The cis-isomer of bis-(π-cyclopentadienyldicarbonyliron)

Abstract

Szlmmary The existence of the cis-isomer of [w-C,H,Fe (C0),l2 in the solid state has been established by i.r. and X-ray methods.THE i.r. spectrum of bis-(w-cyclopentadienyldicarbonyliron) 1

Disulfido iron–manganese carbonyl cluster complexes: Synthesis, structure, bonding and properties of the radical CpFeMn2(CO)7(μ3-S2)2

“…The known compound [CpFe(CO) 2 ] 2 can subsequently be eluted from the baseline in approx. 20% yield by using pure CH 2 Cl 2 elution solvent [10,11].…”

The structure of the ether solvate of cis-μ-[benzyl(phenyl)vinylidene]-μ-carbonyl-bis[carbonyl(η5-cyclopentadienyl)iron(0)](Fe–Fe), cis-Fe2(CO)2(η5-C5H5)2(μ-CO)[μ-C=C(C6H5)CH2C6H5].C4H10O

“…The most striking difference in the present structure is the fold angle about the Fe-Fe vector of 24.8 ° , which is on the average about 7-10 ° larger than that found in most of the known bridged diiron complexes. The present structure differs from [(r/5-CsH5)Fe(CO)2]2 (fold angle, 16 o) (Bryan, Greene, Newlands & Field, 1970) in having a CO and a C=C(Ph)CH2Ph bridging system instead of two symmetric carbonyl bridging ligands. If the bulkier ligand in the bridging system is responsible for the greater fold in the present structure, the structure of (~-CsHs)2Fe2(CO)3(C=NPh) (Joshi, Mills, Pauson, Shaw & Stubbs, 1965) which has a phenyl isocyanide bridging ligand and a folding angle of only 14 ° does not justify such an assumption, neither does the structure of FeE(CO)3(rl5-C5H5)2[C=C(CN)2] (Kirchner & Ibers, 1974), where a bridging carbonyl is replaced by a dicyanovinylidene ligand.…”

The crystal and molecular structure of μ-carbonyl-bis(η-cyclopentadienyl)-μ-η-(hexafluoro-2-butyne)-dirhodium (Rh–Rh)

“…The geometry of the cyclopentadienyl groups is not regular, with C-C distances ranging from 1.37 to 1.43 A. The average distances for the individual rings are 1.384 and 1.416 A, and this difference may result from restrictions imposed by molecular stereochemistry and crystal packing on the thermal motion of the rings Bryan, Greene, Newlands & Field, 1970).…”