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Bondybey, V.E.; Vaughn, C.R.; Miller, T.A.; English, J.H.; Shiley, R.H., Halogenated benzene radical cations and ground state degeneracy splitting by asymmetric substitution, J. Chem. Phys., 1981, 74, 12, 6584, https://doi.org/10.1063/1.441120 . [all data]