Abstract
Electron absorption spectra of (η5-cyclopentadienyl)(η7-cycloheptatrienyl)niobium in solution and in the vapor phase have been measured for the first time. Possible variants of the band assignment for the spectrum of the complex in a solution have been considered. In the spectrum of the vaporous compound the bands at 29570, 31730, and 34630 cm−1 correspond to the electron transitions from the 4d(σ+) orbital to the lowest Rydberg p- and d-levels. The values of Rydberg transition terms and symmetry of p-states have been determined.
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Translated fromIzvestiya Akademii Nauk. Seriya Khimicheskaya, No. 4, pp. 634–638, April, 1994.
The author is grateful to I. L. Fedyushkin for the synthesis of complex 1.
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Ketkov, S.Y. Nature of low-lying electron excited states of (η5-cyclopentadienyl) (η7-cycloheptatrienyl)niobium. Russ Chem Bull 43, 583–587 (1994). https://doi.org/10.1007/BF00699828
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DOI: https://doi.org/10.1007/BF00699828