Intermolecular stabilization in new 2-iminopyridine derivatives complexes of Pd(II) and their reactivity towards alkenes
| Autor: | David Moreno da Costa, Leonardo S. Santos, Manuel A. Escobar, Alan R. Cabrera, Oleksandra S. Trofymchuk, Francisco Gracia, Rene S. Rojas, Constantin G. Daniliuc, Fabiane M. Nachtigall |
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| Rok vydání: | 2018 |
| Předmět: |
chemistry.chemical_classification
Ethylene Nitrile 010405 organic chemistry Single component Organic Chemistry Intermolecular force Cationic polymerization 010402 general chemistry 01 natural sciences Biochemistry 0104 chemical sciences Inorganic Chemistry chemistry.chemical_compound chemistry Polymerization Polymer chemistry Materials Chemistry Reactivity (chemistry) Physical and Theoretical Chemistry Counterion |
| Zdroj: | Journal of Organometallic Chemistry. 863:21-29 |
| ISSN: | 0022-328X |
| Popis: | Two new iminopyriridine ligands (1–2) and two new neutral Pd(II) complexes (4–5) were designed, synthesized and characterized by spectroscopic and spectrometric techniques. Molecular structures of compounds 1, 3 and 5 were obtained by X-Ray Diffraction. Addition of AgPF6 to compounds 4–5 produced two new cationic Pd(II) complexes stabilized by an exocyclic nitrile intermolecular interaction (6–7). The spectrometric characterization of these compounds confirms a dimeric nature of the complexes and an enhanced air/thermal/light resistance. The reactivity towards ethylene oligomerization/polymerization of all complexes (4–7) at 1 bar was evaluated, either as single component or with 1 equivalent of B(C6F5)3. The change of the counterion from PF6− to OTf− allowed to obtain the compound 8, where an improvement of the reactivity was observed. ESI-MS experiments of 8 showed the insertion of up to 16 units of ethylene in the chain. |
| Databáze: | OpenAIRE |
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