Synthesis and structures of diiron dithiolate complexes with 1,2-bis(diphenylphosphino)acetylene or tris(2-methoxyphenyl)phosphine

Add time:07/19/2019    Source:sciencedirect.com

Treatment of the diiron hexacarbonyl complexes (μ-SCH2CH2CH2S-μ)Fe2(CO)6 or [μ-SCH(CH3)CH(CH3)S-μ]Fe2(CO)6 with 1,2-bis(diphenylphosphino)acetylene in the presence of Me3NO·2H2O afforded tetrairon complexes with a bridging diphosphine ligand [(μ-SCH2CH2CH2S-μ)Fe2(CO)5]2(Ph2PCCPPh2) (1) and {[μ-SCH(CH3)CH(CH3)S-μ]Fe2(CO)5}2(Ph2PCCPPh2) (2). Diiron pentacarbonyl complexes with a monophosphine ligand, (μ-SCH2CH2S-μ)Fe2(CO)5[P(C6H4OCH3-2)3] (3) and [μ-SC6H3(CH3)S-μ]Fe2(CO)5[P(C6H4OCH3-2)3] (4), were prepared by the reactions of (μ-SCH2CH2S-μ)Fe2(CO)6 or [μ-SC6H3(CH3)S-μ]Fe2(CO)6 with tris(2-methoxyphenyl)phosphine in the presence of Me3NO·2H2O. The new complexes 1–4 were characterized by elemental analysis and spectroscopy, as well as by single crystal X-ray diffraction analysis.

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