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Chromium oxyanions, CrxOyH z− , were generated in the gas-phase using a quadrupole ion trap secondary ion mass spectrometer (IT-SIMS), where they were reacted with O2. Only CrO 2− of the Cr1OyH z− envelope was observed to react with oxygen, producing primarily CrO 3− . The rate constant for the reaction of CrO 2− with O2 was ∼38% of the Langevin collision constant at 310 K. CrO 3− , CrO 4...
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