$HS-H$ BOND DISSOCIATION ENERGY DETERMINATION BY THRESHOLD ION-PAIR PRODUCTION SPECTROSCOPY (TIPPS)
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Date
2000
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Publisher
Ohio State University
Abstract
The first single photon threshlod ion-pair production spectrum (TIPPS) of a polyatomic molecule, $H_{2}S$, was monitoring $H^{+}$ ion generated from the dissociation process $H_{2}S\rightarrow HS^{-}+ H^{+}$. Its ion-pair threshold was determined to be $IPP = 122458 \pm 3 cm^{-1}$. As a result, the bond dissociation energy $(D(HS-H)=31451 \pm 4 cm^{-1})$ could be calculated from $D(HS-H) = IPP-IP(H) + EA(HS)$, by knowing the ionization potential of the hydrogen atom $(IP(H)= 109678.772 cm^{-1})$ and the electron affinity of the HS radical $(EA(HS) = 18672 \pm 2 cm^{-1})$.
Description
Author Institution: Department of Chemistry, University of Waterloo