High-pressure Raman study of liquid and molecular crystal at room temperature. 1,2-dibromoethane

✍ Scribed by H. Shimizu; N. Miyahara

• Publisher: Elsevier Science
• Year: 1984
• Tongue: English
• Weight: 420 KB
• Volume: 110
• Category: Article
• ISSN: 0009-2614
• DOI: 10.1016/0009-2614(84)85473-1

✦ Synopsis

Raman spectra of liquid and crystalline CHzBrCHzBr have been measured at hydrostatic pressures up fo 120 kbar and at 300 K in a gasketed diamond anvil cell. The pressure dependence of eight intramolecular and three intermolecular (lattice) modes is reported. All intramolecular vibrations show a change in their hish-pressure behavior at 63 kbar. In particular, the anomalies of the CzBr bending and the CBr stretching modes strongly indicate a pressure-induced phase transition at 63 kbar in crystalline CH2BrCH2Br. The observed three intermolecular vibrations under high pressure are compared with the previous results about the low-temperature solids CHzBrCHzBr and CH~CICH~CI at atmospheric pressure_