Electron paramagnetic resonance spectra and structures of copper-ethylene complexes (Cu[C2H4], Cu[C2H4]2 and Cu[C2H4]3) in hydrocarbon matrixes
| Autor: | James A. Howard, H. A. Joly, Brynmor Mile |
|---|---|
| Rok vydání: | 1990 |
| Předmět: |
chemistry.chemical_classification
Ethylene Cyclohexane Chemistry Stereochemistry General Engineering Matrix isolation chemistry.chemical_element Copper Spectral line law.invention chemistry.chemical_compound Crystallography Hydrocarbon law Molecule Physical and Theoretical Chemistry Electron paramagnetic resonance |
| Zdroj: | The Journal of Physical Chemistry. 94:1275-1279 |
| ISSN: | 1541-5740 0022-3654 |
| DOI: | 10.1021/j100367a014 |
| Popis: | Two mononuclear {pi}-complexes, Cu(C{sub 2}H{sub 4}) and Cu(C{sub 2}H{sub 4}){sub 2}, have been positively identified by EPR spectroscopy from reaction of Cu atoms and ethylene at 77 K in inert hydrocarbon matrices on a rotating cryostat. The spectra of these copper(O) complexes are consistent with dative bonding for both species and with a C{sub 2v} structure for Cu(C{sub 2}H{sub 4}) and a D{sub 2h} structure for Cu(C{sub 2}H{sub 4}){sub 2}. Spectra of Cu({sup 13}CH{sub 2}CH{sub 2}) and Cu({sup 13}CH{sub 2}CH{sub 2}){sub 2} are consistent with these assignments. A third complex is formed in both adamantane and cyclohexane that could be Cu(C{sub 2}H{sub 4}){sub 2} with a structure other than D{sub 2h} but is more likely to be the mononuclear trisligand complex Cu(C{sub 2}H{sub 4}){sub 3} with a D{sub 3h} structure. In the absence of a well-resolved isotropic spectrum of Cu({sup 13}CH{sub 2}CH{sub 2}){sub 3}, this assignment must however be taken as tentative. |
| Databáze: | OpenAIRE |
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