Bulletin of the Korean Chemical Society

Korean Chemical Society (대한화학회)
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Influence of Ammonia Solvation on the Structural Stability of Ethylene Cluster Ions

  • Jung Kwang Woo (Center for Molecular Science and Department of Chemistry Korea Advanced Institute of Science and Technology) ;
  • Choi Sung-Seen (Center for Molecular Science and Department of Chemistry Korea Advanced Institute of Science and Technology) ;
  • Jung Kwang Woo (Center for Molecular Science and Department of Chemistry Korea Advanced Institute of Science and Technology) ;
  • Hang Du-Jeon (Department of Chemistry, Seoul National University)
  • Published : 1992.06.20
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Abstract

The stable structures of pure ethylene and mixed ethylene-ammonia cluster ions are studied using an electron impact ionization time-of-flight mass spectrometer. Investigations on the relative cluster ion distributions of $(C_2H_4)_n(NH_3)_m^+$ under various experimental conditions suggest that $(C_2H_4)_2(NH_3)_3^+$ and $(C_2H_4)_3(NH_3)_2^+$ ions have the enhanced structural stabilities, which give insight into the feasible structure of solvated ions. For the stable configurations of these ionic species, we report an experimental evidence that both $(C_2H4)_2^+(C_2H_4)_3^+$ clusters as the central cations provide three and two hydrogen-bonding sites, respectively, for the surrounding $NH_3$ molecules. This interpretation is based on the structural stability for ethylene clusters and the intracluster ion-molecular rearrangement of the complex ion under the presence of ammonia solvent molecules.

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  1. Electron impact ionization of ethylene-methanol heteroclusters: Stable configurations and mechanisms in intracluster ion-molecule reactions vol.28, pp.9, 1992, https://doi.org/10.1002/oms.1210280902