M.S. (Master of Science)
Department of Chemistry and Biochemistry
Mass spectrometry; Afterglow (Physics); Thermochemistry; Formic acid; Halides; Tetrachlorides; Anions
This thesis describes the investigation of the thermochemical properties of formic acid-halide clusters and group 15 tetrachloride anions by using a flowing afterglow apparatus. Energy resolved collision induced dissociation experiments are performed to obtain the thermochemical data. The resulting 0 K bond dissociation energies (in kJ mol^-1) are D(HCOOH-X') = 114 ? 9, 70 ? 7, and 52 ? 9 for X = Cl, Br, and I respectively. The second bond dissociation energies are D[(HCOOH)X -HCOOH] = 50 ? 9, 43 ? 7, and 45 ? 9, respectively. For the group 15 tetrachloride anions, the 0 K bond dissociation energies are D(ACl[sub 3]-Cl') = 80 ? 7, 107 ? 7, 134 ?10, and 130 ? 10 for A = P, As, Sb, and Bi, respectively. The periodic trends of these systems are analyzed and discussed. A history of flowing afterglow mass spectrometry and a comparison to other thermochemical instrumentation are given as well.
Walker, Barry, "Flowing afterglow energy resolved mass spectrometry : thermochemical investigations of formic acid-halide clusters and group 15 tetrachloride anions" (1999). Graduate Research Theses & Dissertations. 3156.
x, 83 pages
Northern Illinois University
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