| Autor: |
Shenggang Li, Fuller, Jason F., Sohnlein, Bradford R., Dong-Sheng Yang |
| Předmět: |
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| Zdroj: |
Journal of Chemical Physics; 11/1/2003, Vol. 119 Issue 17, p8882, 8p, 5 Charts, 6 Graphs |
| Abstrakt: |
Gallium–dimethylamine and –trimethylamine were produced in pulsed laser vaporization molecular beams and studied by threshold photoionization and pulsed-field ionization zero electron kinetic energy (ZEKE) photoelectron spectroscopies and density functional theory calculations. Analyses of the ZEKE spectra yield molecular adiabatic ionization potentials and metal–ligand and ligand-based vibrational frequencies. Comparisons of the experimental and theoretical results establish the ground electronic states of the neutral and ionic complexes. The ionization potentials, Ga[sup +]/Ga–N stretching, and Ga[sup +]/Ga–N–C bending frequencies are 38 790, 206/177, and 132/128 cm-1 for the dimethylamine complex and 38 081 cm-1, 188/133, and 111/92 cm-1 for the trimethylamine species. The electronic ground states are [sup 1]A[sup ′]/[sup 2]A[sup ′] for Ga[sup +]/Ga–NH(CH[sub 3])[sub 2] and [sup 1]A[sub 1]/[sup 2]A[sup ″] for Ga[sup +]/Ga–N(CH[sub 3])[sub 3]. The calculated metal–ligand binding energies of Ga[sup +]/Ga–NH(CH[sub 2])[sub 2] and –N(CH[sub 3])[sub 3] are 36.2/9.7 and 37.1/8.5 kcal mol-1, respectively. © 2003 American Institute of Physics. [ABSTRACT FROM AUTHOR] |
| Databáze: |
Complementary Index |
| Externí odkaz: |
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