No abstract

Polarographic and cyclic voltammetric measurements were carried out with the aid of a Princeton Applied Research Model 170 electrochemical instrument. Polarograms were measured in the conventional manner before and after addition of known amounts of proton donor.Cyclooctatetraene was purified by vacuum distillation under nitrogen. Purity of the other hydrocarbons was assessed by thin layer chromatography. If more than one spot was observed, the hydrocarbon was purified by column chromatography, sublimation, and/or recrystallization. Dimethyl sulfoxide (Matheson Coleman and Bell) was used as received. Tetrabutylammonium perchlorate (Southwestern Analytical Labs), the supporting electrolyte, was dried in an Abderhalden drying pistol.Acknowledgment. Financial support was provided by the National Science Foundation. The Uniroyal Corp.provided a summer research assistantship for A. S. Miss Ling Ling Chung made the initial observations upon 9,10-diphenylanthracene and anthracene which led to this study.

No abstract

Phenylessigsäuremethylester (I) kondensiert mit Oxalsäuredimethylester (II) zum Acylierungsprodukt (III), ‐ das über eine Reaktion mit p‐Chlorphenylacetylchlorid zu (IV) zum ungesättigten Lactonol (V) kondensiert wird.

Aus dem bekannten Dilacton (I) erhält man mit Thioessigsäure die Schwefelverbindung (II), die mit Methylat in das Monothiololacton (III) übergeht, das thermisch ′ (II) zurückbildet.