Collect. Czech. Chem. Commun.
1969, 34, 2831-2832
https://doi.org/10.1135/cccc19692831
Electronic structure of non-alternant hydrocarbons, their analogues and derivatives. XIX. A note on the electronic spectra of the fluorenylium cation and its benzo derivatives
R. Zahradník, J. Pancíř and A. Kröhn
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