Übergangsmetall‐Carbin‐Komplexe, XXXVIII: Carbinligandübertragung durch Umsetzung von neutralen und kationischen Carbinkomplexen mit Octacarbonyldicobalt oder Bis(π‐cyclopentadienyl)nickel

Fischer, Ernst Otto; Däweritz, Albrecht

doi:10.1002/cber.19781111102

Cited by 14 publications

(4 citation statements)

References 18 publications

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“…The electrophilic metallacarbyne Br(CO)4Cr^C-Ph is dimerized in the reaction with the complexes Co2(CO)8 (37%) or Cp2Ni (7.5%). 135 In these reactions, complexes with bridging carbyne ligands like (w3-CPh)Ni3Cp3 are formed as side products.…”

Section: \ Cpmentioning

confidence: 99%

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Carbon-Carbon and Carbon-Heteroatom Coupling Reactions of Metallacarbynes

Engel¹,

Pfeffer²

1995

Chem. Rev.

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Philippus F, Engel was born in Utrecht, The Netherlands, in 1965. He was educated in the State University of Utrecht and specialized in Organometallic Chemistry with Professor G. van Koten in 1989. He then moved to Strasbourg where he obtained his These de I'Universile Louis Pasteur in 1993. The subject of his Ph.D. thesis was on the organometallic chemistry of "Fischer-type" melallacarbynes. He recently joined Shell Research in Amsterdam, The Netherlands, as an associate research chemist.Michel Pfeffer was bom in Alsace in 1948 and he received his Doctorat d'Etal from the Universite Louis Pasteur in 1975. In 1976 he spent one year wth Professor F. G. A. Stone at the University of Bristol. Since 1973 he has held a position in the CNRS at ULP Strasbourg where he became Directeur de Recherche in 1985. His main research interests are in the field of organomelallic chemistry with an emphasis on metalmediated syntheses of carbon-carbon and carbon-heteroatom bonds.

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Section: \ Cpmentioning

confidence: 99%

“…The metallacarbyne [Cp(OC)2Mn=C-Ph]+ reacts with diaminoalkynes to give cyclopropenium compounds in moderate yields, thereby liberating the organic ring fragment (eq 135). 174,197 [Cp(OC)2MriHC-Ph] R2NC=CNR2 -"Cp(OC)2Mn" R2N Fh (135)…”

Section: B Other Organic Productsmentioning

confidence: 99%

Carbon-Carbon and Carbon-Heteroatom Coupling Reactions of Metallacarbynes

Engel¹,

Pfeffer²

1995

Chem. Rev.

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“…The mixture was then allowed to react overnight to give a green solution. The solvent was removed to give a green solid (30…”

Section: Preparation Of Cp*wco 2 (Co) 8 (L 3 -Cf) 16mentioning

confidence: 99%

“…28 However, the triple bond characteristics of the Mo CF subunit were demonstrated computationally and also chemically by its reaction with Co 2 (CO) 8 to give the m 3 -CF cluster complex 7; this reaction is typical of triple bonds in alkynes and other terminal metal-alkylidyne complexes. [29][30][31][32] The straightforward synthesis and stability of 6 led us to attempt to complete the rest of the Group 6 family of CF analogues. We subsequently devised methodology to produce the required CF 3 ligand precursors 33 and here we report full details of their reduction to afford terminal fluoromethylidyne compounds of all the Group 6 metals.…”

Section: Introductionmentioning

confidence: 99%

Synthesis and structural characterization of group 6 transition metal complexes with terminal fluoromethylidyne (CF) ligands; a DFT/NBO/NRT comparison of bonding characteristics of terminal NO, CF and CH ligands

2011

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A family of group 6 transition metal complexes M(C(5)R(5))(CO)(2)(CF) [M = Cr, Mo, W; R = H, Me] with terminal fluoromethylidyne ligands have been synthesized through the reduction of the corresponding trifluoromethyl precursors with potassium graphite or magnesium graphite. They have been characterized spectroscopically and in some cases crystallographically, although the structures show disorder between the CO and CF ligands. The M[triple bond]CF subunit reacts as a triple bond to form cluster complexes containing μ(3)-CF ligands on reaction with Co(2)(CO)(8). Computational (DFT/NBO/NRT) studies on M(C(5)H(5))(CO)(2)(CF) [M = Cr, Mo, W] and the corresponding cationic fragments M(CO)(2)(XY)(+) illustrate significant differences in the metal-ligand bonding between CF and its isoelectronic analogue NO, as well as with its hydrocarbon analogue CH.

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Übergangsmetall‐Carbin‐Komplexe, XXXIX: Synthese, Struktur und elektrochemisches Verhalten von trans‐Halogenotetracarbonyl(ferrocenylcarbin)‐Komplexen des Chroms, Molybdäns und Wolframs

et al. 1978

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The reaction of pentacarbonyl(ethoxyferrocenylcarbene) complexes of chromium, molybdenum, and tungsten with boron-and aluminium halides (MX,; X=Cl, Br) at low temperatures yields trans-halogenotetracarbonyl(ferroceny1carbyne) complexes (1 -5). The analogous iodo complexes (6, 7) are obtained by a halogen exchange reaction of the trans-bromotetracarbonyl(ferroceny1-carbyne) complexes with lithium iodide. The results of spectroscopic and electrochemical measurements of the novel complexes together with the X-ray structure of 2 are reported. Praparative ErgebnissePentacarbonyl(ethoxyferrocenylcarben)chrom, -molybdan und -wolfram reagieren mit Aluminiumhalogeniden A1,X6 (X = C1, Br) in Methylenchlorid Linter Abspaltung der Ethoxygruppe sowie eines CO-Liganden und gleichzeitigem Einbau eines Halogenatoms zu trans-Halogenotetracarbonyl(ferrocenylcarbin)-Komplexen. Das zunachst gebildete Addukt aus Carbinverbindung und Aluminiumhalogenid wird durch Zugabe von Methanol zerstort, wobei auch uberschussiges A1,X6 hydrolysiert. Die Darstellung von trans-Tetracarbonylchloro(ferroceny1carbin)chrom (1) gelang mit Al,C16 nicht, hier fuhrte BC1, zum Erfolg.

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Übergangsmetall‐Carbin‐Komplexe, XXXVIII: Carbinligandübertragung durch Umsetzung von neutralen und kationischen Carbinkomplexen mit Octacarbonyldicobalt oder Bis(π‐cyclopentadienyl)nickel

Cited by 14 publications

References 18 publications

Carbon-Carbon and Carbon-Heteroatom Coupling Reactions of Metallacarbynes

Carbon-Carbon and Carbon-Heteroatom Coupling Reactions of Metallacarbynes

Synthesis and structural characterization of group 6 transition metal complexes with terminal fluoromethylidyne (CF) ligands; a DFT/NBO/NRT comparison of bonding characteristics of terminal NO, CF and CH ligands

Übergangsmetall‐Carbin‐Komplexe, XXXIX: Synthese, Struktur und elektrochemisches Verhalten von trans‐Halogenotetracarbonyl(ferrocenylcarbin)‐Komplexen des Chroms, Molybdäns und Wolframs

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