Molecular complexes ofsym-octahydro-1-chalcogenaanthracene salts with aromatic compounds

Complexes ofsym-octahydro-10-chalogenaanthracene perchlorates with aromatic hydrocarbons, di- and triatomic phenols, naphthols, and aromatic amines can be readily separated in the solid state. Complex formation is clearly shown to lower the oxidative power of the heteroaromatic cations.Translated from Khimiya Geterotsiklicheskikh Soedinenii, No. 1, pp. 27–32, January, 1995.Deceased     

Electrochemical activation of inorganic and simplest organoelement compounds in organic syntheses

Data are presented on the reactivity of silicon and tin hydrides, phosphorus trichloride, and hydrogen sulfide in the anodic single-electron reduction of these reagents to corresponding radical cations. Organic reactions involving them are considered.     

Template Assembling of the Pentadentate Redox-Active Ligand in the Coordination Sphere of Tin(IV)

Heptacoordinated tin complexes with pentadentate redox-active ligands containing the diiminopyridine fragment combined with two sterically hindered phenolate coordination centers, LSn-Cl₂ and L'SnCl₂ (L and L' are dianions of deprotonated 2,6-bis[2,4-di-tert-butyl-6-(methylidenylamino) phenol]pyridine and 2,6-bis[2,4-di-tert-butyl-6-(ethylidenylamino)phenol]pyridine, respectively), are synthesized. The molecular and electronic structures of the synthesized compounds were studied by X-ray diffraction analysis (for complex I, CIF file CCDC no. 1557838), a set of spectral methods, and quantum-chemical calculations. The redox properties of the obtained complexes are characterized by cyclic voltammetry.     

Mechanism of Interaction of γ-Halogenated Salts of Pyrylium and Benzopyrylium with Aromatic Amines

Stoichiometry and kinetics of reactions of 2,6-diphenyl-4-chloropyrylium, 4-chloroflavylium, 4-bromoflavylium, and 4-iodoflavylium perchlorates with nucleophiles N,N-dimethylaniline and n-phenylenediamine are studied using cyclic voltammetry and spectroscopy. Nucleophilic substitution in these compounds proceeds via the formation of a charge-transfer complex, which converts into a radical ion pair as a result of the electron transfer. Heterolytic clevage of the C–Hal bond occurs at the stage of pyranyl (flavanyl) radical.     

Evolution of hydrogen in the reaction of hydroheteroaromatic compounds with dehydrogenating agents

The yields of molecular hydrogen in the reactions of benzimidazolines 1,2-dihydropyrimidines with a number of dehydrogenating agents have been determined. The formation of hydrogen is due to breakdown of the cation-radicals of the hydrohetarenes formed in the first stage of the reactions. The EPR spectrum of the cation-radical from 1,3-dimethyl-2-phenylbenzimidazoline has been obtained.Translated from Khimiya Geterotsiklicheskikh Soedinenii, No. 2, pp. 203–208, February, 1988.     

Oxidation-reduction characteristics of octahydrochalcogenoxanthenes and octahydroxanthylium cations

Unstable radical-cations, which fragment according to the (–e, –H⁺, –e) scheme, are formed during the electrochemical oxidation of chalcogenooctahydroxanthenes. Free radicals (identified by ESR) are formed during the electrochemical reduction of the chalcogenooctahydroxanthylium cations.Translated from Khimiya Geterotsiklicheskikh Soedinenii, No. 1, pp. 47–40, January, 1991.