Items where Author is "Fiedler, Jan"

Article

Das, Dipanwita ; Sarkar, Biprajit ; Kumbhakar, Doyel ; Mondal, Tapan Kumar ; Mobin, Shaikh M. ; Fiedler, Jan ; Urbanos, Francisco A. ; Jimenez-Aparicio, Reyes ; Kaim, Wolfgang ; Lahiri, Goutam Kumar (2011) Bis(acetylacetonato)ruthenium complexes of noninnocent 1,2-dioxolene ligands: qualitatively different bonding in relation to monoimino and diimino analogues Chemistry - A European Journal, 17 (39). pp. 11030-11040. ISSN 0947-6539

Das, Dipanwita ; Sarkar, Biprajit ; Mondal, Tapan Kumar ; Mobin, Shaikh M. ; Fiedler, Jan ; Kaim, Wolfgang ; Lahiri, Goutam Kumar (2011) Oxidation state analysis of a four-component redox series [Os(pap)₂(Q)]ⁿ involving two different non-innocent ligands on a redox-active transition metal Inorganic Chemistry, 50 (15). pp. 7090-7098. ISSN 0020-1669

Kundu, Tanaya ; Sarkar, Biprajit ; Mondal, Tapan Kumar ; Mobin, Shaikh M. ; Urbanos, Francisco A. ; Fiedler, Jan ; Jimenez-Aparicio, Reyes ; Kaim, Wolfgang ; Lahiri, Goutam Kumar (2011) Redox-rich spin-spin-coupled semiquinoneruthenium dimers with intense near-IR absorption Inorganic Chemistry, 50 (11). pp. 4753-4763. ISSN 0020-1669

Kundu, Tanaya ; Sarkar, Biprajit ; Mondal, Tapan Kumar ; Fiedler, Jan ; Mobin, Shaikh M. ; Kaim, Wolfgang ; Lahiri, Goutam Kumar (2010) Carboxylate tolerance of the redox-active platform [Ru(μ-tppz)Ru]ⁿ, where tppz = 2,3,5,6-Tetrakis(2-pyridyl)pyrazine, in the electron-transfer series [(L)ClRu(μ-tppz)RuCl(L)]ⁿ, n = 2+, +, 0, -, 2-, with 2-picolinato, quinaldato, and 8-quinolinecarboxylato ligands (L^-) Inorganic Chemistry, 49 (14). pp. 6565-6574. ISSN 0020-1669

Das, Dipanwita ; Das, Atanu Kumar ; Sarkar, Biprajit ; Mondal, Tapan Kumar ; Mobin, Shaikh M. ; Fiedler, Jan ; Zalis, Stanislav ; Urbanos, Francisco A. ; Jimenez-Aparicio, Reyes ; Kaim, Wolfgang ; Lahiri, Goutam Kumar (2009) The semiquinone-ruthenium combination as a remarkably invariant feature in the redox and substitution series [Ru(Q)_n(acac)_3-n]^m, n = 1-3; m = (-2), -1, 0, +1, (+2); Q = 4,6-di-tert-butyl-n-phenyl-o-iminobenzoquinone Inorganic Chemistry, 48 (24). pp. 11853-11864. ISSN 0020-1669

Kumbhakar, Doyel ; Sarkar, Biprajit ; Das, Amit ; Das, Atanu Kumar ; Mobin, Shaikh M. ; Fiedler, Jan ; Kaim, Wolfgang ; Lahiri, Goutam Kumar (2009) Valence structures of the diastereomeric complexes meso- and rac-[Ru₂(acac)₄(μ-Q)]ⁿ (n = 2-, 1-, 0, 1+, 2+) with the multiple quinonoid bridging ligand Q = 1,2,4,5-tetraimino-3,6-diketocyclohexane Dalton Transactions (43). pp. 9645-9652. ISSN 0300-9246

Roy, Sayak ; Sarkar, Biprajit ; Duboc, Carole ; Fiedler, Jan ; Sarper, Orkan ; Lissner, Falk ; Mobin, Shaikh M. ; Lahiri, Goutam Kumar ; Kaim, Wolfgang (2009) Heterohexanuclear (Cu₃Fe₃) complexes of substituted hexaazatrinaphthylene (HATN) ligands: twofold BF₄- association in the solid and stepwise oxidation (3e) or reduction (2e) to spectroelectrochemically characterized Species Chemistry: A European Journal, 15 (28). pp. 6932-6939. ISSN 0947-6539

