Synthesis and structure of mono- and dinuclear cyclopentadienyl–indenyl complexes of iron(II) and further reactions to mixed tri- and tetranuclear iron–cobalt complexes

Enantioselective Desymmetrization of 1,2,3-Trisubstituted Metallocenes by Molybdenum-Catalyzed Asymmetric Intraannular Ring-Closing Metathesis

“…The two η 5 -ligands are nearly parallel and the dihedral angle between the two η 5 -C 5 planes is 1.0(2)°. The distances Fe(1)–C(6) and Fe(1)–C(11) are significantly longer than the other Fe(1)–carbon bonds, which can be attributed to the slight distortion of the dihydrofluorenyl ligand toward the η 3 -coordination at C(1)–C(17)–C(12) …”

Iron(II) High‐Spin and Low‐Spin Complexes from Pentaisopropylcyclopentadienyliron(II) Bis(trimethylsilyl)amide

“…The absence of strongly bound π‐acceptor ligands like carbon monoxide, the removal of which often requires photochemical or thermal activation, is an advantage especially in combination with enough thermal stability for convenient storage in the laboratory. Complex 1 was used for the synthesis of pentamethylcyclopentadienyliron(II) half‐sandwich or sandwich complexes with olefin ligands, indenyl ligands, functionalized pyrrolide rings for use as pincer ligands, pentalene ligands for use as building blocks, phospholyl ligands, naphthalene, or anthracene bridges between two Cp*Fe moieties, or bridging thiolate ligands for the stoichiometric and catalytic reduction of methylhydrazine . Complex 1 has also been used for a facile one‐pot synthesis of an iron(III) half‐sandwich catalyst precursor with a tridentate phosphinebis(thiolate) ligand using air for oxidation or for the one‐pot synthesis of the ferrate(0) [(tmeda)Li(µ‐C 2 H 4 ) 2 FeCp*] with lithium sand and ethylene , …”

Structural and spin diversity of M(indenyl)2 transition-metal complexes: a DFT investigation

“…Structurally characterized complexes of type M(Ind) 2 are not scarce. [4][5][6][7][8][9][10] The first crystal structures were published in 1990 by Marder and coworkers, for M = Fe, Co and Ni. 7 Another important contribution to this chemistry comes from the more recent work of Hanusa and coworkers, 4,5 especially concerning the investigation of open shell species.…”

“…Iron bis-indenyl derivatives are known. [8][9][10] They are diamagnetic and adopt a 18-MVE ferrocene-like structure. Previous calculations by Calhorda and Veiros on Fe(g 5 -Ind) 2 have shown that the energy difference between rotamers is small.…”