Reversible Complexation of Alkynes by a Germylene
| Autor: | Chia-Yuan Chen, Philip P. Power, Ting Yi Lai, Kelly L. Gullett, James C. Fettinger |
|---|---|
| Rok vydání: | 2019 |
| Předmět: |
chemistry.chemical_classification
1h nmr spectroscopy 010405 organic chemistry Chemistry Organic Chemistry Alkyne 010402 general chemistry 01 natural sciences Toluene Trimethylsilylacetylene 0104 chemical sciences Gibbs free energy Inorganic Chemistry chemistry.chemical_compound symbols.namesake 13c nmr spectroscopy Phenylacetylene Polymer chemistry symbols Physical and Theoretical Chemistry Diphenylacetylene |
| Zdroj: | Organometallics. 38:1421-1424 |
| ISSN: | 1520-6041 0276-7333 |
| Popis: | The diarylgermylene Ge(ArMe6)2 (ArMe6 = C6H3-2,6-(C6H2-2,4,6-Me3)2) is shown to react reversibly with the four unstrained alkynes 3-hexyne, diphenylacetylene, trimethylsilylacetylene, and phenylacetylene at ambient temperature in toluene. The germirene products (ArMe6)2GeC(R)═C(R′) (R, R′ = Et, Et (1a), Ph, Ph (1b), H, SiMe3 (1c), H, Ph (1d) were characterized by 1H and 13C NMR spectroscopy and by X-ray crystallography in the case of 1a and 1d. The thermodynamic parameters of the reactions were determined by variable-temperature 1H NMR spectroscopy, and the experimental Gibbs free energies indicated their near-thermoneutrality and relatively weak alkyne coordination. |
| Databáze: | OpenAIRE |
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