Das, Atanu Kumar ; Sarkar, Biprajit ; Duboc, Carole ; Strobel, Sabine ; Fiedler, Jan ; Zalis, Stanislav ; Lahiri, Goutam Kumar ; Kaim, Wolfgang (2009) An odd-electron complex [Ru^k(NO^m)(Qⁿ)(terpy)]²⁺ with two prototypical non-innocent ligands Angewandte Chemie International Edition, 48 (23). pp. 4242-4245. ISSN 1433-7851

Das, Atanu Kumar ; Sarkar, Biprajit ; Fiedler, Jan ; Zalis, Stanislav ; Hartenbach, Ingo ; Strobel, Sabine ; Lahiri, Goutam Kumar ; Kaim, Wolfgang (2009) A five-center redox system: molecular coupling of two noninnocent imino-o-benzoquinonato-ruthenium functions through a π acceptor bridge Journal of the American Chemical Society, 131 (25). pp. 8895-8902. ISSN 0002-7863

Ghumaan, Sandeep ; Sarkar, Biprajit ; Maji, Somnath ; Puranik, Vedavati G. ; Fiedler, Jan ; Urbanos, Francisco A. ; Jimenez-Aparicio, Reyes ; Kaim, Wolfgang ; Lahiri, Goutam Kumar (2008) Valence-state analysis through spectroelectrochemistry in a series of quinonoid-bridged diruthenium complexes [(acac)₂Ru(μ-L)Ru(acac)₂]ⁿ (n=+2, +1, 0, -1, -2) Chemistry - A European Journal, 14 (34). pp. 10816-10828. ISSN 0947-6539

Kumbhakar, Doyel ; Sarkar, Biprajit ; Maji, Somnath ; Mobin, Shaikh M. ; Fiedler, Jan ; Urbanos, Francisco A. ; Jimenez-Aparicio, Reyes ; Kaim, Wolfgang ; Lahiri, Goutam Kumar (2008) Intramolecular valence and spin interaction in meso and rac diastereomers of a p-quinonoid-bridged diruthenium complex Journal of the American Chemical Society, 130 (51). pp. 17575-17583. ISSN 0002-7863

Maji, Somnath ; Sarkar, Biprajit ; Mobin, Shaikh M. ; Fiedler, Jan ; Urbanos, Francisco A. ; Jimenez-Aparicio, Reyes ; Kaim, Wolfgang ; Lahiri, Goutam Kumar (2008) Valence-state alternatives in diastereoisomeric complexes [(acac)₂Ru(μ-QL)Ru(acac)₂]ⁿ (QL^2- = 1,4-Dioxido-9,10-anthraquinone,n = +2, +1, 0, -1, -2) Inorganic Chemistry, 47 (12). pp. 5204-5211. ISSN 0020-1669

Sarkar, Biprajit ; Patra, Srikanta ; Fiedler, Jan ; Sunoj, Raghavan B. ; Janardanan, Deepa ; Lahiri, Goutam Kumar ; Kaim, Wolfgang (2008) Mixed-valent metals bridged by a radical ligand: fact or fiction based on structure-oxidation state correlations Journal of The American Chemical Society, 130 (11). pp. 3532-3542. ISSN 0002-7863

Samanta, Subhas ; Singh, Priti ; Fiedler, Jan ; Zalis, Stanislav ; Kaim, Wolfgang ; Goswami, Sreebrata (2008) Singlet diradical complexes of ruthenium and osmium: geometrical and electronic structures and their unexpected changes on oxidation Inorganic Chemistry, 47 (5). pp. 1625-1633. ISSN 0020-1669

Maity, Amarendra N. ; Schwederski, Brigitte ; Sarkar, Biprajit ; Zalis, Stanislav ; Fiedler, Jan ; Kar, Sanjib ; Lahiri, Goutam K. ; Duboc, Carole ; Grunert, Matthias ; Gutlich, Philipp ; Kaim, Wolfgang (2007) Tetranuclear complexes of [Fe(CO)₂(C₅H₅)]+ with TCNX ligands (TCNX = TCNE, TCNQ, TCNB): intramolecular electron transfer alternatives in compounds (μ₄-TCNX)[ML_n]₄ Inorganic Chemistry, 46 (18). pp. 7312-7320. ISSN 0020-1669

