Oxido-bridged di-, tri-, and tetra-nuclear iron complexes bearing bis(trimethylsilyl)amide and thiolate ligands

摘要

A series of di-, tri-, and tetra-nuclear iron-oxido clusters with bis(trimethylsilyl)amide and thiolate ligands were synthesized from the reactions of Fe{N(SiMe _3) _2} _2 (1)with 1 equiv of thiol HSR (R = C _6H _5 (Ph), 4-tBuC _6H4, 2,6-Ph2C _6H _3 (Dpp), 2,4,6-iPr _3C _6H2 (Tip))and subsequent treatment with O _2. The trinuclear clusters [{(Me _3Si) _2N}Fe] _3(μ _3-O) {μ-S(4-RC _6H4)}3 (R = H (3a), tBu (3b))were obtained from the reactions of 1 with HSPh or HS(4-tBuC 6H4)and O 2, while we isolated a tetranuclear cluster [{(Me _3Si) _2N} _2Fe2(μ-SDpp)]2(μ _3-O) _2 (4)as crystals from an analogous reaction with HSDpp. Treatment of a tertrahydrofuran (THF)solution of 1 with HSTip and O _2 resulted in the formation of a dinuclear complex [{(Me _3Si) _2N}(TipS)(THF)Fe]2(μ-O)(5). The molecular structures of these complexes have been determined by X-ray crystallographic analysis.