The Bonding in Some Bis(Arene)Chromium Compounds as Indicated by UV Photoelectron Spectroscopy.
TEXAS UNIV AT AUSTIN DEPT OF CHEMISTRY
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HeI ultraviolet photoelectron UV-PES spectra are reported for several bisarenechromium compounds. The arenes concerned are m-trifluoro-methylbenzotrifluoride, p-fluorobenzetrifluoride, p-difluorobenzene, m-dichlorobenzene, fluorobenzene, chlorobenzene, methylbenzoate, p-chlorotoluene, diphenyl ether, toluene, o-xylene, trimethylsilylbenzene, isobutylbenzene, 1,2,3-trimethylbenzene, 1,3,5-trimethylbenzene, and 1,2,4,5-tetremethylbenzene. The spectra have been interpreted using a qualitative perturbation molecular orbital model. The two major findings of the work are 1 the ionizations from the metal-localized a sub 1g and e sub 2g molecular orbitals are governed primarily by ligand electronegativity, but there is some evidence for the operation of conjugative effects, and 2 the ionization energies of the free and coordinated arenes are quite similar. Author
- Organic Chemistry
- Atomic and Molecular Physics and Spectroscopy