Theoretical Chemistry Accounts

, 124:409 | Cite as

Theoretical study on the ion–molecule reaction of HCN+ with NH3

  • Yan Li
  • Hui-ling Liu
  • Yan-bo Sun
  • Zhuo Li
  • Xu-ri HuangEmail author
  • Chia-chung Sun
Regular Article


A detailed theoretical study is carried out at the B3LYP/6-311G(d,p) and CCSD(T)/6-311++G(3df,2pd) (single-point) levels as an attempt to investigate the mechanism of the little understand ion–molecule reaction between HCN+ and NH3. Various possible reaction pathways are considered. It is shown that six dissociation products P 1 (NH3 + + HCN), P 2 (NH4 + + CN), P 3 (NH3 + + HNC), P 9 (HCNH+ + NH2) P 10 (NCNH3 + + H), and P 12 (HNCNH2 + + H) are both thermodynamically and kinetically feasible. Among these products, P 1 is the most competitive product with predominant abundance. P 3 and P 9 may be the second feasible products with comparable yields. P 12 may be the least possible product followed by the almost negligible P 2 and P 10 . Because the isomers and transition states involved in the HCN+ + NH3 reaction all lie below the reactant, the title reaction is expected to be rapid, which is consistent with the measured large rate constant in experiment. The title reaction may have a potential relevance in Titan’s atmosphere, where the temperature is very low. Furthermore, our calculated results are compared with the previous experimental findings.


Reaction mechanism Potential energy surface (PES) HCN+ NH3 



This work is supported by the National Natural Science Foundation of China (Nos. 20773048).

Supplementary material

214_2009_631_MOESM1_ESM.doc (179 kb)
Supplementary material 1 (DOC 179 kb)


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Copyright information

© Springer-Verlag 2009

Authors and Affiliations

  • Yan Li
    • 1
  • Hui-ling Liu
    • 1
  • Yan-bo Sun
    • 1
  • Zhuo Li
    • 1
  • Xu-ri Huang
    • 1
    Email author
  • Chia-chung Sun
    • 1
  1. 1.State Key Laboratory of Theoretical and Computational Chemistry, Institute of Theoretical ChemistryJilin UniversityChangchunPeople’s Republic of China

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