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Eastern Illinois University

Masters Theses

Computational chemistry

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Validation Of The Thermochemical Cycle Used In Computing Absolute Gas Phase Acidities And A Molecular-Orbital Study Of Protonated Ammonia-Water Cluster Ions, Jeremiah Aeschleman Jan 2000

Validation Of The Thermochemical Cycle Used In Computing Absolute Gas Phase Acidities And A Molecular-Orbital Study Of Protonated Ammonia-Water Cluster Ions, Jeremiah Aeschleman

Masters Theses

This work is comprised of two separate computational projects, an evaluation of the validity of an assumption made when computing absolute gas phase acidities with a thermochemical cycle and a molecular-orbital study of protonated ammonia-water clusters ions.

Relative gas phase acidities are measured experimentally and then adjusted using Hess' law to align them with an absolute scale. In the Hess' law calculation it is assumed that the electron affinity of A• and the ionization energy of H• are independent of temperature. To test this assumption, absolute enthalpies were computed for the anion (A-) and the radical (A•) at …