Madeline S. Toy

Ultrasonic photolysis of methyl disulfide and hexafluorobutadiene

Abstract An ultrasonic photolytic method was described for preparing adducts of hexafluorobutadiene and methyl disulfide. In the presence of an excess CH 3 SSCH 3 , the major product was trans -1,4-bis(methylthio)hexafluoro-2-butene. The minor products were the 1:2 adducts (CH 3 SSCH 3 ·2C 4 F 6 ) in the presence of a mixture, which consisted of a small amount of other oligomeric mixtures and isomeric 1:1 adducts.

Ultrasonic digestion of low molecular weight organics and bacterial decontamination in water

Abstract This study reports the use of ultrasound in destructing low molecular weight organic compounds (alcohols, ketones and aldehydes) in dilute concentrations and bacterial decontamination in water at ambient temperature. An aqueous flow cell system was assembled to measure the formate and acetate products by an on‐line ion chromatograph. The formation of formate and acetate supports an oxidative mechanism and increases with decreasing flow rates. The bactericidal effect of sonication in static water was found to increase with increasing sonolysis times and volumes of the headspace (argon atmosphere over atmospheric air) above the liquid in the enclosed vessel.

High pressure isomerization of 1,4-bis(methylthio)hexafluoro-2-butene to-1-butene

Abstract The complete bond migration of the internal olefinic bond of trans-1,4-bis(methythio)hexafluoro-2-butene(I) under high pressure to the terminal olefinic bond to form cis- and trans-1,4-bis(methylthio)hexafluoro-1-butene(II) is described. The Teflon-lined high pressure cell maintains a constant pressure at 16,000 atm and 180 to 200°C for 24 hours. The cis- and trans-II are elucidated from gas chromatography-mass spectroscopy, which shows two identical parent ions at m/e value of 255(C 6 H 6 F 6 S 2 + ), but at different elution times. The 19 FNMR data of the isomeric products are summarized. Elemental analysis of II is verified by double focussing high resolution mass spectrometer.

Temperature Effects on Electronic Spectral Absorptions of Aqueous Electrolyte Solutes I: An Optical Microautoclave

A high-temperature optical microautoclave for maintaining aqueous solution at elevated temperatures and pressures is described. The apparatus is being used to monitor the chemical processes taking place during temperature cyclings. Some spectra of copper(II) and iron(II) solutions are presented as examples up to 200°C and 15.3 atm estimated pressure.