Concept

Cyclopentadienyl complex

Publications associées (72)

Organometallic complexes that interconvert between trimeric and monomeric structures as a function of pH and their effect on human cancer and fibroblast cells

Paul Joseph Dyson, Rosario Scopelliti, Kay Severin, Wee Han Ang, Zacharias Immanuel Grote

Organometallic half-sandwich complexes based on ruthenium with aminomethyl-substituted 3-hydroxy-2-pyridone ligands exist in aqueous solution as monomeric O,O′-chelate complexes or trimeric metallamacrocycles depending upon the pH. We hypothesized that adm ...

2009

Arene-ruthenium complexes with ferrocene-derived ligands: Synthesis and characterization of complexes of the type [Ru(η6-arene)(NC5H4CH2NHOC-C5H4FeC5H5)Cl2] and [Ru(η6-arene)(NC3H3N(CH2)2O2C-C5H4FeC5H5)Cl2]

Paul Joseph Dyson, Anna Katherine Renfrew

Pyridylferrocene and imidazolylferrocene arene-Ru complexes [Ru(η6-arene)(L)Cl2] where L = NC5H4CH2NHOCC5H4FeC5H5, arene = p-iPrC6H4Me (1) or C6Me6 (2); L = NC3H3N(CH2)2O2CC5H4FeC5H5, arene = p-iPrC6H4Me (3) or C6Me6 (4), and diruthenium-arene complexes [R ...

2009

Atom-Transfer Radical Addition Reactions Catalyzed by RuCp* Complexes: A Mechanistic Study

Kay Severin, Andrzej Sienkiewicz, Katarzyna Pierzchala, Gregor Kiefer, Katrin Anne Thommes

Kinetic and spectroscopic analyses were performed to gain information about the mechanism of atom-transfer radical reactions catalyzed by the complexes [RuCl2Cp*(PPh3)] and [RuClCp*(PPh3)2] (Cp*=pentamethylcyclopentadienyl), in the presence and in the abse ...

2009

Expanding the Size of Organometallic Nanostructures: A Hexanuclear (Cymene)Ru Cylinder with a Length of more than 3 nm

Rosario Scopelliti, Kay Severin

Coordination cages based on organometallic half-sandwich complexes are of interest, because they can display unique structures and host properties. This communication describes the synthesis and structure of a cylindrical nanostructure containing six (p-cy ...

2009

Chelating NHC Ruthenium(II) Complexes as Robust Homogeneous Hydrogenation Catalysts

Gabor Laurenczy, Antonia Neels

A series of ruthenium(II) N-heterocyclic carbene chelate complexes were prepd. by using bidentate chelating alkene-carbene, thioether-carbene, carboxylate-carbene and bis-carbene ligands. Metalation of 1-R-3-X-imidazolium salts (1-3, R = Me, X = allyl, MeS ...

2009

Importance of the p-Ligand: Remarkable Effect of the Cyclopentadienyl Ring on the Cytotoxicity of Ruthenium PTA Compounds

Paul Joseph Dyson, Rosario Scopelliti, Kay Severin, Claudine Scolaro, Barnali Dutta

The water-sol. complexes [(Cp'OR)RuCl(PTA)2] (Cp'OR = h5-1-alkoxy-2,4-di-tert-butyl-3-neopentylcyclopentadienyl; R = Me, Et; PTA = 1,3,5-triaza-7-phosphaadamantane) are considerably more cytotoxic (.apprx.2 orders of magnitude) than the cyclopentadienyl an ...

2008

Nonenzymic polycyclisation of analogues of oxidosqualene with a preformed C-ring

Philip Pattison

Some nonenzymic epoxide-initiated polyolefin cyclisations are reported. The presented molecules are partially constrained analogues of (3S)-oxidosqualene, the natural substrate to many important cyclase enzymes. These model compounds feature a preformed C- ...

2008

Dynamics of silica-supported catalysts determined by combining solid-state NMR spectroscopy and DFT calculations

Frédéric Blanc, David Lyndon Emsley

The molecular dynamics of a series of organometallic complexes covalently bound to amorphous silica surfaces is determined experimentally using solid-state nuclear magnetic resonance (NMR) spectroscopy and density functional theory calculations (DFT). The ...

AMER CHEMICAL SOC2008

Aqueous phase carbon dioxide and bicarbonate hydrogenation catalyzed by cyclopentadienyl ruthenium complexes

Paul Joseph Dyson, Gabor Laurenczy, Antoine Dorcier

The water-sol. ruthenium(II) complexes [Cp'RuX(PTA)2]Y and [CpRuCl(PPh3)(mPTA)]OTf (Cp' = Cp, Cp*, X = Cl and Y = nil; or X = MeCN and Y = PF6; PTA = 1,3,5-triaza-7-phosphaadamantane; mPTA = 1-methyl-1,3,5-triaza-7-phosphaadamantane) were used as catalyst ...

2007

Metal-based chemosensors for amino acids, peptides, and nucleotides

Andrey Buryak

An organometallic 4d transition metal complex [CpRhCl2]2, together with commercially available dyes, was used to construct indicator displacement assays (IDAs) for the detection of peptides, amino acids, and nucleotides. The combination of the CpRh compl ...

EPFL2007

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