Elucidating the mechanism of the photochemical Pauson–Khand reaction: matrix photochemistry of phenylacetylenehexacarbonyldicobalt
| Autor: | Jerzy Gebicki, Ian R. Dunkin, James S. Scott, Charles M. Gordon, Mariusz Kiszka, William J. Kerr |
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| Rok vydání: | 1998 |
| Předmět: |
chemistry.chemical_classification
Argon Chemistry Pauson–Khand reaction Organic Chemistry Matrix isolation chemistry.chemical_element Alkyne Photochemistry Biochemistry Nitrogen Inorganic Chemistry chemistry.chemical_compound Phenylacetylene Materials Chemistry Thermochemistry Irradiation Physical and Theoretical Chemistry |
| Zdroj: | Journal of Organometallic Chemistry. 554:147-154 |
| ISSN: | 0022-328X |
| DOI: | 10.1016/s0022-328x(97)00660-8 |
| Popis: | Short wavelength UV irradiation of (phenylacetylene)Co 2 (CO) 6 ( 3 ) in argon matrices at 12 K results in loss of CO to form (phenylacetylene)Co 2 (CO) 5 ( 4 ). Reversal of this reaction occurs on longer wavelength irradiation. When the reaction is instead carried out in mixed argon/nitrogen matrices (phenylacetylene)Co 2 (CO) 5 (N 2 ) ( 5 ) is formed as an additional product. Irradiation at λ =390 nm allows selective reversal of photoproduct 4 to the parent species, leaving photoproduct 5 unaffected. When 3 is irradiated in pure nitrogen matrices photoproduct 4 is not formed, but two photoproducts containing coordinated dinitrogen are observed. One of these may confidently be assigned as 5 , but the identity of the second cannot at present be specified with certainty. The results gained are discussed in the light of the much more widely studied and better understood thermal chemistry of such complexes. |
| Databáze: | OpenAIRE |
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