Matches in SemOpenAlex for { <https://semopenalex.org/work/W989644917> ?p ?o ?g. }
- W989644917 endingPage "151" @default.
- W989644917 startingPage "39" @default.
- W989644917 abstract "The 1,2- and 1,3-dithiolium ions are unsaturated five-membered ring cations in which each of the two ring sulfur atoms can contribute a free pair of 3ρП electrons to the mesomeric bond system. The chapter discusses the methods of preparation, chemical properties, and physical properties of 1,2- and 1,3-dithiolium ions. The 1,2-dithiolium ion is prepared from open-chain compounds and from 1,2-dithiole derivatives. There is some qualitative evidence indicating that the 1,2-dithiolium salts are generally less susceptible to solvolysis than are the tropylium salts. The 1,2-dithiolium salts are electron-deficient compounds and as such are very reactive and unselective towards nucleophilic reagents. There are at present no detailed data available as to whether and to what extent the formation of isothiazoles from unsymmetrically monoaryl-substituted 1,2-dithiolium salts is stereoselective or how the ratio of the isomers can be influenced by variation of the substitution. The 1,3-dithiolium ion is prepared from open-chain compounds and from 1,3-dithiole derivative. There is no quantitative studies have so far been carried out on the thermodynamic stability of the 1,3-dithiolium ion and in view of the limited experimental data available it is impossible to draw any definite conclusions regarding the dependence of stability on the nature of the substituents. Slight differences in the electrophilic character of 1,2- and 1,3- dithiolium salts are shown by their behavior towards aromatic compounds." @default.
- W989644917 created "2016-06-24" @default.
- W989644917 creator A5006470706 @default.
- W989644917 creator A5068363740 @default.
- W989644917 date "1967-01-01" @default.
- W989644917 modified "2023-09-26" @default.
- W989644917 title "The 1, 2- and 1, 3- Dithiolium Ions" @default.
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