Étude spectroscopique des vibrations M-C ET M-C-O DU nickel carbonyle ET DE SES dérivés

Bouquet, G.; Loutellier, A.; Bigorgne, M.

doi:10.1016/0022-2860(68)87005-x

Cited by 27 publications

(8 citation statements)

References 11 publications

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“…The lower the stretching frequency of CO, the more strong the s-donating ability of the NHC ligand. This frequency is known as Tolmans electronic parameter (TEP; Figure 3, right), [30] and was developed by Tolman building upon the pioneering work by Strohmeier et al [31] as well as Bigorgne et al [32] For the investigation of NHC ligands, these Ni complexes have been rarely used because of their high toxicity and, in some cases, their instability. Instead, the synthesis and analysis of easier-to-handle cis-[IrCl(CO) 2 (NHC)] and cis-[RhCl(CO) 2 (NHC)] complexes is preferred.…”

Section: Electronic Character Of Nhcsmentioning

confidence: 98%

The Measure of All Rings—N‐Heterocyclic Carbenes

2010

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Quantification and variation of characteristic properties of different ligand classes is an exciting and rewarding research field. N-Heterocyclic carbenes (NHCs) are of special interest since their electron richness and structure provide a unique class of ligands and organocatalysts. Consequently, they have found widespread application as ligands in transition-metal catalysis and organometallic chemistry, and as organocatalysts in their own right. Herein we provide an overview on physicochemical data (electronics, sterics, bond strength) of NHCs that are essential for the design, application, and mechanistic understanding of NHCs in catalysis.

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Section: Electronic Character Of Nhcsmentioning

confidence: 98%

The Measure of All Rings—N‐Heterocyclic Carbenes

2010

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“…Die im IR‐Spektrum ablesbare Frequenz der CO‐Streckschwingung ( ν CO ), die kleiner wird, je stärker elektronenschiebend der Ligand ist, ist ein direktes Maß für den Elektronenreichtum des Liganden L und wird auch als Tolmans elektronischer Parameter (TEP) bezeichnet (Abbildung 3, rechts) 30. Dieses von Tolman entwickelte und populär gemachte Modell baut auf Pionierarbeiten von Strohmeier und Müller31 sowie Bigorgne et al 32. auf.…”

Section: Elektronischer Charakter Von Nhcsunclassified

Das Maß aller Ringe – N‐heterocyclische Carbene

2010

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Die Quantifizierung und Variation der charakteristischen Eigenschaften von Ligandenklassen ist ein spannendes und lohnenswertes Forschungsgebiet. N‐heterocyclische Carbene (NHCs) sind dabei wegen ihres Elektronenreichtums und ihrer Struktur von besonderem Interesse. Deshalb haben NHCs weite Verbreitung als Liganden in der Übergangsmetallkatalyse und der Organometallchemie sowie auch direkt in der Organokatalyse gefunden. Hier wird ein Überblick über die physikochemischen Daten (Elektronik, Sterik, Bindung) von NHCs gegeben, die für das Design, die Anwendung und das mechanistische Verständnis dieser Verbindungen in der Katalyse nützlich sind.

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“…This frequency is known as Tolman’s electronic parameter (TEP; Figure 3, right),30 and was developed by Tolman building upon the pioneering work by Strohmeier et al 31. as well as Bigorgne et al 32…”

Section: Electronic Character Of Nhcsmentioning

confidence: 99%

The Assembly of Macrocyclic Bis‐ and Tetra‐β‐lactams with Embedded Platinum or Palladium Square‐Planar Centers

Pellico

Gallego

Ramírez‐López

et al. 2009

Chemistry A European J

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The synthesis, isolation, and full characterization of different types of stable, metal-assembled macrocyclic beta-lactams are reported. By using adequately functionalized bis-beta-lactams with defined stereochemistry as building blocks, a series of mono- and bimetallic Pd and Pt macrocycles has been prepared in good to quantitative yields. These novel structures combine the beta-lactam moiety with transition-metal fragments with cis-square-planar geometry and constitute a new class of metal-assembled cavities involving molecules with biological relevance as building blocks. By combining the adequate ligands, metallic fragments, and tuning the reaction conditions, different mono- and bimetallic macrocyclic beta-lactam cavities can be selectively obtained. Macrocycles with Pt-ethynyl groups are suitable to form host-silver triflate guest complexes in a tweezer fashion.

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Étude spectroscopique des vibrations M-C ET M-C-O DU nickel carbonyle ET DE SES dérivés

Cited by 27 publications

References 11 publications

The Measure of All Rings—N‐Heterocyclic Carbenes

The Measure of All Rings—N‐Heterocyclic Carbenes

Das Maß aller Ringe – N‐heterocyclische Carbene

The Assembly of Macrocyclic Bis‐ and Tetra‐β‐lactams with Embedded Platinum or Palladium Square‐Planar Centers

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