Hansjörg Grützmacher


Last Name

Grützmacher

First Name

Hansjörg

ORCID

0000-0002-1531-8906

Organisational unit

01509 - Lehre Chemie u. Ang. Biowiss.

Search Results

Publications1 - 10 of 261
  • Reduction of Nitrous Oxide by Light Alcohols Catalysed by a Low-Valent Ruthenium Diazadiene Complex
    Item type: Journal Article
    Bösken, Jonas; Rodríguez-Lugo, Rafael E.; Nappen, Sven; et al. (2023)
    Chemistry - A European Journal
    Decomposition of the environmentally harmful gas nitrous oxide (N2O) is usually performed thermally or catalytically. Selective catalytic reduction (SCR) is currently the most promising technology for N2O mitigation, a multicomponent heterogeneous catalytic system that employs reducing agents such as ammonia, hydrogen, hydrocarbons, or a combination thereof. This study reports the first homogenous catalyst that performs the reduction of nitrous oxide employing readily available and cheap light alcohols such as methanol, ethanol or ethylene glycol derivatives. During the reaction, these alcohols are transformed in a dehydrogenative coupling reaction to carboxylate derivatives, while N2O is converted to N-2 and H2O, later entering the reaction as substrate. The reaction is catalysed by the low-valent dinuclear ruthenium complex [Ru2H(mu-H)(Me(2)dad)(dbcot)(2)] that carries a diazabutadiene, Me(2)dad, and two rigid dienes, dbcot, as ligands. The reduction of nitrous oxide proceeds with low catalyst loadings under relatively mild conditions (65-80 degrees C, 1.4 bar N2O) achieving turnover numbers of up to 480 and turnover frequencies of up to 56 h(-1).
  • Phosphination of Carbon Monoxide
    Item type: Journal Article
    Puschmann, Florian Frank; Stein, Daniel; Heift, Dominikus; et al. (2011)
    Angewandte Chemie. International Edition
  • Facile Access to NaOC≡As and Its Use as an Arsenic Source To Form Germylidenylarsinidene Complexes
    Item type: Journal Article
    Yao, Shenglai; Grossheim, Yves; Kostenko, Arseni; et al. (2017)
    Angewandte Chemie
  • Selective dehydrogenation of ammonia borane to polycondensated BN rings catalysed by ruthenium olefin complexes
    Item type: Journal Article
    Himmelbauer, Daniel; Müller, Fabian; Schweinzer, Clara; et al. (2024)
    Chemical Communications
    Dehydrogenation of ammonia borane to well-defined products is an important but challenging reaction. A dinuclear ruthenium complex with a Ru-Ru bond bearing a diazadiene (dad) unit and olefins as non-innocent ligands catalyzes the highly selective formation of conjugated polycondensed borazine oligomers (BxNxHy), predominantly B21N21H18, the BN analogue of superbenzene.
  • Snowballing Radical Generation Leads to Ultrahigh Molecular Weight Polymers
    Item type: Journal Article
    Laurino, Paola; Hernandez, Hugo F.; Bräuer, Judith; et al. (2012)
    Macromolecular Rapid Communications
    Styrene is the classical monomer obeying zero‐one kinetics in radical emulsion polymerization. Accordingly, particles that are less than 100 nm in diameter contain either one or no growing radical(s). We describe a unique photoinitiated polymerization reaction accelerated by snowballing radical generation in a continuous flow reactor. Even in comparison to classical emulsion polymerization, these unprecedented snowballing reactions are rapid and high‐yielding, with each particle simultaneously containing more than one growing radical. This is a consequence of photoinitiator incorporation into the nascent polymer backbone and repeated radical generation upon photo‐irradiation.
  • TROPDAD
    Item type: Journal Article
    Breher, Frank; Bühler, Carsten; Frison, Gilles; et al. (2003)
    Chemistry - A European Journal
  • Diamido rhodates(1-)
    Item type: Journal Article
    Maire, Pascal; Breher, Frank; Grützmacher, Hansjörg (2005)
    Angewandte Chemie. International Edition
  • Phosphaketenes as Building Blocks for the Synthesis of Triphospha Heterocycles
    Item type: Journal Article
    Heift, Dominikus; Benkő, Zoltán; Grützmacher, Hansjörg (2014)
    Chemistry - A European Journal
  • A Genuine Trivalent Bis-Acylphosphide (BAP) Complex of Uranium
    Item type: Journal Article
    Hochholzer, Jakob; Waldschmidt, Pablo; Heinemann, Frank W.; et al. (2024)
    European Journal of Inorganic Chemistry
    The genuine trivalent uranium complex, K[UIII(mesBAP)4], employing four bidentate bis(2,4,6-trimethylbenzoyl)phosphide (mesBAP) chelating ligands, is reported and obtained by the reduction of the literature-known tetravalent analog [UIV(mesBAP)4]. Hence, the bis(acyl)phosphide mesBAP ligand allowed to establish a fully reversible redox couple with uranium in the oxidation states +III and +IV. In both complexes [U(mesBAP)4]0/-, the uranium ions are coordinated to four mesBAP ligands in a square antiprismatic geometry. All new compounds have been characterized by single-crystal XRD analysis, 1H and 31P NMR, and UV/Vis/NIR electronic absorption spectroscopy, as well as SQUID magnetization and electrochemical measurements, and CW X-band EPR in the case of the trivalent complex.
  • Cyaarside (CAs−) and 1,3‐Diarsaallendiide (AsCAs2−) Ligands Coordinated to Uranium and Generated via Activation of the Arsaethynolate Ligand (OCAs−)
    Item type: Journal Article
    Hoerger, Christopher J.; Heinemann, Frank W.; Louyriac, Elisa; et al. (2019)
    Angewandte Chemie. International Edition
Publications1 - 10 of 261