Search Results - "Koval, Iryna A"

Synthetic models of the active site of catechol oxidase: mechanistic studies by Koval, Iryna A, Gamez, Patrick, Belle, Catherine, Selmeczi, Katalin, Reedijk, Jan

“…The ability of copper proteins to process dioxygen at ambient conditions has inspired numerous research groups to study their structural, spectroscopic and…”
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Bio-mimicking galactose oxidase and hemocyanin, two dioxygen-processing copper proteins by Gamez, Patrick, Koval, Iryna A, Reedijk, Jan

“…The modelling of the active sites of metalloproteins is one of the most challenging tasks in bio-inorganic chemistry. Copper proteins form part of this…”
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Determining recommended acceptable intake limits for N-nitrosamine impurities in pharmaceuticals: Development and application of the Carcinogenic Potency Categorization Approach (CPCA) by Kruhlak, Naomi L., Schmidt, Marianne, Froetschl, Roland, Graber, Stefan, Haas, Bodo, Horne, Irene, Horne, Stephen, King, Sruthi T., Koval, Iryna A., Kumaran, Govindaraj, Langenkamp, Anja, McGovern, Timothy J., Peryea, Tyler, Sanh, Alan, Siqueira Ferreira, Aline, van Aerts, Leon, Vespa, Alisa, Whomsley, Rhys

“…N-Nitrosamine impurities, including nitrosamine drug substance-related impurities (NDSRIs), have challenged pharmaceutical industry and regulators alike and…”
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Catecholase Activity of a Copper(II) Complex with a Macrocyclic Ligand: Unraveling Catalytic Mechanisms by Koval, Iryna A., Selmeczi, Katalin, Belle, Catherine, Philouze, Christian, Saint-Aman, Eric, Gautier-Luneau, Isabelle, Schuitema, Anna Maria, van Vliet, Marcel, Gamez, Patrick, Roubeau, Olivier, Lüken, Matthias, Krebs, Bernt, Lutz, Martin, Spek, Anthony L., Pierre, Jean-Louis, Reedijk, Jan

“…We report the structure, properties and a mechanism for the catecholase activity of a tetranuclear carbonato‐bridged copper(II) cluster with the macrocyclic…”
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Ligand Conformation Enforces Trigonal Bipyramidal Coordination Geometry in a New Dinuclear Bis(pyrazolato)-Bridged Copper(II) Complex:  Synthesis, Crystal Structure, and Properties of [Cu(Npy2pz)]2(ClO4)2·2CH3CN by Tanase, Stefania, Koval, Iryna A, Bouwman, Elisabeth, de Gelder, René, Reedijk, Jan

“…The reaction of Cu(ClO4)2·6H2O with the new tripodal ligand HNpy2pz (N-bis[(pyridin-2-yl)methyl][1H-pyrazol-3-yl)methyl]amine) in the presence of 1 equiv of…”
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Proton NMR Spectroscopy and Magnetic Properties of a Solution-Stable Dicopper(II) Complex Bearing a Single μ-Hydroxo Bridge by Koval, Iryna A, van der Schilden, Karlijn, Schuitema, Anna Maria, Gamez, Patrick, Belle, Catherine, Pierre, Jean-Louis, Lüken, Matthias, Krebs, Bernt, Roubeau, Olivier, Reedijk, Jan

“…The reaction of copper(II) perchlorate with the macrocyclic ligand [22]py4pz in the presence of base leads to formation of a dinuclear complex…”
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The Dicopper(II) Complex of the Novel Asymmetric Dinucleating Ligand Hpy3asym as a Structural Model of Catechol Oxidase by Koval, Iryna A., Pursche, Daniel, Stassen, Arno F., Gamez, Patrick, Krebs, Bernt, Reedijk, Jan

“…The new asymmetric dinucleating ligand 2‐{[bis(2‐pyridinylmethyl)amino]methyl}‐4‐methyl‐6‐{[(2‐pyridinylmethyl)amino]methyl}phenol (Hpy3asym) has been designed…”
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Catecholase activity of a mu-hydroxodicopper(II) macrocyclic complex: structures, intermediates and reaction mechanism by Koval, Iryna A, Belle, Catherine, Selmeczi, Katalin, Philouze, Christian, Saint-Aman, Eric, Schuitema, Anna Maria, Gamez, Patrick, Pierre, Jean-Louis, Reedijk, Jan

“…The monohydroxo-bridged dicopper(II) complex (1), its reduced dicopper(I) analogue (2) and the trans-mu-1,2-peroxo-dicopper(II) adduct (3) with the macrocyclic…”
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New didentate bispyrazole ligands forming uncommon eight-ring chelates with divalent copper, zinc and cobalt by Schuitema, Anna M, Engelen, Mireille, Koval, Iryna A, Gorter, Syb, Driessen, Willem L, Reedijk, Jan

“…The novel ligands 1,3-bis(pyrazol-1′-yl)propane (bpp) and 1,3-bis(3′,5′-dimethylpyrazol-1′-yl)propane (bdpp) have been prepared by reacting 2 equiv. of the…”
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A New Trinuclear Linear Copper(II) Complex: Unusual Crystal Structure with Semi-Coordinated Thiophene Moieties and Weak Antiferromagnetic Coupling Through the Bridging Imidazolate Rings by Song, Yufei F., Massera, Chiara, Quesada, Manuel, Koval, Iryna A., Gamez, Patrick, Manotti Lanfredi, Anna Maria, Reedijk, Jan

