The synthesis and liquid crystal behaviour of monosubstituted ferrocenomesogens

4-ferrocenylphenol

The title compound, [Fe(C₅H₅)(C₁₁H₉O)], is of inter­est as a precursor to the synthesis of cheap ferrocene-based liquid crystals. The –OH substituent only results in weak C—H⋯O weak inter­actions between one of cyclo­penta­dienyl (Cp) ring H atoms and the O atom of a neighbouring mol­ecule with a distance of 3.308 (3) Å between the donor and acceptor atoms. The inter­planar angle between the Cp and benzene rings is 13.0 (4)°. There are also weak O—H⋯π and C—H⋯π inter­actions involving the unsubstituted Cp and the benzene ring, respectively.

1-(4-Bromo-phen-yl)ferrocene

In the title compound, [Fe(C₅H₅)(C₁₁H₈Br)], the distance of the Fe atom from the centroids of the unsubstituted and substituted cyclo­penta­dienyl (Cp) rings is 1.644 (1) and 1.643 (1) Å, respectively. The ferrocenyl moiety deviates from an eclipsed geometry, with marginally tilted Cp rings and an inter­planar angle between the Cp and benzene rings of 13.0 (4)°. The crystal structure is stabilized by C—H⋯π inter­actions between a cyclo­penta­dienyl H atom and the cyclo­penta­dienyl ring of a neighbouring mol­ecule.