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Studies on the Phase Transition near the Melting Point in Acetylferrocene

1984; Oxford University Press; Volume: 57; Issue: 9 Linguagem: Inglês

10.1246/bcsj.57.2361

1348-0634

Kumiko Sato, Motomi Katada, Hirotoshi Sano, Michiko Konno,

Force Microscopy Techniques and Applications

Abstract The entitled compound shows an anomalous temperature dependence of the mean-square amplitude of iron atoms derived from the Lamb-Mössbauer factor near the melting point. To clarify the anomaly, the crystal structure of this compound was determined at room temperature by X-ray diffraction. The crystal is monoclinic with space group P21/c, a=20.595(2), b=5.7909(4), c=18.840(2) Å, β=116.870(7)°, U=2004.4(3) Å3, and Z=8. Weissenberg and oscillation photographs taken at a high temperature lead us to propose a model in which the acetylferrocene molecules rotate around the central iron atoms.