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Bulletin of the Korean Chemical Society (BKCS)

ISSN 0253-2964(Print)
ISSN 1229-5949(Online)
Volume 13, Number 3
BKCSDE 13(3)
March 20, 1992 

Influence of Ammonia Solvation on the Structural Stability of Ethylene Cluster Ions
Kwang Woo Jung, Sung-Seen Choi, Kyung-Hoon Jung*, Du-Jeon Hang
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 (C2H4)n(NH3)m+ under various experimental conditions suggest that (C2H4)2(NH3)3+ and (C2H4)3(NH3)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 (C2H4)2+ (C2H4)3+ clusters as the central cations provide three and two hydrogen-bonding sites, respectively, for the surrounding NH3 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.
306 - 311
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