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Ionization potentials of non-metal monosulfides. Conjugation in radical cations containing Group IV elements

  • Physical Chemistry
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Abstract

The first vertical ionization potentialsI(ns) of 69 monosulfides XSY (X, Y=H, Hal, organic, or heteroorganic substituent) are related to the inductive σI resonance (σ +R ) and polarizability (σα) constants of the substituents by dependences of theI(nS)=a+bΣσI+bΣσR+bΣσα type. TheI(ns) values are also affected by hyperconjugation which increases on going from XSH to XSY (Y≠H) compounds. The first calculations of the σ +R parameters characterizing the conjugation of Si-, Ge-, Sn-, and Pb-containing substituents with the S.+ radical cation center are reported. The reasons for weakening of resonance donor properties of heteroorganic substituents of the +M-type in the systems studied as compared to those of the same substituents in the corresponding aromatic radical cations are considered.

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Translated fromIzvestiya Akademii Nauk. Seriya Khmicheskaya, No. 1, pp. 25–31, January, 2000.

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Egorochkin, A.N., Voronkov, M.G., Skobeleva, S.E. et al. Ionization potentials of non-metal monosulfides. Conjugation in radical cations containing Group IV elements. Russ Chem Bull 49, 26–32 (2000). https://doi.org/10.1007/BF02499060

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