We disclose the synthesis, characterization, and reactivity profiles of a dinitrosyl iron complex (DNIC) toward exogenous Brønsted and Lewis acids. Treatment of the Fe (NO) 210 complex (butylNN) Fe (NO) 2 (1) (butylNN = 2- (1-butyl-5 (tert-butyl) -1H-pyrazol-3-yl) -6-methylpyridine) with a variety of Brønsted and Lewis acids generates an oxidized Fe (NO) 29 species (butylNN) Fe (NO) 2PF6 (2-PF6) and, in the presence of a radical reagent, N2O. The pathway for N2O formation is governed by acid additives, and mechanistic studies indicate that the acid promotes electron transfer from the iron center in 1 and facilitates NO lability, providing a pathway for N2O formation.
Zars et al. (Tue,) studied this question.
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