Elastic scattering of an electron by the negative lithium ion

In the framework of the many-body theory, the differential and total cross sections of elastic scattering of slow electrons by the negative lithium ion Li⁻ are obtained. Calculations are performed both in the Hartree-Fock single-particle approximation and with regard to many-electron correlations, which take into account the dynamic polarization of the core. Features observed in the behavior of the phases and cross sections for p and d partial waves are associated with resonance scattering of electron waves. Considering the dynamic polarization of the core by an incident electron heightens the diffraction character of the scattering. The real process is compared with particle scattering in models with a repulsive potential.     

Nitrogenous heterocycles. 6. Reactions of organomagnesium derivatives of 7-aza- and benzoindoles with diethyl oxalate and the reactivity of ethoxalylindoles

The reactions of organomagnesium derivatives of 2-methyl- or 2,3-dimethyl-7-azaindoles and 2,3-dimethylbenz[4,5]- or -[6,7]indoles with diethyl oxalate, and the reactivity of the resulting ethoxalylindoles towards phenylmagnesium bromide, have been examined. It has been shown that the course of the reaction is dependent on the solvent and the structures of the starting materials.No footnote given in Russian original — Publisher.Translated from Khimiya Geterotsiklicheskikh Soedinenii, No. 9, pp. 1206–1209, September, 1987.     

Organodimagnesium derivatives of thiophene

It was established that 2,5-dibromo-3-R-4-arylthiophenes form organodimagnesium compounds in ether with the accompaniment of dibromoethane. It is shown that because of steric hindrance, only 2-ethoxalyl-3-R-4-arylthiophenes are formed in the reaction of the organodimagnesium compounds with diethyl oxalate. It was established that the bromomagnesiumethoxycarbinolates obtained from the indicated thiophenes and bromomagnesium ethoxide have high thermal stabilities. The IR and PMR Spectra of the synthesized compounds were studied.See [1] for Communication 3.Translated from Khimiya Geterotsiklicheskikh Soedinenii, No. 6, pp. 754–757, June, 1982.     

Continuous catalytic Friedel-Crafts acylation in the biphasic medium of an ionic liquid and supercritical carbon dioxide

Immobilisation of catalytically-active metal salts in ionic liquids, with extraction by supercritical carbon dioxide, affords continuous Friedel-Crafts acylation, with in situ-recycling of the catalyst.     

Reactions of halometal alkoxides

Aryl thenyl and aryl aryl-α-thienylmethyl sulfides have been obtained by the action of oxalic acid esters on an equimolecular mixture of bromomagnesium thienyl or aryl α-thienyl carbinolates and bromomagnesium thiophenolates (or thionaphtholates). Derivatives of the sulfides, sulfoxides and sulfones, are also described.