Structural Chemistry

, Volume 19, Issue 2, pp 339–352 | Cite as

Substitution effects on neutral and protonated pyridine derivatives along the periodic table

  • Fernando Blanco
  • Daniel H. O’ Donovan
  • Ibon AlkortaEmail author
  • José Elguero
Original Research


A theoretical study of the monosubstitution effects of all atoms of the second and third rows of the periodic table on the α, β and γ positions of neutral and protonated pyridine has been carried out by means of B3LYP/6-31 + G(d,p) DFT calculations. The geometric and electronic properties, calculated using the Atoms in Molecules methodology, and the electrostatic potential have been analysed. Concurrently, three separate aromaticity indexes (NICS(0), NICS(1) and HOMA) have been evaluated and compared to the above results. Furthermore, the effect of protonation on these parameters has been investigated. A comparison with analogous results for benzene derivatives has also been carried out.


Pyridine Protonation Substituent effects Electrostatic potential Atom in molecules 



This work was carried out with financial support from the Ministerio de Ciencia y Tecnología (Project No. CTQ2006-14487-C02-01/BQU) and Comunidad Autónoma de Madrid (Project MADRISOLAR, ref. S-0505/PPQ/0225). Thanks are given to the CTI (CSIC) for allocation of computer time. Acknowledgment is also due to Dr. Isabel Rozas (Trinity College Dublin) for her support in our investigations.


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Copyright information

© Springer Science+Business Media, LLC 2008

Authors and Affiliations

  • Fernando Blanco
    • 1
  • Daniel H. O’ Donovan
    • 2
  • Ibon Alkorta
    • 1
    Email author
  • José Elguero
    • 1
  1. 1.Instituto de Química Médica (CSIC)MadridSpain
  2. 2.School of Chemistry, Trinity CollegeUniversity of DublinDublin 2Ireland

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