Int. J. Mol. Sci. 2009, 10(2), 507-517; doi:10.3390/ijms10020507
Communication

Anomalously Strong Effect of the Ion Sign on the Thermochemistry of Hydrogen Bonded Aqueous Clusters of Identical Chemical Composition

Alexey B. Nadykto 1,* email, Fangqun Yu 1  and Anas Al Natsheh 2
1 Atmospheric Sciences Research Center, State University of New York at Albany, 251 Fuller Rd., Albany 12203, NY, USA 2 Kajaani University of Applied Sciences, Kuntokatu 5, 87101 Kajaani, Finland
* Author to whom correspondence should be addressed.
Received: 23 May 2008; in revised form: 5 January 2009 / Accepted: 7 January 2009 / Published: 5 February 2009
(This article belongs to the Special Issue The Chemical Bond and Bonding)
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Abstract: The sign preference of hydrogen bonded aqueous ionic clusters Χ±(H2O)i (n =1-5, Χ = F; Cl; Br) has been investigated using the Density Functional Theory and ab initio MP2 method. The present study indicates the anomalously large difference in formation free energies between cations and anions of identical chemical composition. The effect of vibrational anharmonicity on stepwise Gibbs free energy changes has been investigated, and possible uncertainties associated with the harmonic treatment of vibrational spectra have been discussed.
Keywords: Ionic clusters; DFT; ab initio; sign preference; Gibbs free energies; hydrogen bonded complexes

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MDPI and ACS Style

Nadykto, A.B.; Yu, F.; Al Natsheh, A. Anomalously Strong Effect of the Ion Sign on the Thermochemistry of Hydrogen Bonded Aqueous Clusters of Identical Chemical Composition. Int. J. Mol. Sci. 2009, 10, 507-517.

AMA Style

Nadykto AB, Yu F, Al Natsheh A. Anomalously Strong Effect of the Ion Sign on the Thermochemistry of Hydrogen Bonded Aqueous Clusters of Identical Chemical Composition. International Journal of Molecular Sciences. 2009; 10(2):507-517.

Chicago/Turabian Style

Nadykto, Alexey B.; Yu, Fangqun; Al Natsheh, Anas. 2009. "Anomalously Strong Effect of the Ion Sign on the Thermochemistry of Hydrogen Bonded Aqueous Clusters of Identical Chemical Composition." Int. J. Mol. Sci. 10, no. 2: 507-517.

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