Rydberg transitions of aniline and N,N-diethylaniline |
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Authors: | Kiyokazu Fuke Saburo Nagakura |
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Institution: | The Institute for Solid State Physics, The University of Tokyo, Roppongi, Minato, Tokyo 106, Japan |
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Abstract: | The absorption spectra of aniline and N,N-diethylaniline in the gaseous and condensed phases were measured in the 30 000–60 000 cm?1 region. The magnetic circular dichroism (MCD) spectra of these compounds in the gas phase and in solution were also measured in the region 30 000–49 000 cm?1. The MCD signals due to the Rydberg transitions were newly observed for N,N-diethylaniline. On the basis of these data, we demonstrated that in the region below 50 000 cm?1 the Rydberg transition bands appear at 47 180 cm?1 for aniline and at 36 520, 38 880, and 42 000 cm?1 for N,N-diethylaniline. Besides these, in the region higher than 50 000 cm?1, a number of Rydberg transition bands were observed for both compounds in the gaseous state. The observed Rydberg transition bands were analyzed with the aid of the Rydberg formula: they were assigned for aniline to the np- and nd-type series converging to the first and second ionization potentials, and for N,N-diethylaniline to the us- and two np-type series converging to the first ionization potential. |
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