A stable lowtemperature phase nearly found in ferrocene is transformed into the usual high-temperature phase at 242 K, the enthalpy and entropy of transition being (4.145 + 0.005) kJ mol-' and (17-13 = O-02) JK-' mol-'. The well-known phase transition at 163.9 K found by Edwards et aL has been concl
Laser raman spectra of the stable low-temperature phase of ferrocene
โ Scribed by Michio Sorai; Shigemi Murkawa; Kouji Ogasahara; Hiroshi Suga
- Publisher
- Elsevier Science
- Year
- 1980
- Tongue
- English
- Weight
- 413 KB
- Volume
- 76
- Category
- Article
- ISSN
- 0009-2614
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โฆ Synopsis
Laser Raman spectra of ferrocene crystal are recorded for the stable (orthorhombrc) and merastable (trichmc) lowtemperature phases. and the stable and undercooled (monochmc) high-temperature phases The skeletal vlbratlonal modes CI~(A,,) and c L6(ElJ], the CH bendmg ( L) mode [ r~~(E2,JJ. and the lattice modes below 100 cm-' show charactetlstlc changes among these phases
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Raman spectra of solid selenium dioxide at temperatures between 15 K and 295 K are reported. No evidence of a solid state phase transition in this range is found. Small wavenumber shifts and significant sharpening of spectral features are observed at low temperatures, the latter resulting in many mo