Applying valence bond theory to ferrocene by considering an Fe2+ centre and two cyclopentadienide anions (C5H5−), which are known to be aromatic according to Hückel's rule and hence highly stable, allowed correct prediction of the geometry of the molecule.
Menerapkan teori ikatan valensi ke ferosena dengan mempertimbangkan suatu pusat Fe2+ dan dua anion siklopentadienida (C5H5−), yang dikenal aromatik menurut aturan Hückel dan karenanya sangat stabil, memungkinkan prediksi yang benar dari geometri molekul.