High intensity mercury arc light sources were constructed for the investigation of Raman spectra. Raman tubes for liquids and gases were made and used for the study of the Raman Effect in liquid and gaseous carbon disulfide. The spectrum of liquid CS₂ was obtained using exposure times ranging from three minutes to two hours. The two principal Raman bands and one companion line for each band were observed and measured to an accuracy of within±0.5 cmˉ¹. The values found for the frequency shifts agree, within experimental error, with those of Langseth, Sorensen and Neilsen( 24). The spectrum of gaseous CS₂ was obtained with the gas at three atmospheres pressure and exposure times of twelve to thirty hours. Three previously unreported lines were observed in addition to the band reported by Imanishi(20) at 655 cmˉ¹. Their frequencies are compared below with those observed in the spectrum of liquid CS₂. (Formula omitted) / Science, Faculty of / Physics and Astronomy, Department of / Graduate

Thesis (Ph. D.)--University of Wisconsin--Madison, 1983. / Typescript. Vita. eContent provider-neutral record in process. Description based on print version record. Includes bibliographical references.

The objects of this research were twofold: 1. To develop apparatus and experimental techniques to shorten the exposure times in the study of the vibrational Raman effect of liquids and liquids in the solid state. 2. To use the above in the investigation of the vibrational Raman spectra of the liquid and solid states of Carbon Disulfide. Concurrently, other workers were investigating the infrared absorption spectrum of CS2. The two projects, when integrated, should give a reasonably complete basis for the description of the CS2 molecule. / Science, Faculty of / Physics and Astronomy, Department of / Graduate

The infrared absorption spectrum of carbon disulphide in the vapour state has been remeasured in the region from 2 to 15 microns. A total of six bands were measured in the region less than 15 microns. They were located at 3.38, 3.51, 4.29, 4.58, 6.52, and 11.4 microns. The measurements were made with a Perkin-Elmer spectrometer with a D.C. breaker type amplifier and Brown recorder. Cell lengths up to 100cm were employed. The wave lengths of the observed absorption hands are given in a table, and graphs are shown of the percentage transmission over the wave drum setting of the spectrometer. Phase shifting thyratron circuits, suitable for the accurate control of conditions of the absorbing media, are discussed. Of interest are the measurements of the structure of the Ʋ ₃ band at 1535 cmˉ¹. The side band located at the long-wave length side of the Ʋ₃ band is due to the isotopic effect produced by C¹³. The bands obtained are such as to support the conclusion that carbon disulphide is a linear triatomic molecule. / Science, Faculty of / Physics and Astronomy, Department of / Graduate

This paper deals with the problem of setting up an infrared spectrometer and recorder under suitable conditions, and in applying the instrument to the absorption spectrum of CS₂ in the vapor phase. Six absorption bands, corresponding to the fundamental vibration V₃ at 1535 cm⁻¹, the difference band V₃ - V₁, at 877 cm⁻¹, and the four combination bands V₁ + V₃ at 2185 cm⁻¹, V₃ + 2V₂ at 2332 cm⁻¹, V₃ +2V₁ at 2838 cm⁻¹, and V₁ + V₃ + 2V₂ at 2959 cm⁻¹ have been examined. Using this value for V₃, a better agreement between the force constant of the C S bond, calculated from V₃, with that calculated from V₁, is obtained. The work is to be continued. / Science, Faculty of / Physics and Astronomy, Department of / Graduate

