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Schlagwörter:
NICKEL(0) COMPLEXES; DISUBSTITUTED BUTADIYNES; ZIRCONOCENE COMPLEXES; ALKYNE COMPLEXES; CLEAVAGE; BOND; METALLOCENE; TITANOCENE; CUMULENE; LIGANDS
Zusammenfassung:
The reaction of rac/meso-(μ-η2,η2-C7H12){Ni(η2,η2-C7H12)}2 with 2,6-dimethylpyridine (Me2py) affords (Me2py)Ni(η2,η2-C7H12) (1). Complex 1 serves as precursor for the preparation of the Ni(0)-bis(alkyne) complexes (Me2py)Ni(η2-PhC≡CSiMe3)2 (2) and {(Me2py)Ni}2(μ-η2,η2-Me3SiC≡C-C≡CSiMe3)2 (3). The latter is the first complex in which two metal centers are bridged by two butadiyne ligands. For 1–3 the molecular structures have been determined by X-ray crystallography.