Ghumaan, Sandeep ; Sarkar, Biprajit ; Patil, Mahendra P. ; Fiedler, Jan ; Sunoj, Raghavan B. ; Kaim, Wolfgang ; Lahiri, Goutam Kumar (2007) Multiple one-electron oxidation and reduction of trinuclear bis(2,4-pentanedionato)ruthenium complexes with substituted diquinoxalino[2,3-a:2',3'-c]phenazine ligands Polyhedron, 26 (13). pp. 3409-3418. ISSN 0277-5387

Koley, Moumita ; Sarkar, Biprajit ; Ghumaan, Sandeep ; Bulak, Ece ; Fiedler, Jan ; Kaim, Wolfgang ; Lahiri, Goutam Kumar (2007) Probing mixed valence in a new tppz-bridged diruthenium(III,II) Complex {(μ -tppz)[Ru(bik)Cl]₂}³⁺ (tppz = 2,3,5,6-tetrakis(2-pyridyl)pyrazine, bik = 2,2'-bis(1-methylimidazolyl)ketone): EPR silence, intervalence absorption, and ν_CO line broadening Inorganic Chemistry, 46 (9). pp. 3736-3742. ISSN 0020-1669

Kar, Sanjib ; Sarkar, Biprajit ; Ghumaan, Sandeep ; Leboschka, Markus ; Fiedler, Jan ; Kaim, Wolfgang ; Lahiri, Goutam Kumar (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-diazabutadiene Dalton Transactions (19). pp. 1934-1938. ISSN 0300-9246

Maji, Somnath ; Sarkar, Biprajit ; Mobin, Shaikh M. ; Fiedler, Jan ; Kaim, Wolfgang ; Lahiri, Goutam Kumar (2007) Non-innocent behaviour of ancillary and bridging ligands in homovalent and mixed-valent ruthenium complexes [A₂Ru(μ -L)RuA₂]ⁿ, A = 2,4-pentanedionato or 2-phenylazopyridine, L^2- = 2,5-bis(2-oxidophenyl)pyrazine Dalton Transactions (23). pp. 2411-2418. ISSN 0300-9246

Sanyal, Anasuya ; Chatterjee, Sudipta ; Castineiras, Alfonso ; Sarkar, Biprajit ; Singh, Priti ; Fiedler, Jan ; Zalis, Stanislav ; Kaim, Wolfgang ; Goswami, Sreebrata (2007) Singlet diradical complexes of chromium, molybdenum, and tungsten with azo anion radical ligands from M(CO)₆ precursors Inorganic Chemistry, 46 (21). pp. 8584-8593. ISSN 0020-1669

Ghumaan, Sandeep ; Sarkar, Biprajit ; Chanda, Nripen ; Sieger, Monika ; Fiedler, Jan ; Kaim, Wolfgang ; Lahiri, Goutam Kumar (2006) 2,2'-dipyridylketone (dpk) as ancillary acceptor and reporter ligand in complexes [(dpk)(Cl)Ru(μ -tppz)Ru(Cl)(dpk)]ⁿ⁺ where tppz = 2,3,5,6-Tetrakis(2-pyridyl)pyrazine Inorganic Chemistry, 45 (19). pp. 7955-7961. ISSN 0020-1669

Patra, Srikanta ; Sarkar, Biprajit ; Maji, Somnath ; Fiedler, Jan ; Urbanos, Francisco A. ; Jimenez-Aparicio, Reyes ; Kaim, Wolfgang ; Lahiri, Goutam Kumar (2005) Controlling metal–ligand–metal oxidation state combinations by ancillary ligand (L) variation in the redox systems [L₂Ru(μ-boptz)RuL₂]ⁿ, boptz=3,6-bis(2-oxidophenyl)-1,2,4,5-tetrazine, and L=acetylacetonate, 2,2'-bipyridine, or 2-phenylazopyridine Chemistry - A European Journal, 12 (2). pp. 489-498. ISSN 0947-6539

Maji, Somnath ; Sarkar, Biprajit ; Patra, Srikanta ; Fiedler, Jan ; Mobin, Shaikh M. ; Puranik, Vedavati G. ; Kaim, Wolfgang ; Lahiri, Goutam Kumar (2005) Metal-induced reductive ring opening of 1,2,4,5-tetrazines: three resulting coordination alternatives, including the new non-innocent 1,2-diiminohydrazido(2-) bridging ligand system Inorganic Chemistry, 45 (3). pp. 1316-1325. ISSN 0020-1669

