Polarographic Estimation of Thiophenes and Aromatic Sulfides in Petroleum

Abstract

A procedure has been developed for the estimation of thiophenes and

Polarographic Behavior of Aryl Sulfones and Sulfoxides

“…The high values as well as the scatter of results in the determination of n for the reduction of the phenyl methyl compounds are probably due to a concurrent evolution of hydrogen at the very negative potentials employed in these cases. Thus, the most probable value of n in all cases is 2 as found by Levin and Shestov (12) and Drushel and Miller (5) in the case of sulfone reduction. This is also in agreement wdth the reductive cleavage of diaryl and aryl alkyl sulfones with sodium amalgam in boiling ethyl alcohol (I/) or hot xylene (11) to give a sodium sulfinate and a hydrocarbon.…”

“…A number of papers dealing with the polarographic behavior of aromatic sulfones have appeared recently (5,6, 12, 14), but none have established with certainty the reduction products of the electrode reaction. Mairanovskil and Nieman (14) report that aryl sulfones such as phenyl methyl sulfones, phenyl sulfone, and their halogenated derivatives yield two waves, the first diffusion-controlled and the second kinetic in nature.…”

“…Levin and Shestov {12) found that the reduction of phenyl sulfone involves only two electrons (by comparison of the wave height of the sulfone with that of phenyl ketone) and postulated that the reduction products are benzenesulfinic acid, benzene, and hydroxide. Drushel and Miller (5) have made an extensive study of the polarographic behavior of a number of sulfones including phenyl sulfone, benzothiophene 1-dioxide, dibenzothiophene 5-dioxide, and 6a,116-dihydronaphtho [2,[1][2][3][4][5][6] ]-benzo-[d ]-thiophene 7-dioxide. They state that the probable products in the case of the phenyl sulfone reduction are benzenesulfinic acid, benzene, and hydroxide.…”

Efficient room temperature catalytic synthesis of alternating conjugated copolymers via C-S bond activation

“…Recently, the significant need for atom-efficient and environmentally benign chemical synthesis has increased, and turned to process energy-efficiency and starting materials and reagents that must conform to these requirements 14 . Organosulfur compounds that are widely available from nature 15 – 17 often serve as effective electrophiles in transition metal-assisted cross-coupling reactions, such as Liebeskind-Srogl (L-S) coupling in the case of small molecules (Fig. 1a ) 18 .…”

Differential pulse cathodic voltammetric determination of floctafenine and metopimazine

“…It has been reported that several arylsulfone compounds show polarographic reduction peaks at potentials ranging from −1.4 to −2.1 V [15]. A two electron reduction occurs with both aralkyl-and diarylsulfones, and is supposed to form a sulfinic acid derivative and a hydrocarbon [15,16].…”