Bis-cyclopentadienyl Iron: a Molecular Sandwich

  title={Bis-cyclopentadienyl Iron: a Molecular Sandwich},
  author={Jack D Dunitz and Leslie E. Orgel},
Kealy and Pauson1 have described the preparation of bis-cyclopentadienyl iron, (C5H5)2Fe, which they formulated as (I). More recently, Wilkinson, Rosenblum, Whiting and Woodward2 have observed that the compound is diamagnetic, that it has zero dipole moment, and that only one C—H stretching frequency occurs (at 3.25 µ) in the infra-red absorption spectrum; on the basis of these observations they have proposed the very unorthodox structures (II) or (III). In the present communication we wish to… 

Sandwich‐artige Cyclopentadienylkomplexe von Hauptgruppenelementen

Cyclopentadienyl (Cp) complexes of maingroup elements are classified and compared in terms of structural types, bonding features, and characteristic reactions. Halfsandwich, sandwich and multidecker

X-ray diffraction studies of mesomorphic ferrocene diesters

Abstract The crystal and molecular structure of 1,l ′-bis(4′-pentyloxybiphenyl)ferrocene dicarboxylate ester (1) has been determined by X-ray diffraction at 295 and 160K. The molecule is found to

Synthesis of Optically Pure Helicene Metallocenes.

Two types of ruthenocenes and a ferrocene coordinated by rac-9H-cyclopenta[1,2-c:4,3-c']diphenanthrenyl anion(s), a [7]helicene with a cyclopentadienyl moiety at the center of its skeleton, were

Spectrochemical Study of Microscopic Crystals. VIII. Absorption Spectra of Dicyclopentadienyl-compounds of Iron and Cobalt

Dichroisms of dicyclopentadienyl-iron (II) and dicyclopentadienyl-cobalt (III) perchlorate in the crystalline state have been quantitatively determined. For the two compounds, the common rules on the

Dinickelaferrocene: Ferrocene Analogue with Two Aromatic Nickeloles Realized by Electron Back Donation from Fe.

Dinickelaferrocene 2, a type of dimetallametallocene, is efficiently synthesized from the reaction of dilithionickelole 1 with FeBr2 or FeCl2 presumably via a redox process and is subjected to detailed experimental and theoretical characterizations.

A Uranium Tri-Rhenium Triple Inverse Sandwich Compound.

Calculations suggest that the electropositive uranium center pulls electron density away from the electron-rich rhenium centers, reducing electron-electron repulsions in the rhensium-Cp moieties and thereby strengthening those interactions, while also making uranium-CP bonding more favorable.



A New Type of Organo-Iron Compound

NUMEROUS investigators have studied the reaction of Grignard reagents with anhydrous ferric chloride, but have failed to isolate any organo-iron compounds or to produce any definite evidence for