Synthesis, characterization and crystal structures of tetrairon ethanedithiolate complexes containing bridging bidentate phosphine ligands

• Published in: Polyhedron Vol. 33; no. 1; pp. 166 - 170
• Main Authors: Liu, Xu-Feng, Jiang, Zhong-Qing, Jia, Zhi-Jian
• Format: Journal Article
• Language: English
• Published: Elsevier Ltd 09.02.2012
• Subjects: Bidentate phosphine ligand; Carbonyl substitution; Crystal structure; Synthesis; Tetrairon ethanedithiolate; Carbonyl substitution; Tetrairon ethanedithiolate; Bidentate phosphine ligand; Synthesis; Crystal structure
• ISSN: 0277-5387
• DOI: 10.1016/j.poly.2011.11.032

Three tetrairon ethanedithiolate complexes [{(μ-EDT)Fe2(CO)5}2L] containing bridging bidentate phosphine ligands were prepared by carbonyl substitution reactions in the presence of Me3NO·2H2O. The new complexes were characterized by elemental analysis, IR and NMR spectroscopies, and single-crystal X-ray diffraction analysis. [Display omitted] ► We have prepared three tetrairon ethanedithiolate complexes containing bridging bidentate phosphine ligands. ► The new complexes were characterized by elemental analysis, together with IR and NMR spectroscopies. ► Their structures were determined by single crystal X-ray diffraction analysis. Three tetrairon ethanedithiolate complexes [{(μ-EDT)Fe2(CO)5}2L] (EDT=SCH2CH2S; L=(η5-Ph2PC5H4)2Fe, 1; Ph2PCH2CH2PPh2, 2; trans-Ph2PCH=CHPPh2, 3) containing bridging bidentate phosphine ligands were prepared by carbonyl substitution reactions in the presence of the decarbonylating agent Me3NO·2H2O. The new complexes 1–3 were characterized by elemental analysis, IR and 1H (31P, 13C) NMR spectroscopies. Furthermore, their structures were determined by single crystal X-ray diffraction analysis. The molecular structure of 1 is centrosymmetric and the two cyclopentadienyl (Cp) rings reside in a staggered conformation. The molecular structures of 2 and 3 are composed of a zigzag chain, Fe2P1C20C20AP1AFe2A, with the midpoint of the C20–C20A bond as the center of symmetry.