-dimethylpyrazolyl)-1,2,4,5-tetrazine): Synthesis, Spectroelectrochemical, and EPR InvestigationS. Patra, B. Sarkar, S. Ghumaan, J. Fiedler, W. Kaim, and G. Lahiri. Inorganic Chemistry, 43 (19): 6108--6113 (2004)A New Coordination Mode of the Photometric Reagent Glyoxalbis(2-hydroxyanil) (H2gbha): Bis-Bidentate Bridging by gbha2- in the Redox Series (μ-gbha)[Ru(acac)2]2n (n = -2, -1, 0, +1, +2), Including a Radical-Bridged Diruthenium(III) and a RuIII/RuIV IntermediateS. Kar, B. Sarkar, S. Ghumaan, D. Roy, F. Urbanos, J. Fiedler, R. Sunoj, R. Jimenez-Aparicio, W. Kaim, and G. Lahiri. Inorganic Chemistry, 44 (24): 8715--8722 (2005)(μ-L)[RuII(acac)2]2n, n = 2+, +, 0, -, 2-, with L = 3,3',4,4'-tetraimino-3,3',4,4'-tetrahydrobiphenyl. EPR-supported assignment of NIR absorptions for the paramagnetic intermediatesS. Patra, B. Sarkar, S. Ghumaan, J. Fiedler, S. Zalis, W. Kaim, and G. Lahiri. Dalton Transactions, (2004)The triruthenium complex [(acac)2RuII3(L)] containing a conjugated diquinoxaline[2,3-f:2',3'-h]phenazine (L) bridge and acetylacetonate (acac) as ancillary ligands. Synthesis, spectroelectrochemical and EPR investigationS. Patra, B. Sarkar, S. Ghumaan, J. Fiedler, W. Kaim, and G. Lahiri. Dalton Transactions, (2004)Probing Mixed Valence in a New tppz-Bridged Diruthenium(III,II) Complex (μ-tppz)[Ru(bik)Cl]23+ (tppz = 2,3,5,6-Tetrakis(2-pyridyl)pyrazine, bik = 2,2'-Bis(1-methylimidazolyl)ketone): EPR Silence, Intervalence Absorption, and nCO Line BroadeningM. Koley, B. Sarkar, S. Ghumaan, E. Bulak, J. Fiedler, W. Kaim, and G. Lahiri. Inorganic Chemistry, 46 (9): 3736--3742 (2007)Ancillary ligand determination of the spin location in both oxidised and reduced forms of diruthenium complexes bridged by bis-bidentate 1,4-bis(2-phenolato)-1,4-diazabutadieneS. Kar, B. Sarkar, S. Ghumaan, M. Leboschka, J. Fiedler, W. Kaim, and G. Lahiri. Dalton Transactions, (2007)2,5-Dioxido-1,4-benzoquinonediimine (H2L2-), a hydrogen-bonding noninnocent bridging ligand related to aminated topaquinone: Different oxidation state distributions in complexes [(bpy)2Ru2(m-H2L)]n (n = 0 , +, 2+, 3+, 4+) and [(acac)2Ru2(m-H2L)]m (m = 2-, -, 0, +, 2+)S. Kar, B. Sarkar, S. Ghumaan, D. Janardanan, J. van Slageren, J. Fiedler, V. Puranik, R. Sunoj, W. Kaim, and G. Lahiri. Chemistry - A European Journal, 11 (17): 4901--4911 (2005)Tetrazine derived mononuclear RuII(acac)2(L) (1), [RuII(bpy)2(L)](ClO4)2 (2) and [RuII(bpy)(L)2](ClO4)2 (3) (L = 3-amino-6-(3,5-dimethylpyrazol-1-yl)-1,2,4,5-tetrazine, acac = acetylacetonate, bpy = 2,2'-bipyridine): Syntheses, structures, spectra and redox propertiesA. Nayak, S. Patra, B. Sarkar, S. Ghumaan, V. Puranik, W. Kaim, and G. Lahiri. Polyhedron, 24 (2): 333--342 (2005)