Compounds In Dimethylsulfoxide Research Articles

The polarographic behavior of transition metal compounds in dimethylsulfoxide and N,N-dimethylformanide. III. Vanadium and chromium compounds

Polarographic investigations were carried out on vanadium(III) chloride, vanadium(V) oxoperchlorate and chromium(III) chloride in dimethylsulfoxide and N,N-dimethylformamide; the half-wave potentials (vs. aqueous saturated calomel electrode), the nature of the limiting currents, the temperature coefficients of the half-wave potentials and the wave heights, and the reversibility or irreversibility of the electrode processes were determined in 0.1 M solutions of tetraethylammonium perchlorate at 25.0°. VCl 3 shows reversible V III–V II waves, V IV is irreversibly reduced to V II, and CrCl 3 exhibits a polarographic behavior corresponding to the stepwise reduction sequence Cr III–Cr II –Cr 0. The electrode mechanisms, the half-wave potentials in different solvents, analytical aspects and the influence of water have been discussed.

Redistribution reactions with group IV metal compounds in dimethylsulfoxide (DMSO)

Redistribution reactions with group IV metal compounds in dimethylsulfoxide (DMSO)

The controlled potential coulometric and controlled potential polarographic determinations of substituted nitrobenzene compounds in dimethylsulfoxide

The n-values for the reduction of the isomers of nitrophenol and nitrobenzoic acid and for several other nitro compounds were determined in dimethylsulfoxide by controlled potential coulometry. A procedure is given in which one μmole of nitro compound may be determined in less than 8 min with an error of approximately ±l%. The associated background currents were quantitatively evaluated, and electrolysis conditions for their minimization were discussed. A procedure and results are given for the controlled potential polarography of these nitro compounds in dimethylsulfoxide.

Dehydration of Alcohols, Diols, and Related Compounds in Dimethyl Sulfoxide1

Dehydration of Alcohols, Diols, and Related Compounds in Dimethyl Sulfoxide¹

Chemiluminescence of firefly luciferin without enzyme.

We have been able to produce chemiluminescence in firefly luciferin without utilizing the enzyme luciferase. Following the analogous mechanism of the chemiluminescence of luminol in the organic solvent dimethyl sulfoxide, we have prepared synthetically the methyl ester of luciferin, the phosphate ester of luciferin and luciferyl adenylate by condensation in dimethyl sulfoxide with Khorana's reagent, dicyclohexylcarbodiimide and diazomethane, phosphoric acid, and adenylic acid respectively. These compounds in dimethyl sulfoxide in the presence of base emit a bright chemiluminescence. Like in vitro enzymatic bioluminescence, the luciferyl adenylate. chemiluminescence emission spectrum is dependent upon pH.