Three new enanti­omerically pure ferrocenylphosphole compounds

The absolute configurations of three new enanti­omerically pure ferrocenylphosphole compounds, namely (2S,4S,S_Fc)‐4‐methoxy­methyl‐2‐[2‐(9‐thioxo‐9λ⁵‐phosphafluoren‐9‐yl)­ferro­cenyl]‐1,3‐dioxane, [Fe(C₅H₅)(C₂₃H₂₂O₃PS)], (III), (S_Fc)‐[2‐(9‐thioxo‐9λ⁵‐phosphafluoren‐9‐yl)ferrocenyl]methanol, [Fe(C₅H₅)(C₁₈H₁₄OPS)], (V), and (S_Fc)‐diphenyl[2‐(9‐thioxo‐9λ⁵‐phosphafluoren‐9‐yl]ferrocenylmethyl]phosphine, [Fe(C₅H₅)(C₃₀H₂₃P₂)], (VIII), have been unambiguously established. All three ligands contain a planar chiral ferrocene group, bearing a dibenzo­phos­phole and either a dioxane, a methanol or a diphenyl­phosphino­methane group on the same cyclopentadienyl. In compound (V), the occurrence of O—H⋯S and C—H⋯S hydrogen bonds results in the formation of a two‐dimensional network parallel to (001). The geometry of the ferrocene frameworks agrees with related reported structures.