A new member of tetranuclear dinitrosyl iron complexes (DNICs) with 2-mercaptothiazoline ligand: synthesis, structure and properties

作者：Chen, Chien-Hong^*; Wang, Jheng-Hong; Huang, Jing-Yi; Hsieh, Chung-Hung

来源：Research on Chemical Intermediates, 2014, 40(6): 2217-2227.

DOI：10.1007/s11164-014-1599-4

• Dinitrosyl iron complex
• DNIC
• Tetranuclear
• Nitrosyl
• Nitric oxide
• 2-Mercaptothiazoline

A new tetranuclear dinitrosyliron complex [(mu-SC3H4SN)Fe(NO)(2)](4) (2), each of a Fe center coordinated with two S or two N, was prepared by CO replacement from the reduced precursor (CO)(2)Fe(NO)(2) with 1 equiv of HSC3H4SN (2-mercaptothiazoline) in the presence of O-2(g). The structure of 2 is similar to [(Imid-iPr)Fe(NO)(2)](4) (Imid-iPr = 2-isopropylimidazole) (Hess et al. J Am Chem Soc 133:20426-20434, 2011), and both complexes comprise a quadrilateral plane of irons with corresponding ligands, SC3H4SN- or Imid-iPr(-), bridging the edges and two nitrosyl ligands capping the irons at the corners. An additional equiv of SC3H4SN- was added to 2, which results in the mononuclear {Fe(NO)(2)}(9) (SC3H4SN)(2)Fe(NO) (2) (-) (3), in the manner of N bound-[SC3H4SN]. Reaction of (TMEDA)IFe(NO)(2) (TMEDA = tetramethylethylenediamine) and complex 3 leads to the formation of complex 2. Dinuclear complex [(mu-C5H7N2)Fe(NO)(2)](2) (4) can be synthesized by the ligand displacement of SC3H4SN- to C5H7N2 (-) (3,5-dimethylpyrazolate) of 2 (Chong et al. Can J Chem 57:3119-3125, 1979). Complexes 2-4 were characterized by IR and UV-Vis. The molecular structures of 2 and 3 were determined by X-ray single crystal diffraction.

• 出版日期2014-7