Kar, Sanjib ; Sarkar, Biprajit ; Ghumaan, Sandeep ; Roy, Dipankar ; Urbanos, Francisco A. ; Fiedler, Jan ; Sunoj, Raghavan B. ; Jimenez-Aparicio, Reyes ; Kaim, Wolfgang ; Lahiri, Goutam Kumar (2005) A new coordination mode of the photometric reagent glyoxalbis(2-hydroxyanil) (H₂gbha): bis-bidentate bridging by gbha^2- in the redox series {(μ-gbha)[Ru(acac)₂]₂}ⁿ (n = -2, -1, 0, +1, +2), Including a Radical-Bridged Diruthenium(III) and a Ru^III/Ru^IV Intermediate Inorganic Chemistry, 44 (24). pp. 8715-8722. ISSN 0020-1669

Sarkar, Biprajit ; Patra, Srikanta ; Fiedler, Jan ; Sunoj, Raghavan B. ; Janardanan, Deepa ; Mobin, Shaikh M. ; Niemeyer, Mark ; Lahiri, Goutam Kumar ; Kaim, Wolfgang (2005) Theoretical and experimental evidence for a new kind of spin-coupled singlet species: isomeric mixed-valent complexes bridged by a radical anion ligand Angewandte Chemie International Edition, 44 (35). pp. 5655-5658. ISSN 1433-7851

Sarkar, Biprajit ; Patra, Srikanta ; Fiedler, Jan ; Sunoj, Raghavan B. ; Janardanan, Deepa ; Mobin, Shaikh M. ; Niemeyer, Mark ; Lahiri, Goutam Kumar ; Kaim, Wolfgang (2005) Theoretical and experimental evidence for a new type of spin-coupled singlet species: isomeric mixed-valence complexes with bridging radical anion ligands Angewandte Chemie, 44 (35). pp. 5655-5658. ISSN 0044-8249

Kar, Sanjib ; Sarkar, Biprajit ; Ghumaan, Sandeep ; Janardanan, Deepa ; Slageren, Joris van ; Fiedler, Jan ; Puranik, Vedavati G. ; Sunoj, Raghavan B. ; Kaim, Wolfgang ; Lahiri, Goutam Kumar (2005) 2,5-dioxido-1,4-benzoquinonediimine (H₂L²-), a hydrogen-bonding noninnocent bridging ligand related to aminated topaquinone: different oxidation state distributions in complexes [{(bpy)₂Ru}₂(μ-H₂L)]ⁿ (n=0,+,2+,3+,4+) and [{(acac)₂Ru}₂(μ-H₂L)]^m (m=2-,-,0,+,2+) Chemistry - A European Journal, 11 (17). pp. 4901-4911. ISSN 0947-6539

Kar, Sanjib ; Sarkar, Biprajit ; Ghumaan, Sandeep ; Janardanan, Deepa ; van Slageren, Joris ; Fiedler, Jan ; Puranik, Vedavati G. ; Sunoj, Raghavan B. ; Kaim, Wolfgang ; Lahiri, Goutam Kumar (2005) 2,5-dioxido-1,4-benzoquinonediimine (H₂L²⁻), a hydrogen-bonding noninnocent bridging ligand related to aminated topaquinone: different oxidation state distributions in complexes [{(bpy)₂Ru}₂(μ-H₂L)]ⁿ (n = 0,+,2+,3+,4+) and [{(acac)₂Ru}₂(μ-H₂L)]^m (m = 2−,−,0,+,2+) Chemistry - A European Journal, 11 (17). pp. 4901-4911. ISSN 0947-6539

Ghumaan, Sandeep ; Sarkar, Biprajit ; Patra, Srikanta ; Slageren, Joris van ; Fiedler, Jan ; Kaim, Wolfgang ; Lahiri, Goutam Kumar (2005) Sensitive oxidation state ambivalence in unsymmetrical three-center (M/Q/M) Systems [(acac)₂Ru(μ-Q)Ru(acac)₂]ⁿ, Q = 1,10-phenanthroline-5,6-dione or 1,10-phenanthroline-5,6-diimine (n = +, 0, -, 2-) Inorganic Chemistry, 44 (9). pp. 3210-3214. ISSN 0020-1669

