NOVEL DIAMAGNETIC AND PARAMAGNETIC IRON(II), IRON(III), AND IRON(IV) CLASSICAL AND NONCLASSICAL HYDRIDES - X-RAY CRYSTAL-STRUCTURE OF [FE(C5ME5)(DPPE)D]PF6

The synthesis, characterization, and X-ray crystal structure determination of the unprecedented 17-electron radical cation iron(III) hydride [Fe(Cp*)(dppe)-H]PF6 (2) is reported. The related protonation of the parent iron(II) hydride Fe(Cp*)(dppe)H, including both the synthesis and characterization of the first half-sandwich iron dihydrogen complex, [Fe(Cp*)(dppe)(eta(2)-H-2)]BF4, and the first organoiron(IV) dihydride, [Fe(Cp*)(dppe)(H)2]-[BF4], are presented.