Raman spectra of gaseous and matrix-isolated SO3

✍ Scribed by Sheng-Yuh Tang; Chris W. Brown

• Publisher: John Wiley and Sons
• Year: 1975
• Tongue: English
• Weight: 180 KB
• Volume: 3
• Category: Article
• ISSN: 0377-0486
• DOI: 10.1002/jrs.1250030409

✦ Synopsis

Infrared and Raman spectra of gaseous and liquid SO, have been investigated for several decades [l-91. However, because SO, is highly reactive, forms trimers in the liquid, and is distorted in condensed phases, there have been some doubts about the vibrational assignments of monomeric SO,.

Vapor pressure measurements [lo] have shown that SO, is momomeric in the gas phase, and its planar D,, structure has been established by electron diffraction [ll]. With D,, symmetry, SO, has four vibrational modes; a', (vl) is Raman active, ui (v,) is infrared active, and the two e' modes (v, and v4) are both Raman and infrared active. From early investigations, v, and v4 were assigned to bands at 530 and 650 cm-', respectively [12]. Later, v2 and v4 were assigned to bands at 490 and 530 cm-', respectively [3, 5, 61, and the 650 cm-I band was assigned to a trimer * To whom all correspondence should be sent.