Abstract
The photoanation of [Cr(NH 3) 6] 3+ by Cl − and Br − was studied in acid solution. No difference in quantum yields was found for both anions. The photoanation by Cl − was further studied in alkaline solution and in acid solution containing Co(II). In those solutions the 2E g state of Cr(III) is quenched. The limiting quantum yield for complete doublet quenching (unquenchable part of the photoreaction) is identical in acid and alkaline solution and has the same value as for the aquation (φ nq = 0.14). The quenchable part of the photoreaction depends on the Co(II) concentration the same way as the phosporescence. The probable photochemical pathways are discussed.
Published Version
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