The stability of the new organoiron compound was accorded to the aromatic character of the negatively charged cyclopentadienyls, but they were not the ones to recognize the η5 (pentahapto) sandwich structure.
Stabilitas senyawa organobesi yang baru sesuai sifat aromatik siklopentadienil yang bermuatan negatif, namun mereka bukan orang yang menyadari struktur sandwich η5 (pentahapto).