Stoichiometric and Catalytic Secondary O-Atom Transfer by Fe(III)−NO<sub>2</sub> Complexes Derived from a Planar Tetradentate Non-heme Ligand: Reminiscence of Heme Chemistry
作者:Raman K. Afshar、Aura A. Eroy-Reveles、Marilyn M. Olmstead、Pradip K. Mascharak
DOI:10.1021/ic0614115
日期:2006.12.1
An Fe(III) nitro complex [(bpb)Fe(NO2)(py)] (2) of the tetradentate ligand 1,2-bis(pyridine-2-carboxamido)benzene (H2bpb, H is the dissociable amide proton) has been synthesized via addition of NaNO2 to [(bpb)Fe(py)2](ClO4) (1) in MeCN or DMF. This structurally characterized Fe(III) nitro complex exhibits its nuNO2 at 1384 cm(-1). The reaction of 1 with 2 equiv of Et4NX (X = Cl-, Br-) affords the high-spin
Reactions of Nitric Oxide with a Low-Spin Fe(III) Center Ligated to a Tetradentate Dicarboxamide N<sub>4</sub> Ligand: Parallels between Heme and Non-heme Systems
作者:Apurba K. Patra、Michael J. Rose、Marilyn M. Olmstead、Pradip K. Mascharak
DOI:10.1021/ja040015n
日期:2004.4.1
Reaction of excess NO with the non-heme Fe(III) complex [(bpb)Fe(py)2]ClO4 in MeCN under strictly anaerobic conditions affords the Fe-NO}6(nitro)(nitrosyl) complex [(bpb)Fe(NO)(NO2)] (1) via metal-promoted NO disproportionation, while in a MeOH/MeCN mixture, the same reaction leads to reductive nitrosylation and generation of the Fe-NO}7 species [(bpb)Fe(NO)] (2). Exposure of a solution of 1 in DMF to dioxygen leads to formation of the ring-nitrosylated product [(bpb-NO2)Fe(NO3)(DMF)] (3). The present system therefore exhibits all the NO reactivities reported so far with the iron-porphyrins.
Ray, Manabendra; Mukherjee, Rabindranath; Richardson, John F., Journal of the Chemical Society, Dalton Transactions
作者:Ray, Manabendra、Mukherjee, Rabindranath、Richardson, John F.、Buchanan, Robert M.