Electron-spin multiplicities and molecular structures of neutral and ionic scandium-benzene complexes.
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| Abstract | :  Scandium-benzene complexes, Sc-(C6H6)1,2 are produced by interactions between the laser-vaporized scandium atoms and benzene vapor in pulsed molecular beams, and identified by photoionization time-of-flight mass spectrometry and photoionization efficiency spectroscopy. The electron-spin multiplicities and geometries of these complexes and their ions are determined by combining pulsed field-ionization zero electron kinetic-energy spectroscopy and density-functional theory calculations. For scandium-monobenzene, a short-range quartet ground state is determined for the neutral complex, and a low-energy triplet state is probed for the ion. For the dibenzene complex, the neutral ground state is a doublet, and two low-energy ion states are singlet and triplet. The quartet and triplet states of scandium-monobenzene and the triplet state of scandium-dibenzene possess sixfold symmetry, whereas the doublet and singlet of the dibenzene complex have twofold symmetry. Moreover, ionization energies and metal-ring stretching wavenumbers are measured for both complexes. | 
| Year of Publication | :  2005 | 
| Journal | :  The Journal of chemical physics | 
| Volume | :  123 | 
| Issue | :  21 | 
| Number of Pages | :  214306 | 
| Date Published | :  2005 | 
| ISSN Number | :  0021-9606 | 
| URL | :  https://doi.org/10.1063/1.2131867 | 
| DOI | :  10.1063/1.2131867 | 
| Short Title | :  J Chem Phys | 
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