Chiral 1D Cyanide‐Bridged Bimetallic Compounds Build With Enantiomorphic Pentagonal Bipyrimidal M(II) Units

Abstract Chiral 1D coordination compounds formed by association of either of the enantiomers of ML (MeOH) ClCl (with M=Mn II or Fe II ; L stands for either R or S enantiomer of a pentadentate macrocycle) and NBu 4 Fe III (bpb) (CN) 2, namely: 1D‐Fe III (bpb) (CN) 2 M II (L R) (PF 6) and 1D‐Fe III (bpb) (CN) 2 M II (L S) (PF 6) with M=Mn (2R, 2S) and Fe (3R, 3S). The bis (triphenylphosphine) iminium salt of the metallo‐ligand, PNPFe III (bpb) (CN) 2 ⋅2H 2 O, 1 b, is also described. Their preparations, crystal structures, optical and magnetic properties are reported. Mössbauer spectroscopy confirmed the oxidation state in the Fe II −Fe III chain, for which AC susceptibility suggests SCM behavior, but for very low T.