Terahertz vibrational spectra of metallocene

The terahertz transmission spectra of crystalline metallocenes and decamethyl metallocene were clearly measured in the range of 0.7–6.2 THz by a recently developed GaP Raman terahertz spectrometer. The low-frequency mode of ring–metal–ring bending and CH3 out-of-plane oscillation were observed, and the force constants of bending were estimated from the absorption frequencies based on a three-body model.