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Formation of a Dynamic η2(O,N)-Hydroxylaminato Zirconocene Complex by Nitrosoarene Insertion into a Zr−C σ-Bond

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posted on 2006-02-13, 00:00 authored by Sarah A. Cummings, Robert Radford, Gerhard Erker, Gerald Kehr, Roland Fröhlich
The reaction of dimethylzirconocene with nitrosobenzene gave the hydroxylaminatozirconium complex 6. Its structure in the solid state was characterized as the N-inside isomer [η2(O,N)-ON(CH3)Ph](CH3)ZrCp2 (6a) by X-ray diffraction. Dynamic 1H NMR spectroscopy indicated a rapid enantiomerization process of the chiral system 6a in solution, probably taking place via a rapid equilibration with a reactive η1(O) isomer.

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    isomerdiffractionenantiomerization processDynamic 1 H NMR spectroscopyComplexPhreactive η 1ZirconoceneHydroxylaminatodimethylzirconocenehydroxylaminatozirconiumsolutionformationequilibrationBondZrCp 2Nitrosoarene InsertionnitrosobenzeneDynamic η 2chiral system 6

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