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Übergangsmetallkomplexe mit Nitroxidradikalen: Palladium-, Platin-, Pentamethylcyclopentadienyl-rhodium- und -iridium-Komplexe sowie α-Aminocarboxylatkomplexe mit Donor-haltigen Derivaten des 2,5-Dihydroimidazol-l-oxyls / Transition Metal Complexes of Nitroxide Radicals, Palladium, Platinum, Pentamethylcyclopentadienyl Rhodium and Iridium Complexes, and α-Aminocarboxylate Complexes with Derivatives of 2,5-Dihydroimidazole-l-oxyls
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Frank Hintermaier
Published/Copyright:
June 2, 2014
2,5-Dihydroimidazoline-l-oxyl radicals I, II with imino substituents coordinate to Pd(II) and Pt(II) complexes with formation of the N,N chelate complexes 1-6. With oxygen containing substituents either monodentate N-coordination to give 8 or N ,O chelate formation to give 9 takes place, depending on the position of the oxygen atom relative to the ring nitrogen atom. With radicals III that also have the second ring nitrogen atom oxidized and the Rh(III) or Ir(III) complexes [Cp*MCl2]2 the O , O chelates 11 -13 could be obtained, while with Na2PdCl4 the heterocycle was destroyed with formation of a N,N chelate complex 10 of an α-nitrosooxime ligand. The orthopalladated 2,2,5,5 tetramethyl-4-phenyl-2,5-dihydroimidazoline-l-oxyl complex 7a reacts with several a-amino acidates under splitting of the dichloro bridge with formation of the C,N/N,O-bis-chelate complexes 7b-f. The molecular structures of 2 and 10 were determined by X-ray diffraction.
Received: 1997-9-4
Published Online: 2014-6-2
Published in Print: 1998-1-1
© 1946 – 2014: Verlag der Zeitschrift für Naturforschung
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Articles in the same Issue
- Titelei
- Contents
- Über CuDy2[B8O16] und CuHo2[B8O16]: Zwei neue „Metaborate“ mit einem ∞1[B8O16]8--Anion / On CuDy2[B8O16] and CuHo2[B8O16] Two New „Metaborates“ with a ∞1[B8O16]8-Anion
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- Enantioselective Catalysis, 122 [1] Synthesis of New Optically Active 3,5-DinitrosalicyloxazoIines
- ERRATUM
