The infrared spectra of gaseous and liquid sulphur trioxide

1966 ◽  
Vol 19 (6) ◽  
pp. 931 ◽  
Author(s):  
ECM Grigg ◽  
GR Johnston
Keyword(s):  
Infrared Spectra ◽  
Gas Cell ◽  
Liquid Sulphur ◽  
Sulphur Trioxide

The infrared spectra of both gaseous and liquid sulphur trioxide have been investigated between 4000 and 650 cm-1. A gas cell for use with very reactive compounds has been described.

THE RAMAN SPECTRA OF LIQUID SULPHUR TRIOXIDE AND SOLUTIONS OF SULPHUR TRIOXIDE IN INERT SOLVENTS

1961 ◽  
Vol 39 (11) ◽  
pp. 2189-2200 ◽  
Author(s):  
R. J. Gillespie ◽  
E. A. Robinson
Keyword(s):  
Carbon Tetrachloride ◽  
Raman Spectra ◽  
Sulphur Dioxide ◽  
Monomeric Form ◽  
Polymeric Form ◽  
Cyclic Trimer ◽  
Low Concentrations ◽  
Polymeric Species ◽  
Liquid Sulphur ◽  
Sulphur Trioxide

The Raman spectra of liquid sulphur trioxide and of sulphur trioxide dissolved in a number of "inert" solvents have been investigated. A detailed analysis of the spectrum of liquid sulphur trioxide supports the earlier suggestion of Gerding and Nijveld that the main polymeric species in liquid sulphur trioxide is the cyclic trimer. Frequencies are assigned for all the Raman active vibrations of the cyclic trimer. These assignments differ substantially from those given previously by Gerding and Nijveld.The spectra of dilute solutions of sulphur trioxide in sulphur dioxide, sulphuryl chloride, carbon tetrachloride, tetrachlorethylene, and trichlorfluormethane (Freon 11) show that the sulphur trioxide is present mainly in the monomeric form at low concentrations while at higher concentrations a polymeric form, which is very probably the trimer, is also present.

Raman Effect of Gaseous and Liquid Sulphur Trioxide and of Mixtures of the Trioxide with the Dioxide

Nature ◽  
1936 ◽  
Vol 137 (3477) ◽  
pp. 1033-1033 ◽  
Author(s):  
H. GERDING ◽  
W. J. NIJVELD ◽  
G. J. MULLER
Keyword(s):  
Raman Effect ◽  
Liquid Sulphur ◽  
Sulphur Trioxide

A Simple Directly Combined Gas Chromatographic-Infrared Spectrometric System for Identification of Low Molecular Weight Hydrocarbons

1975 ◽  
Vol 29 (1) ◽  
pp. 15-24 ◽  
Author(s):  
C. W. Louw ◽  
J. F. Richards
Keyword(s):  
Molecular Weight ◽  
Air Pollution ◽  
Cell Volume ◽  
Infrared Spectra ◽  
Trace Analysis ◽  
Low Molecular Weight ◽  
Gas Cell ◽  
Light Pipe ◽  
Sample Component ◽  
Spectrometric System

A simple directly combined gas chromatographic-infrared spectrometric system suitable for the identification of low molecular weight hydrocarbon-type compounds is reported. It incorporates a 30-m × 0.5-mm i.d. SCOT Silicone DC-550 column and a micro light pipe gas cell (volume 0.6 ml) fitted on a kinematic mounting into the sample compartment of a conventional ir spectrophotometer. Sensitivity is enhanced by a gas chromatographic fraction concentrator, a 10-cm × 1.0-mm i.d. 10% Silicone SE-30/Chromport A (80 to 100 mesh) column, situated upstream of the gas cell. The performance of the system is demonstrated for synthetic mixtures of C6 — C10 paraffinic, olefinic, and aromatic types of hydrocarbons. Infrared spectra can be taken at 5- to 6-min intervals at levels of 14 to 19 µg per sample component. This system has potential for application in the field of trace analysis, e.g., air pollution.

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