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Helmut Schoellhorn

University of Freiburg

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Featured researches published by Helmut Schoellhorn.

Inorganic Chemistry | 1986

Facile substitution of ammonia ligands in a diplatinum(III) complex of 1-methyluracil

Bernhard Lippert; Helmut Schoellhorn; Ulf Thewalt

Etude de la substitution de 2 coordinats NH 3 en disposition cis dans le complexe [Cl(NH 3 ) 2 Pt(1-MeU) 2 Pt(NH 3 ) 2 Cl]Cl 2

Journal of the American Chemical Society | 1986

Additive trans-influences of the axial ligand and metal-metal bond in diplatinum(III) complex leading to an asymmetric structure with penta- and hexacoordination of the two metals.

Bernhard Lippert; Helmut Schoellhorn; Ulf Thewalt

Etude structurale et par RMN du complexe [(NO 2 )(NH 3 ) 2 Pt(1-MeU) 2 Pt(NH 3 ) 2 ] (NO 3 ) 3 •H 2 O avec 1-MeU: anion du methyl-1 uracile

Journal of the American Chemical Society | 1986

Metal-stabilized rare tautomers of nucleobases. 1. Iminooxo form of cytosine: formation through metal migration and estimation of the geometry of the free tautomer

Bernhard Lippert; Helmut Schoellhorn; Ulf Thewalt

Journal of the American Chemical Society | 1985

Simultaneous binding of platinum(II) to three different sites (N7, N1, N3) of a guanine nucleobase

Gabriele Raudaschl-Sieber; Helmut Schoellhorn; Ulf Thewalt; Bernhard Lippert

Journal of the American Chemical Society | 1989

Metal-stabilized rare tautomers of nucleobases. 2. 2-Oxo-4-hydroxo form of uracil: crystal structures and solution behavior of two platinum(II) complexes containing iminol tautomers of 1-methyluracil

Helmut Schoellhorn; Ulf Thewalt; Bernhard Lippert

Journal of the American Chemical Society | 1985

DNA-intrastrand guanine, guanine corss-linking by cisplatin: comparison of three model compounds with head−head orientation of the nucleobases

Helmut Schoellhorn; Gabriele Raudaschl-Sieber; G. Mueller; Ulf Thewalt; Bernhard Lippert

Inorganic Chemistry | 1984

Formation, crystal structure, and EPR spectroscopic properties of a heteronuclear (Pt2,Cu) mixed-nucleobase (1-methylcytosine, 1-methyluracil) complex: bis[(.mu.-1-methyluracilato-N3,O4)(.mu.-1-methylcytosine-N3,O2)-cis-diammineplatinum(II)]copper(II) tetranitrate-6-water

Bernhard Lippert; Ulf Thewalt; Helmut Schoellhorn; David M. L. Goodgame; Robert W. Rollins

Journal of the American Chemical Society | 1986

Unusual four-membered chelate rings of platinum(IV) with a cytosine nucleobase

Helmut Schoellhorn; Rut. Beyerle-Pfnuer; Ulf Thewalt; Bernhard Lippert

Inorganic Chemistry | 1990

Platinum(II) binding to N7 and N1 of guanine and a model for a purine-N1, pyrimidine-N3 cross-link of cisplatin in the interior of a DNA duplex

Gudrun Frommer; Helmut Schoellhorn; Ulf Thewalt; Bernhard Lippert

Inorganic Chemistry | 1987

Formation of platinum [Pt2.25]4-1-methyluracil blue through silver(I) oxidation of [Pt2.0]2 and isolation of a heteronuclear (Pt2,Ag2) precursor

Bernhard Lippert; Helmut Schoellhorn; Ulf Thewalt

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Ulf Thewalt

University of Freiburg

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Bernhard Lippert

Technical University of Dortmund

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Wolfgang Micklitz

Technical University of Dortmund

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Gudrun Frommer

Technical University of Dortmund

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Oliver Renn

Technical University of Dortmund

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David M. L. Goodgame

Imperial College London

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Bernardo Fontal

Princeton University

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Roberto A. Sánchez-Delgado

City University of New York

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