Crystal structure of bis­{(S)-1-[2-(di­phenyl­phosphan­yl)ferrocen­yl]-(R)-eth­yl}ammonium bromide di­chloro­methane monosolvate

During the synthesis of an FeBr(2) complex with the PNP ligand (R,R,S (Fc),S (Fc))-[Fe(2)(C(5)H(5))(2)(C(38)H(35)NP(2))] (1), single crystals of the di­chloro­methane monosolvate of the Br(−) salt of the protonated ligand 1H(+) were obtained serendipitously, i.e. [Fe(2)(C(5)H(5))(2)(C(38)H(36)NP(2))]Br·CH(2)Cl(2). The crystal structure of 1H·Br·CH(2)Cl(2) was determined by single-crystal X-ray diffraction. The mean bond lengths in the ferrocene units are Fe—C = 2.049 (3) Å and C—C = 1.422 (4) Å within the cyclo­penta­dienyl rings. The mean C—N bond length is 1.523 (4) Å. The inter­planar angle between the two connected cyclo­penta­dienyl rings is 49.2 (2)°. One ferrocene moiety adopts a staggered conformation, whereas the other is between staggered and eclipsed. The Br(−) ions and the CH(2)Cl(2) mol­ecules are located in channels extending along <100>. One ammonium H atom forms a hydrogen bond with the Br(−) ion [H⋯Br = 2.32 (4) Å and C—H⋯Br = 172 (3)°]. The second ammonium H atom is not involved in hydrogen bonding.