This review article presents an overview of the chemistry of phenyl-ethenyl oligomers containing ferrocene. The synthetic procedures, electronic spectra, electrochemistry and molecular structures are briefly described, pursuing a rationalized relation with the physical outputs (especially regarding the nonlinear optical responses). All the properties of the compounds described are clearly dependent on the conjugated character of the ancillary ligands of the ferrocene. Three types of complexes are described: mono-dimensional conjugated oligomers, compounds with linked ferrocenes, and two-dimensional star-shaped (dendrimers) ferrocenyl compounds.