rac-Dichlorido(1-{(diphenyl­phosphan­yl)[2-(diphenyl­phosphan­yl)phen­yl]meth­yl}ferrocene-κ2 P,P′)palladium(II) dimethyl sulfoxide disolvate

The racemic title compound, [FePdCl2(C5H5)(C36H29P2)]·2(CH3)2SO, features a Pd-chelating 1,3-diphosphine, which is substituted at a P-bearing asymmetric C atom by a ferrocenyl group. The PdII atom is in a distorted quadratic coordination by two P and two Cl atoms with bond lengths of 2.2414 (3) and 2.2438 (3) Å for Pd—P, and 2.3452 (3) and 2.3565 (3) Å for Pd—Cl. The conformation of the Pd complex is controlled by an intra­molecular slipped π–π stacking inter­action between a phenyl and a cyclo­penta­dienyl ring with corresponding C⋯C distances starting at 3.300 (2) Å and the distance between ring centroids being 3.674 (2) Å. The crystal structure is stabilized by C—H⋯Cl and C—H⋯O hydrogen bonds. The (CH3)2SO solvent mol­ecules are arranged in layers parallel to (101) and are linked in pairs by C—H⋯O inter­actions. One (CH3)2SO mol­ecule is orientationally disordered [occupancy ratio 0.8766 (17):0.1234 (17)] with sulfur in two positions at both sides of its C2O triangle

(R,RFc,SRu)-Chlorido(η6-p-cymene){1-[1-(diphenylphosphanyl)ethyl]-2-[2-(diphenylphosphanyl)phenyl]ferrocene-κ2P,P′}ruthenium(II) hexafluoridophosphate

The asymmetric unit of the title compound, [FeRuCl(C5H5)(C10H14)(C37H31P2)]PF6, contains two independent, geometrically similar RuII complexes of a chiral ferrocenyldiphosphane with piano-stool coordination through the η6-bound p-cymene ligand, two chelating phosphorus donor atoms, and an exo-oriented chloride ion. The mean bond lengths of the two Ru complexes are Ru—C = 2.276 Å, Ru—P = 2.3816 Å, and Ru—Cl = 2.3924 Å. Both chloride ligands form only intramolecular C—H...Cl interactions. Seven weak intermolecular C—H...F interactions involving mainly arene H atoms consolidate the crystal packing, which reveals an approximate c/2 pseudo-translation relating the two independent Ru complex molecules

Preparation of Novel Enantiopure Ferrocenyl-Based Ligands for Asymmetric Catalysis

Novel enantiopure ferrocene-based aminophosphine and diphosphine ligands for asymmetric catalysts have been developed. In all cases a highly flexible synthetic approach allowed access to ligands with different ferrocenyl backbones and with a variety of functional group patterns. Procedures for the synthesis of six families of ligands with either a homo- or heteroannularly bridged ferrocene, ferrocenylmethyl, biferrocene, biferroceno-azepine or ferrocenyl-aryl framework are described in detail

{(R,SFc,SFc)-2′′-Bromo-2-[1-(dimethylamino)ethyl-κN]-1,1′′-biferrocene}trihydridoboron

The title structure, [Fe2(C5H5)2(C14H19BBrN)], contains a chiral and asymmetrically 2,2′′-disubstituted biferrocene designed as precursor for enantioselective non-C2-symmetric biferrocenyldiphosphine catalysts. The mean bond lengths in the biferrocene unit are Fe—C = 2.048 (10) Å and C—C = 1.427 (8) Å within the cyclopentadienyl rings. The B—N bond lengths of the BH3 protected amine is 1.631 (3) Å. The interplanar angle between the two connected cyclopentadienyl rings is 54.29 (8)° and the corresponding Fe—Cg—Cg—Fe torsion angle is −52.5°. The conformation of the molecule is stabilized by an intramolecular C—H...Br interaction