rac-(S,S)-Bis(1-ferrocenylbut-3-en­yl) ether

The title complex, [Fe₂(C₅H₅)₂(C₁₈H₂₀O)], formed by dehydration of 1-ferrocenylbut-3-en-1-ol, crystallizes as a racemic compound. The central C-O-C fragment, in which the C atoms are the chiral centers, is characterized by an angle of 116.26 (10)° at the O atom. One ferrocene group shows a staggered conformation whereas the other shows an eclipsed conformation.

4-Meth­oxy-3-(meth­oxy­meth­yl)benzalde­hyde

In the title compound, C₁₀H₁₂O₃, the dihedral angle between the benzene ring and the meth­oxy­methyl side chain is 9.7 (2)°. The O atom of the aldehyde group and the C atom of the meth­oxy group deviate from the plane of the ring by 0.039 (3) and 0.338 (4) Å, respectively. The only inter­molecular inter­actions are very weak C—H...π inter­actions.