Syntheses of the 47 electron clusters [(Cp*Fe)(3)(mu(3)-X)(2)] (X = S, Se) and the first Fe/Sn/Se heterocubane cluster [(Cp*Fe)(3)(SnCl3)(mu(3)-Se)(4)]center dot DME by the use of chalcogenostannate salts

Zimmermann C; Anson CE; Eckermann AL; Wunder M; Fischer G; Keilhauer I; Herrling E; Pilawa B; Hampe O; Weigend F; Dehnen S

Inorganic Chemistry, Vol.43, No.15, 4595-4603, 2004

Zimmermann C, Anson CE, Eckermann AL, Wunder M, Fischer G, Keilhauer I, Herrling E, Pilawa B, Hampe O, Weigend F, Dehnen S

By reacting 1-aminoethylammonium (H2NCH2CH2NH3+ = enH(+)) salts of [Sn2E6](4-) anions (E = S, Se), [enH](4)[Sn2S6] (1) and [enH](4)[Sn2Se6].en (2), with FeCl2/LiCp*, three novel (partly) oxidized, Cp* ligated iron chalcogenide clusters were synthesized. Two of them, [(Cp*Fe)(3)(mu(3)-S)(2)] (3) and [(Cp*Fe)(3)(mu(3)-Se)(2)] (4), contain formally 47 valence electrons. [(Cp*Fe)(3)(SnCl3)(mu(3)-Se)(4)].DME (5) represents the first known mixed metal Fe/Sn/Se heterocubane type cluster. Compounds 3-5 were structurally characterized by single-crystal X-ray diffraction, and the odd valence electron number of the [Fe3E2] clusters (E = S, Se) was confirmed by density functional (DFT) investigations, mass spectrometry, cyclic voltammetry and a susceptibility measurement of 3.