Reduction electrochimique du ferrocene

A well characterized 1e^? reversible polarographic wave is observed at low temperature (? ?30°C) for ferrocene and methylferrocene in dimethylformamide. At higher temperatures, a 2e reductive cleavage of the molecule occurs.     

Modellrechnungen zum Dendriten-Wachstum in partiell-kristallinen Hochpolymeren

Zusammenfassung Überstrukturen in partiell-kristallinen Thermoplasten liegen oft in Gestalt von Sphärolithen vor. Es wird versucht, ihre Entstehung auf behindertes Dendritenwachstum zurückzuführen. Die durch das Simulationsmodell beschriebenen Strukturen werden mit experimentell beobachteten verglichen.

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Superstructures in partial-crystalline thermoplastics often show the shape of spherulites. The reason of this can be a handicapped growth of dendrites. The structures obtained by a simulation model are compared with those obtained by experiments.

     

Evaluation of ion chromatography for determination of selected ions in geothermal well water

Ion chromatography is evaluated as a technique for the separation and determination of selected anions (fluoride, chloride, bromide, and sulfate) and cations (lithium. sodium, potassium and ammonium) in geothermal well water samples. The results achieved are compared with those obtained by other methods of analysis in a round-robin test.     

IR spectra of selenophenopyrylium salts

On the basis of the IR spectra of 16 alkyl-substituted selenopheno[2,3-c]- and selenopheno-[3,2-c]pyrylium salts and a model calculation of the frequencies and the forms of their normal vibrations, an assignment of the frequencies of the skeletal vibrations of the heterocycles is put forward.Translated from Khimiya Geterotsiklicheskikh Soedinenii, No. 11, pp. 1495–1497, November, 1973.