Laser raman spectra of the stable low-temperature phase of ferrocene

Laser Raman spectra of ferrocene crystal are recorded for the stable (orthorhombic) and metastable (triclinic) low-temperature phases, and the stable and undercooled (monoclinic) high-temperature phases.The skeletal vibrational modes [v₄(A_1g) and v₁₆(E_1g)], the CH bending (⊥e) mode [v₂₅(E_2g)], and the lattice modes below 100 cm^?1 show characteristic changes among these phases.