1,6-Heptadien-Nickel(0)-Komplexe: rac/meso-(μ-η<sup>2</sup>,η<sup>2</sup>-C<sub>7</sub>{Ni( η<sup>2</sup>,η<sup>2</sup>-C<sub>7</sub>H<sub>12</sub>)}<sub>2</sub> und L-Ni(η<sup>2</sup>,η<sup>2</sup>-C<sub>7</sub>H<sub>12</sub>)
- Proft, B.
- Pörschke, K.
- Lutz, F.
- Krüger, C.
DOIAbstract
Ni(CDT) dissolves in 1,6-heptadiene with displacement of the CDT to yield the dinuclear homoleptic product rac/meso-(μ- η2,η2-C7H12){Ni(η2, η2-C7H12)}2 (1) as a mixture of stereoisomers, in which the nickel atoms are trigonal-planar coordinated by a chelating 1,6-diene ligand and one C=C bond of a bridging diene ligand. The stereoisomers differ in the coordination mode of the bridging diene ligand.-The bridging diene ligand in 1 can be displaced by various donor/acceptor molecules. In pentane, 1 reacts with ethene to yield a solution of mononuclear (C2H4)Ni(η2,η2-C7H12) (2). With alkynes unstable complexes are formed of which the anticipated ethyne derivative (C2H2)Ni(η2,η2-C7H12) (3) decomposes explosively at – 100°C. With isocyanides, met...
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