In hexaferrocenylbenzene, C6[(η5-C5H4)Fe(η5-C5H5)]6, all six positions on a benzene molecule have ferrocenyl substituents (R). X-ray diffraction analysis of this compound confirms that the cyclopentadienyl ligands are not co-planar with the benzene core but have alternating dihedral angles of +30° and −80°. Due to steric crowding the ferrocenyls are slightly bent with angles of 177° and have elongated C-Fe bonds. The quaternary cyclopentadienyl carbon atoms are also pyramidalized. Also, the benzene core has a chair conformation with dihedral angles of 14° and displays bond length alternation between 142.7 pm and 141.1 pm, both indications of steric crowding of the substituents.
In hexaferrocenylbenzene C6[(η5-C5H4)Fe(η5-C5H5)]6 all six positions on a benzene molecule have ferrocenyl substituents (R) X-ray diffraction analysis of this compound confirms that the cyclopentadienyl ligands are not co-planar with the benzene core but have alternating dihedral angles of +30° and −80° Due to steric crowding the ferrocenyls are slightly bent with angles of 177° and have elongated C-Fe bonds The quaternary cyclopentadienyl carbon atoms are also pyramidalized Also the benzene core has a chair conformation with dihedral angles of 14° and displays bond length alternation between 1427 pm and 1411 pm both indications of steric crowding of the substituents