Surface-Guided Formation of an Organocobalt Complex
| Autor: | Mario Ruben, Pablo Casado Aguilar, Peter S. Deimel, Florian Klappenberger, Svetlana Klyatskaya, Raphael Hellwig, Tobias Paintner, Francesco Allegretti, Joachim Reichert, Peter B. Weber, M. Lattelais, Johannes V. Barth, Marie-Laure Bocquet, Yuanyuan Guo, Mateusz Paszkiewicz, Yi-Qi Zhang, Anthoula C. Papageorgiou |
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| Rok vydání: | 2016 |
| Předmět: |
chemistry.chemical_classification
Chemistry Alkyne General Chemistry 02 engineering and technology General Medicine Photochemistry 010402 general chemistry 021001 nanoscience & nanotechnology 01 natural sciences Catalysis law.invention 0104 chemical sciences chemistry.chemical_compound X-ray photoelectron spectroscopy law Moiety Molecule Organic synthesis Density functional theory Scanning tunneling microscope 0210 nano-technology |
| Zdroj: | Angewandte Chemie. 128:5848-5853 |
| ISSN: | 0044-8249 |
| Popis: | Organocobalt complexes represent a versatile tool in organic synthesis as they are important intermediates in Pauson–Khand, Friedel–Crafts, and Nicholas reactions. Herein, a single-molecule-level investigation addressing the formation of an organocobalt complex at a solid–vacuum interface is reported. Deposition of 4,4′-(ethyne-1,2-diyl)dibenzonitrile and Co atoms on the Ag(111) surface followed by annealing resulted in genuine complexes in which single Co atoms laterally coordinated to two carbonitrile groups undergo organometallic bonding with the internal alkyne moiety of adjacent molecules. Alternative complexation scenarios involving fragmentation of the precursor were ruled out by complementary X-ray photoelectron spectroscopy. According to density functional theory analysis, the complexation with the alkyne moiety follows the Dewar–Chatt–Duncanson model for a two-electron-donor ligand where an alkyne-to-Co donation occurs together with a strong metal-to-alkyne back-donation. |
| Databáze: | OpenAIRE |
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