2-Pyridylmetallocenes, Part V. Synthesis of Hydroxymethyl-, Formyl-, and Carboxy-pyridylferrocene and Study of Their Cycloplatination Reactions. [Molecular Structures of [{C5H3R(2-C5H4N)-1, 2}FeCp] ­(R = CHO, COOH) and σ-Pt[(C5H5)Fe{C5H2(2-C5H4N)­(CH2OH)}

2-Pyridylmetallocenes, Part IX. Sulphur-Substituted 2-Pyridylferrocene: Synthesis and Reactivity towards Pt(II) and Hg(II)

Thio-substituted 2-pyridylferrocenes [CpFe{C5H3(X)(C5H4N)}] (X = SOTol, 3; SMe, 5) were prepared from [CpFe(C5H4R)] (R = SOTol, 1; 2-C5H4N, 2) in moderate yields. The reactions of 3 and 5 with [PtCl2(DMSO)2] yielded the binuclear N, S chelated complexes [CpFe{C5H3(X)(C5H4N)}-(к-N,S)-PtCl2] (X= SOTol, 4, SMe, 6), while the reaction of 5 with Hg(OAc)2/LiCl led to cyclomercuration with generation of [CpFe{C5H2(SMe)(C5H4N)(HgCl)}], 7. The crystal structures of 6·CH2Cl2 and 7 were determined. The structure of 6 showed a weak intramolecular Fe…Pt interaction and several weak intermolecular interactions involving all Cl atoms. Weak intermolecular interactions between Hg and S atoms in the cyclomercurated 7 led to a tetrameric structure involving a Hg2S2 ring.

Synthesis and characterization of 1,2,3,4,5-pentafluoroferrocene

Starting from ferrocene, pentafluoroferrocene [Fe(C5F5)(C5H5)] can be prepared in five steps via a one-pot lithiation-electrophilic fluorination strategy. Pentafluoroferrocene was characterized by multinuclear NMR and IR spectroscopy, by cyclovoltammetry as well as X-ray (solid) and electron diffraction (gas) and the experimental results compared with DFT calculations.