Flash vacuum thermolysis of 3,4-dimethyl-1-germacyclopent-3-enes: UV photoelectron spectroscopic characterization of GeH2and GeMe2
| Autor: | Cameron R. Harrington, Anna Chrostowska, Patrick Baylère, Virginie Lemierre, Alain Dargelos, William J. Leigh |
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| Rok vydání: | 2004 |
| Předmět: |
Spectrometer
010405 organic chemistry Photoemission spectroscopy Chemistry Thermal decomposition X-ray Analytical chemistry General Chemistry 010402 general chemistry 01 natural sciences Spectral line 0104 chemical sciences 3. Good health Inorganic Chemistry Ionization Density functional theory Ionization energy |
| Zdroj: | Applied Organometallic Chemistry. 18:676-683 |
| ISSN: | 0268-2605 |
| DOI: | 10.1002/aoc.628 |
| Popis: | Gas-phase UV photoelectron spectra of germylene (GeH 2 ) and its dimethyl analogue (GeMe 2 ) have been recorded, using flash vacuum thermolysis of 3,4-dimethyl- and 1,1,3,4-tetramethyl-germacyclopent-3-ene to generate these reactive species in the inlet of the photoelectron spectrometer. The lowest vertical ionization bands for GeH 2 (9.4 eV) and GeMe 2 (8.2 and 10.0 eV) have been located with the aid of time-dependent density functional theory calculations carried out at the B3LYP/6-311G(d,p) level of theory. Similar experiments carried out with 3,4-dimethyl-1,1-diphenylgermacyclopent-3-ene, in an attempt to record the photoelectron spectrum of diphenylgermylene (GePh 2 ), were less conclusive, but are consistent with the theoretically predicted lowest Ionization potential of 8.0-8.2 eV for GePh 2 . Photoelectron spectra of the three germacyclopentene derivatives are also reported. |
| Databáze: | OpenAIRE |
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