A Further Study of the Products of Scandium and Dioxygen Reactions

Abstract

The products of the reaction of Sc and dioxygen have been reinvestigated. By adding the electron-trapping molecule CCl4, additional information about the IR spectra has been obtained, as well as the observation of new bands. New ab initio calculations are also performed on possible products of the Sc plus O2 reaction. The previously observed band at 722.5 cm-1 is assigned as the b2 mode of ScO2 -. Bands arising from ScO+, Sc(O2)+, and(O2)ScO are also assigned. We are still unable to assign any bands to OScO. The problems associated with the computational study of ScO2 are discussed.

Metal Cluster Models for Heterogeneous Catalysis: A Matrix‐Isolation Perspective

“…The dioxides MO 2 have been generated for all transition metals except for M=Sc, Pd, Ag, and Hg. Claims for ScO 2 later proved to be ScO 2 − . For example, by deposition of Ni atoms with O 2 in Ar matrices mainly the Ni(O 2 ) superoxide is formed, which is transformed into the NiO 2 dioxide by photoexcitation with red light.…”

A Critical Appraisal of the Experimental Data on the Molecular Structure and Spectra of Halides, Oxides, and Hydrides of the s-, d-, and f-Block Elements

“…The value of 1288 used in Table 1 of this Review for ScO 2 is now thought [131] to be due to ScO 2 À (isoelectronic with CaF 2 ). IrO 2 [132] , RhO 2 , [133] and PtO 2 [134] are all reported as linear, while the more weakly bound YO 2 and LaO 2 are nonlinear [135] with n 1 showing an anomalously high intensity and frequency relative to n 3 .…”

Eine kritische Bewertung der experimentellen Daten über Molekülstruktur und Spektren der Halogenide, Oxide und Hydride der s-, d- und f-Block-Elemente

“…[131] IrO 2 , [132] RhO 2 [133] und PtO 2 [134] schwächer gebundenen Moleküle YO 2 und LaO 2 nicht linear sind, [135] wobei n 1 im Vergleich zu n 3 eine anomal hohe Intensität und Frequenz aufweist. Mittlerweile gibt es auch Daten für die Dioxide aller Lanthanoide mit Ausnahme von Pm, Er und Lu.…”