NO_2~- Activation and Reduction to NO by a Nonheme Fe(NO_2)_2 Complex

摘要

The selective reduction of nitrite (NO_2~-) to nitric oxide (NO) is a fundamentally important chemical transformation related to environmental remediation of NO_x and mammalian blood flow. We report the synthesis and characterization of two nonheme Fe complexes, [Fe(LN_4~(Im))(MeCN)~2](BF~4)~2 (1~(MeCN)) and [Fe(LN_4~(Im))(NO_2)_2] (2), geared toward understanding the NO_2~- to NO conversion. Complex 2 represents the first structurally characterized Fe~(Ⅱ) complex with two axial NO_2~- ligands that functions as a nitrite reduction catalyst.