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Two-coordinate iron(I) complex [Fe{N(SiMe3)2}2](-) : synthesis, properties, and redox activity
C Gunnar Werncke1, Philip C Bunting, Carine Duhayon
1CNRS, LCC (Laboratoire de Chimie de Coordination), 205 route de Narbonne, 31077 Toulouse (France) http://www.lcc-toulouse.fr/lcc/spip.php?article433; Université de Toulouse, UPS, INPT, 31077 Toulouse (France).
Abstract:
First-row two-coordinate complexes are attracting much interest. Herein, we report the high-yield isolation of the linear two-coordinate iron(I) complex salt [K(L)][Fe{N(SiMe3 )2 }2 ] (L=18-crown-6 or crypt-222) through the reduction of either [Fe{N(SiMe3 )2 }2 ] or its three-coordinate phosphine adduct [Fe{N(SiMe3 )2 }2 (PCy3 )]. Detailed characterization is gained through X-ray diffraction, variable-temperature NMR spectroscopy, and magnetic susceptibility studies. One- and two-electron oxidation through reaction with I2 is further found to afford the corresponding iodo iron(II) and diiodo iron(III) complexes.
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