Preparative and structural investigation of crown ether adducts of potassium fluorenides
| Autor: | Phil Liebing, Ulrich Behrens, Frank T. Edelmann, Falk Olbrich, Ahmad Zaeni |
|---|---|
| Rok vydání: | 2017 |
| Předmět: |
chemistry.chemical_classification
Agostic interaction 010405 organic chemistry Potassium Organic Chemistry Inorganic chemistry 18-Crown-6 chemistry.chemical_element Crystal structure 010402 general chemistry 01 natural sciences Biochemistry Medicinal chemistry 0104 chemical sciences Adduct Ion Inorganic Chemistry chemistry.chemical_compound chemistry Materials Chemistry Moiety Physical and Theoretical Chemistry Crown ether |
| Zdroj: | Journal of Organometallic Chemistry. 830:141-145 |
| ISSN: | 0022-328X |
| Popis: | Three crystalline adducts of potassium fluorenides with 18-crown-6, KC13H9(18-crown-6)·0.5py (1, py = pyridine), KC13H9(18-crown-6)·2THF (2), and K(9-Me3SiC13H8)(18-crown-6) (3), have been synthesized and structurally characterized through single-crystal X-ray diffraction. The complexes form orange to orange-brown, highly air- and moisture-sensitive crystals. In 1, the potassium ion is coordinated to the carbon atoms C4, C10 and C11 of the fluorenide anion in an η3-allyl-like fashion. In contrast, the solid-state structure of 2 consists of [K(18-crown-6)(THF)2]+ cations and free fluorenide anions. In the ring-substituted potassium fluorenide derivative 3, only C4 and C11 of the fluorenyl moiety are bonded to the potassium ion. Agostic methyl interactions between the SiMe3 substituents and the [K(18-crown-6)]+ cations lead to the formation of a polymeric chain structure. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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