1,6-Heptadien-Nickel(0)-Komplexe: rac/meso-(μ-η2,η2-C7{Ni( η2,η2-C7H12)}2 und 
L-Ni(η2,η2-C7H12)

Proft, Bernd; Pörschke, Klaus-Richard; Lutz, Frank; Krüger, Carl

doi:10.1002/cber.19911241206

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1,6-Heptadien-Nickel(0)-Komplexe: rac/meso-(μ-η²,η²-C₇{Ni( η²,η²-C₇H₁₂)}₂ und L-Ni(η²,η²-C₇H₁₂)

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Proft, Bernd
Max-Planck-Institut für Kohlenforschung, Max Planck Society;

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Pörschke, Klaus-Richard
Research Group Pörschke, Max-Planck-Institut für Kohlenforschung, Max Planck Society;

Lutz, Frank
Max-Planck-Institut für Kohlenforschung, Max Planck Society;

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Krüger, Carl
Service Department Krüger (XRAY), Max-Planck-Institut für Kohlenforschung, Max Planck Society;

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Citation

Proft, B., Pörschke, K.-R., Lutz, F., & Krüger, C. (1991). 1,6-Heptadien-Nickel(0)-Komplexe: rac/meso-(μ-η²,η²-C₇{Ni( η²,η²-C₇H₁₂)}₂ und L-Ni(η²,η²-C₇H₁₂). Chemische Berichte, 124(12), 2667-2675. doi:10.1002/cber.19911241206.

Cite as: https://hdl.handle.net/11858/00-001M-0000-0024-47D7-B

Abstract

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, methylenephosphoranes, methyllithium, amines, pyridines, phosphanes, and phosphites (i.e. C, N, P donors) crystalline complexes of type L-Ni(η².η² C₇H₁₂) have been obtained, of which the derivatives with L=tBuN=C 4, Me₃PCH₂ 5, LiCH₃ 6, C₇H₁₃N 7, C₅H₅N 8, Me₃P 9, ⁱPr₃P 10, Ph₃P 11, (PhO)₃P 12 are characterized here. For 11 the crystal structure has been determined.