“…A trinuclear copper(II) complex, [Cu3(imthio)2(NO3)4(MeOH)2] [where Himthio is 1,1‐bis(imidazol‐2‐yl)‐3‐(thiophen‐2‐yl)‐2‐azapropane], has been synthesized by…”
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Dinuclear copper(II) complexes of four new pyrazole-containing macrocyclic ligands are active catalysts in the oxidative coupling of 2,6-dimethylphenol by Schuitema, Anna M, Aubel, Peter G, Koval, Iryna A, Engelen, Mireille, Driessen, Willem L, Reedijk, Jan, Lutz, Martin, Spek, Anthony L

“…Four new macrocyclic ligands of varying ring size, [22]py4pz, [22]pr4pz, [18]py2pz and [20]py2pz, containing four or two endocyclic pyrazole groups, form…”
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Century-Known Copper Salt Cu(OAc)(OMe) Proven To Be a Unique Magnetic Lattice Composed of Tetranuclear Copper(II) Species with a Rare Binding Mode of the Acetate Anion by Koval, Iryna A, Gamez, Patrick, Roubeau, Olivier, Driessen, Willem L, Lutz, Martin, Spek, Anthony L, Reedijk, Jan

“…The structure, spectroscopy, and magnetism of a century-old copper salt, Cu(OAc)(OMe), is reported. The crystal structure contains two independent Cu(II) ions,…”
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Proton NMR Spectroscopy and Magnetic Properties of a Solution-Stable Dicopper(II) Complex Bearing a Single μ-Hydroxo Bridge by Koval, Iryna A, van der Schilden, Karlijn, Schuitema, Anna Maria, Gamez, Patrick, Belle, Catherine, Pierre, Jean-Louis, Lüken, Matthias, Krebs, Bernt, Roubeau, Olivier, Reedijk, Jan

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The First Example of a True "Turnbull's Blue" Family Compound with Trapped Iron Oxidation States by Pavlishchuk, Vitaly V., Koval, Iryna A., Goreshnik, Eugeny, Addison, Anthony W., van Albada, Gerard A., Reedijk, Jan

“…The first compound of a true Turnbull′s Blue family [i.e. an iron(II) hexacyanoferrate(III)] complex with valence‐trapped states of iron −…”
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Century-Known Copper Salt Cu(OAc)(OMe) Proven To Be a Unique Magnetic Lattice Composed of Tetranuclear Copper(II) Species with a Rare Binding Mode of the Acetate Anion by Koval, Iryna A, Gamez, Patrick, Roubeau, Olivier, Driessen, Willem L, Lutz, Martin, Spek, Anthony L, Reedijk, Jan

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A remarkable anion effect on the crystal packing of two analogous copper complexes from a thiophene-containing phenol-based ligand by Koval, Iryna A., Sgobba, Maila, Huisman, Mieke, Lüken, Matthias, Saint-Aman, Eric, Gamez, Patrick, Krebs, Bernt, Reedijk, Jan

“…Two related copper complexes show significant structural variations as a result of a remarkable effect of the different anions on the crystal packing. The new…”
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Ligand conformation enforces trigonal bipyramidal coordination geometry in a new dinuclear bis(pyrazolato)-bridged copper(II) complex: synthesis, crystal structure, and properties of [Cu(Npy2pz)]2(ClO4)2.2CH3CN by Tanase, Stefania, Koval, Iryna A, Bouwman, Elisabeth, de Gelder, René, Reedijk, Jan

“…The reaction of Cu(ClO(4))(2).6H(2)O with the new tripodal ligand HNpy(2)pz (N-bis[(pyridin-2-yl)methyl][1H-pyrazol-3-yl)methyl]amine) in the presence of 1…”
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Dinuclear Cu II Complexes with a New Phenol‐Based Ligand Bearing Pyridine and Thiophene Substituents: Synthesis, Characterization and Interaction with Catechol Substrates by Koval, Iryna A., Huisman, Mieke, Stassen, Arno F., Gamez, Patrick, Roubeau, Olivier, Belle, Catherine, Pierre, Jean‐Louis, Saint‐Aman, Eric, Lüken, Matthias, Krebs, Bernt, Lutz, Martin, Spek, Anthony L., Reedijk, Jan

“…Abstract The reaction of the phenol‐based ligand 4‐methyl‐2,6‐bis{[(2‐methylpyridyl)(2‐methylthiophenyl)amino]methyl}phenol(Hpy2th2s), containing pyridine and…”
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Thiophene-containing dinucleating ligands for the copper-catalyzed oxidative coupling of 2,6-dimethylphenol by Huisman, Mieke, Koval, Iryna A., Gamez, Patrick, Reedijk, Jan

“…A series of dinucleating phenol-based ligands bearing thiophenyl groups have been tested on the copper-catalysed polymerisation of 2,6-dimethylphenol and…”
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Ligand Conformation Enforces Trigonal Bipyramidal Coordination Geometry in a New Dinuclear Bis(pyrazolato)-Bridged Copper(II) Complex:  Synthesis, Crystal Structure, and Properties of [Cu(Npy 2 pz)] 2 (ClO 4 ) 2 ·2CH 3 CN by Tanase, Stefania, Koval, Iryna A., Bouwman, Elisabeth, de Gelder, René, Reedijk, Jan

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