From 1958 until 1999, coordination chemists argued about the existence or nonexistence of 1,10-phenanthroline N,N'-dioxide (phenO2). Over a dozen publications reported synthesis of its metal complexes before phenO2 was finally prepared via oxidation of 1,10-phenanthroline with HOF�CH3CN.1 We are now presenting the synthesis and characterization of the first transition metal complexes of phenO2 including the crystallographically characterized [Ni(phenO2)3]Cl2.1 S. Rozen, S. Dayan, Angew. Chem. Int. Ed. 1999, 38, 3471.

Resurrection of phenanthroline N,N'-dioxide metal complexes

243rd National Meeting (2012)

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