?The body of this work spans both fundamental organometallic chemistry and the application of previously studied catalyst systems to produce new polymeric materials. The cone angle of triphenylphosphite was estimated to be 128 degrees by Tolman in the late 70s; however, metal complexes bearing this ligand undergo cis/trans isomerization via a mechanism indicative of greater steric requirements. X-ray crystallographic studies coupled with data compiled from the Cambridge Crystallographic Database, were used to more accurately calculate the steric demand of this wieldy used ligand to be approximately 140 degrees. Additionally, in depth kinetic studies of the interaction of furan ligands with electron deficient manganese and chromium metal centers were performed. Data collected from timescales ranging from minutes to microseconds was utilized to calculate the bond dissociation energy of both 2,3-dihydrofuran (DHF) and furan. The aromatic furan ligand was found to bind to the both metals 7-10 kcal mol-1 weaker than DHF. Additionally, the more electron rich chromium center was found to bind both ligands ?weaker than the manganese center implying a minimization of the M-L pie -back bonding interaction. Solution studies coupled with DFT calculations were utilized to estimate the extent that the furan ligand is dearomatized by approximately 50% upon interaction with the metal center. Application-based studies of the separation of polymer catalyst mixtures were also undertaken. The addition of the 1000 Dalton poly(isobutylene) arms to the salen ligand in (salen)CrCl complexes yielded a catalyst that could be extracted from the reaction mixture containing poly(cyclohexene carbonate) via the addition of heptane. Another approach, not requiring catalyst modification, utilized a secondary amine to facilitate the purification of the polymer product. The reaction of an amine with CO2 to form an ionic liquid resulted in the precipitation of the polymer while the catalyst and byproducts remained in the liquid carbamate phase. Both approaches provided improvements over the long standing method of precipitating the polymer using methanol and strong acid. Lastly, the previous work of the Darensbourg group utilizing (salen)CrCl catalyst to produce polycarbonates from CO2 and epoxides was employed to synthesized sulfur rich poly(thiocarbonate)s. The effects of both CS2 loading and temperature on the copolymerization of CS2 and cyclohexene oxide were studied. Optimal conditions of 1 equivalent of CS2 and 50 degrees C were found to selectively produce the desired polymeric material. The observation of multiple thiocarbonate as well as carbonate functionalities, led to a detailed study of the reaction byproducts to gain insight into the copolymerization process.

Sulfur-containing organic solvents or carbon disulfide have been used extensively in semiconductor, TFT-LCD, and synthetic fiber (viscous rayon) industries in the last decades. These compounds can easily be converted into reduced-sulfur ones which exhibit low odor threshold characteristics and arise public complaints once releasing into environments. This paper intended to oxide these compounds by both chemical and biological approaches for the purpose of odor reduction. The first topic was investigations on the oxidation of aqueous DMS (dimethyl sulfide) by using sodium hypochlorite as an oxidant. Results indicated that with an initial DMS concentration of 100 mg/L, it required only 0.75 min or 45 s to convert the DMS completely into its final oxidation product, DMSO2 (dimethyl sulfur dioxide). The required dosage of the oxidant was a little less than the theoretical value. In addition, it was found that initial pH of the batch reaction liquid be kept at around 8.2 for achieving a neutral final solution which emitted only a trace of gaseous chlorine and hydrochloric acid odors. The second one was a trail investigation on the biodegradation of gas-borne hydrogen sulfide and carbon disulfide by a trickling-bed biofilter packed solely with fern chips. Glucose and milk powder were used as main nutrients for microbial film development and enhancer for the biodegradation of sulfides. Results indicated that after an acclimation period of around two months, approximately 99 and 86% of the influent hydrogen sulfide (10-20 ppm) and carbon disulfide (20-60 ppm), respectively, could be removed with an empty bed retention time of around 63 s for the gas in the packed bed. Both neutral or acidic environments were suitable for the biodegradation reaction and the metabolites (mainly, sulfuric acid) could easily be removed from the chips by washing them with water. In the future, efforts should be done to increase the removal capacity of carbon disulfide.

Thesis (M.S.)--University of Missouri, School of Mines and Metallurgy, 1928. / The entire thesis text is included in file. Typescript. Title from title screen of thesis/dissertation PDF file (viewed December 7, 2009) Includes bibliographical references (p. 25-26).

No description available.

The purpose of this thesis is to explore the nonlinear refractive index of carbon disulfide vapors as opposed to its liquid form. With CS[sub2] vapors, the vapors are less dense so they will rotate longer than liquid CS[sub2] because there are less intermolecular interactions. The electric field of the beam causes the molecules to align with the electric field and applies a torque to the molecules. After this excitation, the molecules continue rotating. The rotations change the index of refraction of the material. Continuous rotation of the molecules causes the index of refraction to be periodic which means the molecules are going through multiple revivals. I will analyze this periodic nonlinear index of refraction. However, some problems occurred while the experiment was being done as well as some issues of measuring CS[sub2] because of white light continuum generation in the cell walls. To avoid these issues we measured the air in the lab and were able to observe the periodic change of index of refraction for O[sub2] and N[sub2].