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Metal Isotope and High Pressure Effects on the Infrared Active Skeletal Vibrations in Metal Sandwich Compounds
Volume 24, Number 6 (Dec. 1970) Page 606-608
Nakamoto, K.; Udovich, Carl; Ferraro, John R.; Quattrochi, A.
Metal sandwich compounds such as ferrocene (FeCp2) and ruthenocene (RuCp2) exhibit the six skeletal modes shown in Fig. 1. Among them, the ring tilt (v5), the metal-ring stretch (v3), and the ring-metal-ring bending (v6) are infrared active under D5h (or D5d) symmetry.