Chem. J. Chinese Universities ›› 2014, Vol. 35 ›› Issue (2): 344.doi: 10.7503/cjcu20130863

• Physical Chemistry • Previous Articles     Next Articles

Theoretical Investigation on the Reaction Between HRnCCH and X(X=H2O, NH3) in Gas Phase

GAO Chenggui1, LONG Zhengwen1,*(), TAN Xingfeng2, LONG Bo1,2,*(), ZHANG Weijun3, LONG Chaoyun1, QIN Shuijie1   

  1. 1. Department of Physics, Guizhou University, Guiyang 550025, China
    2.College of Information Engineering, Guizhou Minzu University, Guiyang 550025, China
    3.Laboratory of Environment Spectroscopy, Anhui Institute of Optics and Fine Mechanics,Chinese Academy of Sciences, Hefei 230031, China
  • Received:2013-09-05 Online:2014-02-10 Published:2013-12-30
  • Contact: LONG Zhengwen,LONG Bo E-mail:sci.zwlong@gzu.edu.cn;longbo@gzmu.edu.cn
  • Supported by:
    † Supported by the National Natural Science Foundation of China(No.41165007), the Science and Technology Foundation of Guizhou Province, China(Nos.20102107, 20122189), the Open Research Fund of Key Laboratory of Atmospheric Composition and Optical Radiation, Chinese Academy of Sciences(No.JJ1107) and the Graduate Innovation Foundation of Guizhou University, China(No.2013023)

Abstract:

The reaction mechanisms of HRnCCH with H2O, NH3 were explored at the CCSD(T)//MP2/aug-cc-pVTZ-pp level of theory. This investigation involved the conversion between HRnCCH and HRnOH, HRnCCH and HRnNH2, and the water, water dimer, and ammonia gas molecule addition to the C≡C bond in the HRnCCH, respectively. The calculated results show that the HCCH+HRnOH is produced by the reaction of HRnCCH+H2O with an activated barrier of 54.1 kJ/mol and HCCH+HRnNH2 is yielded via the reaction of HRnCCH+NH3 with a estimated barrier of 75.2 kJ/mol. However, the formations of HRnCHC(OH)H, HRnC(OH)CH2, HRnCHC(NH2)H and HRnC(NH2)CH2 have the respective barrier of 219.6, 220.5, 174.4 and 182.4 kJ/mol. Therefore, the reactivity of HRnCCH is of quite weakness at the environments investigated herein, which indicates that HRnCCH could be existed under these conditions. In addition, the second water molecule introduced into the HRnCCH+H2O reaction leads to the remarkable reduction for the barrier of the formation of HRnCHC(OH)H to 123.2 kJ/mol, in which the second water molecule plays a strong catalytic role in the reaction of HRnCCH with water.

Key words: HRnCCH, Quantum chemical calculation, Reaction mechanism, Water, Ammonia gas

CLC Number: 

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