Stabilized Dialkylnickel Compounds

Wilke, Günther; Herrmann, G.

doi:10.1002/anie.196605811

Cited by 61 publications

(23 citation statements)

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“…It was first prepared by Wilke in 1966 and has since found many uses in chemical synthesis due to the ease of oxidation of the nickel [1,2,3]. The crystal structure was studied and solved by Direks and Dietrich where the nickel was shown to be in a quasitetrahedral environment with carbon-carbon double bonds coordinated to the diamagnetic Ni atom [4].…”

Section: Introductionmentioning

confidence: 99%

A Magnetic Study of Low Moment Nickel Clusters Formed from the Solid-State Decomposition Reaction of Nickel bis-1,5-Cyclooctadiene

2013

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(2013) 'A magnetic study of low moment nickel clusters formed from the solid-state decomposition reaction of nickel bis-1,5-cyclooctadiene.', Journal of custer science., 24 (4).pp. 1057-1066. Further information on publisher's website:http://dx.doi.org/10.1007/s10876-013-0597-9Publisher's copyright statement:The nal publication is available at Springer via http://dx.doi.org/10.1007/s10876-013-0597-9.Additional information: Use policyThe full-text may be used and/or reproduced, and given to third parties in any format or medium, without prior permission or charge, for personal research or study, educational, or not-for-prot purposes provided that:• a full bibliographic reference is made to the original source • a link is made to the metadata record in DRO • the full-text is not changed in any way The full-text must not be sold in any format or medium without the formal permission of the copyright holders.Please consult the full DRO policy for further details. (COD)2) is reported. The material is shown to be a mixed phase magnetic system where the Ni(COD)2 behaves as a diamagnet containing a paramagnetic component at low temperatures which we believe consists of elemental Ni clusters arising from the decomposition of the material. The magnetic response of the Ni clusters can be described by the combination of two Langevin functions, which indicate cluster magnetic moments of 1.8 µB and 15 µB suggesting Nin clusters with n = 2 − 3 and n = 14 − 19. However, we demonstrate that these clusters appear to show a spin transition to an S = 0 state at low temperatures, which may be a consequence of interactions between the clusters and the surrounding organic medium. Nevertheless, our results suggest that Ni(COD)2 is a novel material for the study of Ni clusters embedded in a diamagnetic background material.

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Section: Introductionmentioning

confidence: 99%

A Magnetic Study of Low Moment Nickel Clusters Formed from the Solid-State Decomposition Reaction of Nickel bis-1,5-Cyclooctadiene

2013

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“…Mond quickly realized the significance of this discovery and developed a technical process for purifying nickel based upon the formation and decomposition of the carbonyl. 20 years later, in an obituary for Mond, Langer''] described the beginnings:…”

Section: Introduction and Historical Developmentmentioning

confidence: 99%

Contributions to Organo‐Nickel Chemistry

Wilke

1988

Angew. Chem. Int. Ed. Engl.

547

255

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One hundred years of organonickel chemistry have generated a wealth of new knowledge and a history of examples of accidental discoveries which have finally led to industrial applications. The historical development is associated with the names of Mond, Sabatier, Reppe and Ziegler and, with the methods and techniques available today, many of the original discoveries and unsolved problems are attracting renewed attention. For example, 70 years were to go by before a synthesis first conceived by Sabatier could finally be realized. The path leading from nickel-catalyzed hydrogenation to highly enantioselective homogeneous catalysts is one of the contributions to organonickel chemistry which is described here.

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“…That is confirmed by a dark deposit which precipitates directly after both catalyst components are mixed together at higher temperatures. Low stability of nickel complexes is known from literature reports, and it was demonstrated in [16] that dialkyl-(2,2'-bipyridyl)nickel compounds are decomposed by addition of trialkylaluminum compounds with separation of elemental nickel.…”

Section: Complexmentioning

confidence: 99%

Bidentate [N, N] nickel complexes with salen type ligands for polymerization of methyl methacrylate

Białek

Czaja²,

Niewiadomska³

2008

Polimery

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Bidentate [N, N] nickel complexes with salen type ligands for polymerization of methyl methacrylate RAPID COMMUNICATION Summary-Nickel complexes with bidentate [N,N] salen type ligands activated by different organoaluminium compounds, within which methylalumoxane (MAO) turned out to be the best, were studied in methyl methacrylate (MMA) polymerization. Activity of the investigated complexes was found to increase with increasing Al/Ni molar ratio. The studied catalytic systems were found to produce high molecular weight (Mw = 280 000-560 000) poly(methyl methacrylate) (PMMA) with rich syndiotactic microstructure. Activity of the catalyst as well as Mw and glass transition temperature (Tg) of poly(methyl methacrylate) (PMMA) are dependent on polymerization temperature and they reach maximum values for reaction temperature about 30 o C.

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Stabilized Dialkylnickel Compounds

Cited by 61 publications

References 1 publication

A Magnetic Study of Low Moment Nickel Clusters Formed from the Solid-State Decomposition Reaction of Nickel bis-1,5-Cyclooctadiene

A Magnetic Study of Low Moment Nickel Clusters Formed from the Solid-State Decomposition Reaction of Nickel bis-1,5-Cyclooctadiene

Contributions to Organo‐Nickel Chemistry

Bidentate [N, N] nickel complexes with salen type ligands for polymerization of methyl methacrylate

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