Silylated Cyclohexadienes as New Radical Chain Reducing Reagents: Preparative and Mechanistic Aspects

Various silylated 1,4-cyclohexadienes are presented as superior tin hydride substitutes for the conduction of various radical chain reductions. Debrominations, deiodinations, and deselenations can be performed using these environmentally benign reagents. Furthermore, Barton-McCombie-type deoxygenations using silylated cyclohexadienes are described. Radical cyclizations, ring expansions, and Giese-type addition reactions with the new tin hydride substitutes are presented. The polymerization of styrene can be regulated using silylated cyclohexadienes. Rate constants for hydrogen atom abstraction from two 1-silyl-cyclohexadienes by primary C-radicals were determined. The effects of the cyclohexadiene substituents on the reaction outcomes are discussed. Finally, qualitative EPR experiments on silyl radical expulsion from silylated cyclohexadienyl radicals are presented.</p

International Workbook: Political Participation (Germany)

Exercise sub-dataset for the Workbook ´Political Participation´. Topics: personal opportunities to influence the government; political interest; following the election campaign; participation in election events; personal party donations; election participation at the last election; party identification and party membership; evaluation of one´s own economic situation; most important political topics. Demography: age; sex; marital status; religious denomination; frequency of church attendance; school education; union membership; occupational position of respondent or father; employment; characteristics of head of household.Übungsteildatensatz zum Workbook "Political Participation". Themen: Eigene Einflussmöglichkeit auf die Regierung; politisches Interesse; Verfolgung des Wahlkampfes; Teilnahme an Wahlveranstaltungen; eigene Parteispenden; Wahlbeteiligung bei der letzten Wahl; Parteiidentifikation und Parteimitgliedschaft; Bewertung der eigenen ökonomischen Situation; wichtigste politische Themen. Demographie: Alter; Geschlecht; Familienstand; Konfession; Kirchgangshäufigkeit; Schulbildung; Gewerkschaftsmitgliedschaft; berufliche Position des Befragten bzw. des Vaters; Berufstätigkeit; Charakteristika des Haushaltvorstands