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 la
New finding of a stable low-temperature phase in ferrocene crystal
β Scribed by Kouji Ogasahara; Michio Sorai; Hiroshi Suga
- Publisher
- Elsevier Science
- Year
- 1979
- Tongue
- English
- Weight
- 326 KB
- Volume
- 68
- Category
- Article
- ISSN
- 0009-2614
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β¦ Synopsis
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 concluded to be a transition between metastabIe phases
π SIMILAR VOLUMES
Crystalline Cs 2 KMnF 6 , when prepared below 5003C, adopts a tetragonal elpasolite structure type. Di4erential scanning calorimetric investigations indicated that Cs 2 KMnF 6 undergoes a phase transition from the low-temperature tetragonal phase (LT) to a high-temperature phase (HT) at about 5303C.