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- W2034821695 abstract "2-Pyridinamin (Ampy) bildet mit Bisacetylacetonato-cobalt(II) neben dem trans-oktaedrischen Bis-Addukt (Ampy)2Co(acac)2 auch ein Mono-Addukt (Ampy)Co(acac)2 (II). Im Kristallgitter von II liegen tetragonal-pyramidale Moleküle vor, die über intermolekulare Wasserstoffbrücken zu Dimeren zusammentreten. 2-Pyridinamin koordiniert mit dem endo-Stickstoff in apicaler Position. Der kurze CoNendo-Abstand (2,104 Å) weist 2-Pyridinamin als n- und π-Donator aus. Dadurch wird eine weitgehende Absättigung des Koordinationszentrums von II erreicht. Eine Dimerisierung unter Erhöhung der Koordinationszahl auf 6, wie sie bei (CyNH2)Co(acac)2 und (py)Co(acac)2 eintritt, bleibt daher aus. Nur als n-Donator fungiert 2-Pyridinamin im Komplex (Ampy)2Co(acac)2 (CoNendo) = 2,203 Å). Control of the Dimerization of the Cobalt(II) Chelates (N-Ligand)Co(acac)2 by the Amine Ligand Besides the trans-octahedral cis-adduct (Ampy)2Co(acac)2, bis(acetylacetonato)cobalt(II) forms the mono-adduct (Ampy)Co(acac)2 (II). In the solid state tetragonal-pyramidal molecules of II are dimerized by intermolecular hydrogen-bonds. 2-Pyridinamine is coordinated by the endo-nitrogen in an apical position. By the short CoNendo-bond (2.104 Å) 2-pyridinamine proves as an n- and a π-donor. Therefore the coordination center of II is extensively saturated and a dimerization, comparable to that of (CyNH2)Co(acac)2 (Cy = cyclohexyl) and (py)Co(acac)2, which is connected with an increase of the coordination number (5 → 6), is not observed." @default.
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- W2034821695 date "1991-10-01" @default.
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- W2034821695 title "Zur Steuerung der Dimerisierung von Cobalt(II)-Chelaten des Typs (N-Ligand)Co(acac)2 durch den Aminliganden" @default.
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- W2034821695 doi "https://doi.org/10.1002/zaac.19916030102" @default.
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