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Gas-phase thermochemistry of the group 3 dioxides: ScO_2, YO_2 and LaO_2

Clemmer, D. E. and Dalleska, N. F. and Armentrout, P. B. (1992) Gas-phase thermochemistry of the group 3 dioxides: ScO_2, YO_2 and LaO_2. Chemical Physics Letters, 190 (3-4). pp. 259-265. ISSN 0009-2614. doi:10.1016/0009-2614(92)85336-9.

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Gas-phase ScO_2, YO_2, LaO_2 and the singly charged cations of these species are formed in endothermic reactions between MO+ (M=Sc, Y, and La) and NO_2 in a guided ion beam mass spectrometer. The cross sections of these reactions are measured as a function of kinetic energy and are interpreted to give the following 0 K bond energies (in eV): D^0(OScO)=3.95±0.33, D^0(OYO)=4.14±0.22, D^0(OLaO)=4.20±0.33, D^0(OSc^+O)=1.72±0.19, D^0(OY^+O)=1.76±0.16, and D^0(OLa^+O)=0.99±0.31. Values for the MO_2 ionization energies (in eV) are determined to be IE(ScO_2)=8.66±0.20, IE(YO_2)=8.23±0.16 and IE(LaO_2)=8.11±0.35. The differences between these values and estimates in the literature are discussed by considering the nature of the bonding in MO_2 and MO^+_2.

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Dalleska, N. F.0000-0002-2059-1587
Alternate Title:Gas-phase thermochemistry of the group 3 dioxides: ScO2, YO2 and LaO2
Additional Information:© 1992 Elsevier. Received 10 December 1991. This work is supported by the National Science Foundation Grant No. CHE-8917980. We would also like to thank Professor John Dyke for useful discussions and for providing a copy of his work before publication.
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Camille and Henry Dreyfus FoundationUNSPECIFIED
Issue or Number:3-4
Record Number:CaltechAUTHORS:20150622-144459549
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Official Citation:D.E. Clemmer, N.F. Dalleska, P.B. Armentrout, Gas-phase thermochemistry of the group 3 dioxides: ScO2, YO2 and LaO2, Chemical Physics Letters, Volume 190, Issues 3–4, 6 March 1992, Pages 259-265, ISSN 0009-2614, (
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:58426
Deposited By: George Porter
Deposited On:22 Jun 2015 22:13
Last Modified:10 Nov 2021 22:04

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