| Autor: |
Gerard R. Dobson, Paul H. Wermer |
| Rok vydání: |
1988 |
| Předmět: |
|
| Zdroj: |
Inorganica Chimica Acta. 142:91-94 |
| ISSN: |
0020-1693 |
| DOI: |
10.1016/s0020-1693(00)80664-7 |
| Popis: |
Pulsed laser flash photolysis with IR detection apparatus in which the analyzing source is an IR diode laser has been used to study ligand-exchange reactions of metal carbonyl transients in solution. The apparatus is described and the advantages of the IR diode laser analyzing source over the ‘globar’ and line-tuneable CO laser sources previously employed in such studies are discussed. It has been employed to monitor the thermal reaction with pip of trans -[(n-C 7 H 16 )(L)W(CO) 4 ], (L = tri(isopropyl) phosphite) produced via pulsed laser flash photolysis of cis -(pip)(L)W(CO) 4 in n-heptane. This reaction obeys a mixed order rate law interpreted in terms of bimolecular ‘trapping’ of the photogenerated intermediate with pip to afford trans -(pip)(L)W(CO) 4 and a competing unimolecular pathway tentatively ascribed to slow isomerization of trans -[(L)W(CO) 4 ] to its cis analogue. This isomer then is rapidly trapped by pip to afford the cis -(pip)(L)W(CO) 4 photolysis precursor. |
| Databáze: |
OpenAIRE |
| Externí odkaz: |
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