Sarkar, Sounak ; Sarkar, Biprajit ; Chanda, Nripen ; Kar, Sanjib ; Mobin, Shaikh M. ; Fiedler, Jan ; Kaim, Wolfgang ; Lahiri, Goutam Kumar (2005) Complex series [Ru(tpy)(dpk)(X)]ⁿ⁺ (tpy = 2,2':6',2''-terpyridine; dpk = 2,2'-dipyridyl ketone; X = Cl-, CH₃CN, NO₂(-), NO⁺, NO*, NO^-): substitution and electron transfer, structure, and spectroscopy Inorganic Chemistry, 44 (17). pp. 6092-6099. ISSN 0020-1669

Patra, Srikanta ; Sarkar, Biprajit ; Ghumaan, Sandeep ; Fiedler, Jan ; Kaim, Wolfgang ; Lahiri, Goutam Kumar (2004) Isovalent and mixed-valent diruthenium complexes [(acac)₂Ru^II (μ-bpytz)Ru^II(acac)₂] and [(acac)₂Ru^II(μ-bpytz)Ru^III(acac)₂](ClO₄) (acac = acetylacetonate and bpytz = 3,6-bis(3,5-dimethylpyrazolyl)-1,2,4,5-tetrazine): synthesis, spectroelectrochemical, and EPR investigation Inorganic Chemistry, 43 (19). pp. 6108-6113. ISSN 0020-1669

Chanda, Nripen ; Sarkar, Biprajit ; Kar, Sanjib ; Fiedler, Jan ; Kaim, Wolfgang ; Lahiri, Goutam Kumar (2004) Mixed valence aspects of diruthenium complexes [{(L)ClRu}₂(μ -tppz)]ⁿ⁺ incorporating 2-(2-pyridyl)azoles (L) as ancillary functions and 2,3,5,6-tetrakis(2-pyridyl)pyrazine (tppz) as bis-tridentate bridging ligand Inorganic Chemistry, 43 (16). pp. 5128-5133. ISSN 0020-1669

Patra, Srikanta ; Sarkar, Biprajit ; Ghumaan, Sandeep ; Fiedler, Jan ; Záliš, Stanislav ; Kaim, Wolfgang ; Lahiri, Goutam Kumar (2004) {(µ-L)[Ru^II(acac)₂]₂}ⁿ, 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 intermediates Dalton Transactions (5). pp. 750-753. ISSN 0300-9246

Ghumaan, Sandeep ; Sarkar, Biprajit ; Patra, Srikanta ; Parimal, Kumar ; van Slageren, Joris ; Fiedler, Jan ; Kaim, Wolfgang ; Lahiri, Goutam Kumar (2004) 3,6-Bis(2-pyridyl)pyridazine (L) and its deprotonated form (L - H⁺)^- as ligands for {(acac)₂Ruⁿ⁺} or {(bpy)₂^Rum+}: investigation of mixed valency in [{(acac)₂Ru}₂(μ -L - H⁺)]⁰ and [{(bpy)₂Ru}₂(μ-L - H⁺)]⁴⁺ by spectroelectrochemistry and EPR Dalton Transactions (004). pp. 706-712. ISSN 0300-9246

Patra, Srikanta ; Sarkar, Biprajit ; Ghumaan, Sandeep ; Fiedler, Jan ; Kaim, Wolfgang ; Lahiri, Goutam Kumar (2004) The triruthenium complex [{(acac)₂Ru^II}₃(L)] containing a conjugated diquinoxaline[2,3-a:2',3'-c]phenazine (L) bridge and acetylacetonate (acac) as ancillary ligands. Synthesis, spectroelectrochemical and EPR investigation Dalton Transactions (5). pp. 754-758. ISSN 0300-9246

Sarkar, Biprajit ; Kaim, Wolfgang ; Klein, Axel ; Schwederski, Brigitte ; Fiedler, Jan ; Duboc-Toia, Carole ; Lahiri, Goutam K. (2003) What a difference ancillary thienyl makes: unexpected additional stabilization of the diruthenium(III,II) but not the diosmium(III,II) mixed-valent state in tetrazine ligand-bridged complexes Inorganic Chemistry, 42 (20). pp. 6172-6174. ISSN 0020-1669

Chanda, Nripen ; Sarkar, Biprajit ; Fiedler, Jan ; Kaim, Wolfgang ; Lahiri, Goutam Kumar (2003) Synthesis and mixed valence aspects of [{(L)ClRu}₂(μ-tppz)]ⁿ⁺ incorporating 2,2-dipyridylamine (L) as ancillary and 2,3,5,6-tetrakis(2-pyridyl)pyrazine (tppz) as bridging ligand Dalton Transactions (18). pp. 3550-3555. ISSN 1477-9226