A key step in the formation of acrylic acid from CO2 and ethylene: the transformation of a nickelalactone into a nickel-acrylate complex.
- R. Fischer, J. Langer, Astrid Malassa, D. Walther, H. Görls, G. Vaughan
- ChemistryChemical Communications
- 6 June 2006
The reaction of a nickelalactone with dppm, resulting in the formation of a stable binuclear Ni(I) complex with an acrylate, a Ph2P- and a dppm bridge, models a key step in the formation of acrylic…
Heavy Grignard reagents: challenges and possibilities of aryl alkaline earth metal compounds.
- M. Westerhausen, M. Gärtner, R. Fischer, J. Langer, Lian Yu, M. Reiher
- 27 July 2007
First results from quantum chemical calculations on diaryl dicalcium(I) suggest a long Ca-- Ca bond with a considerable Ca--Ca bond dissociation energy.
Post‐Grignard Reagents: Influence of the Coligands L on the Molecular Structures of Phenylcalcium Iodides [(L)nCa(R)I] and Calcium Diiodides [(L)nCaI2]
- J. Langer, Sven Krieck, R. Fischer, H. Görls, M. Westerhausen
- 1 June 2010
Iodide is a very soft and large anion and as such its extreme ability to be polarized leads to a flat energy surface with respect to the variation of the Ca–I distances in [(L)nCaI2] and…
Synthesis and Spectroscopic Properties of Arylcalcium Halides
- R. Fischer, M. Gärtner, H. Görls, M. Westerhausen
- 1 July 2006
The direct synthesis of activated calcium with aryl halides in tetrahydrofuran (THF) gave the following compounds of the type RCaX in fair to good yields: [Mescal(THF) 4 ] (1), [(p-tolyl)CaI(THF) 4 ]…
THF solvates of extremely soluble bis(2,4,6-trimethylphenyl)calcium and tris(2,6-dimethoxyphenyl)dicalcium iodide.
- R. Fischer, M. Gärtner, H. Görls, Lian Yu, M. Reiher, M. Westerhausen
- ChemistryAngewandte Chemie
- 26 February 2007
Syntheses and Structure of the Solvent-Separated Calcium Cuprate [(thf)3Ca(μ-Ph)3Ca(thf)3]+[Ph−Cu−Ph]-
- R. Fischer, and Helmar Görls, M. Westerhausen
- 5 June 2007
The transmetalation of phenylcopper yields the solvent-separated cuprate [(thf)3Ca(μ-Ph)3Ca(thf)3]+[Ph−Cu−Ph]-. This derivative extends the known classes of organic calcium compounds by an…
Coordination Behavior of Calcocene and Its Use as a Synthon for Heteroleptic Organocalcium Compounds
- R. Fischer, J. Langer, Sven Krieck, H. Görls, M. Westerhausen
- 18 February 2011
The insoluble calcocene Ca(η5-C5H5)2 readily dissolves after addition of Lewis bases. Monodentate donor solvents such as tetrahydrofuran (thf), pyridine (py), and tetrahydropyran (thp) form complexes…
Metal complexes with 2,3-bis(diphenylphosphino)-1,4-diazadiene ligands: synthesis, structures, and an intramolecular metal-mediated [4 + 2] cycloaddition employing a benzene ring as a dienophile.
- D. Walther, Stefan Liesicke, L. Böttcher, R. Fischer, H. Görls, G. Vaughan
- ChemistryInorganic Chemistry
- 27 January 2003
The same type of ring-closing reaction followed by a tautomerization reaction to form the mononuclear compound 6 occurred by dissolution of the binuclear complex 4 in methanol.
Reactive Intermediates of the Catalytic Carbomagnesation Reaction: Isolation and Structures of [Cp2ZrEt]2(μ-ethene), [Cp2Zr(ethene)(L)] (L = THF, Pyridine), and [(indenyl)2Zr(ethene)(THF)] and of…
- R. Fischer, D. Walther, and Peter Gebhardt, H. Görls
- 27 May 2000
The reaction between Cp2ZrCl2 and 2 equiv of EtMgCl in THF at 0 °C results in the formation of the binuclear complex [Cp2Zr(Et)]2(μ-ethene) (1) in good yield. An X-ray crystallographic structure…
Selective Intermolecular Coupling of Alkynes with Nitriles and Ketones via β,β‘ Carbon−Carbon Bond Cleavage of Zirconacyclopentenes
- Tamotsu Takahashi, C. Xi, E. Negishi
- 12 September 1998
Selective intermolecular coupling of alkynes with nitriles and ketones was performed by the reaction of a mixture of alkynes and Cp2ZrEt2 with nitriles and ketones, respectively. Hydrolysis of the…