Laser-ablated molybdenum and tungsten atoms were reacted with dioxygen and 18 O-substituted dioxygen. The products of these reactions were isolated in solid argon matrices at 10 K and studied by matrix infrared spectroscopy. Analysis of spectra enabled identification of reaction products, which included MoO 2, (O 2 )MoO 2, MoO 3, WO, WO 2, (O 2 )WO 2, and WO 3 . Resolution of isotopic splitting due to natural isotopic abundance of the metal verified the presence of a single metal atom in these molecules and allowed for calculation of bond angles for the molybdenum and tungsten dioxide molecules and their dioxygen complexes.
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Bare et al. (1998) studied this question.
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