Fluorinated heterocumulenes

Conclusions An investigation has been carried out into the cycloaddition of alkoxy-substituted alkenes to N-phenylbis(trifluoromethyl)ketenimine, leading to the synthesis of fluorinated quinolines and azetidine.Translated from Izvestiya Akademii Nauk SSSR, Seriya Khimicheskaya, No. 4, pp. 858–862, April, 1976.For No. 12, see [1].     

2-Acetoxy-2-Acetylaminohexafluoropropane and its reactions

Conclusions 2-Acetoxy-2-acetylaminohexafluoropropane has been obtained and some of its reactions have been studied.Translated from Izvestiya Akademii Nauk SSSR, Seriya Khimicheskaya, No. 6, pp. 1108–1110, June, 1966.     

Dienone-phenol rearrangement in reaction of bis(trifluoromethyl)ketene with p- benzoquinone

Conclusions The reaction of bis(trifluoromethyl)ketene with p-benzoquinone leads to the formation of the dienone phenol rearrangement product of the intermediately formed mono--lactone to the-lactone.Translated from Izvestiya Akademii Nauk SSSR, Seriya Khimicheskaya, No. 9, pp. 2107–2108, September, 1972.     

A pinacone from hexafluoroacetone

Conclusions The reaction of hexafluoroacetone with triethyl phosphite was investigated, and dodecafluoropinacone was synthesized.Translated from Izvestiya Akademii Nauk SSSR, Seriya Khimicheskaya, No. 8 pp. 1526–1528, August, 1964     

Molecular-orbital calculation of the electronic spectra of salicylalkylimines

MO methods in the Hückel approximation are used to derive the bond orders, electron-density distributions, dipole moments, and frequencies and strengths of the electronic transitions. The assignment of the absorption bands (on the basis of the energy and intensity results) leaves no doubt that the bands near 400 m, whose intensity is very much dependent on the solvent, are due to n transitions. The electron densities and bond orders for the ground state and for the first two excited states, as well as for the n₁ transition, show that the molecules have a tendency to adopt quinoid structures on excitation. The calculated dipole moment for salicylalmethylimine agrees well with measured values for this class of compound.     

Mechanism of methane activation by electrophiles generated in the AlBr5 system: An MNDO/PM3 study of the potential energy surface of the [AlBr5+CH4] system

Fragments of the potential energy surfaces (PES) of the AlBr₅ (I) and [AlBr₅+CH₄] (II) systems were studied by the MNDO/PM3 method. Five local minima corresponding to Br₂·AlBr₃ donor-acceptor complexes were found on the PES of system I. Two of these complexes have a pronounced ionic character. In system II, among the products of barrierless addition of Br₂·AlBr₃ complexes to CH₄, the methane molecule is activated only in two complexes. These are products of the attack of the most electrophilic AlBr₅ complexes on a H atom of the methane molecule. The potential barriers to conversion of these products into complexes with structures formally corresponding to the products of the attack of electrophiles on a C−H bond (the Olah scheme) or the C atom of methane molecule (the Schreiner scheme) were calculated. Translated fromIzvestiya Akademii Nauk. Seriya Khimicheskaya, No. 5, pp. 802–808, May, 2000.     

Quantum Size Effects in Germanium Nanocrystals and Amorphous Nanoclusters in GeSixOy Films

Physics of the Solid State - Films of nonstoichiometric germanium–silicon glasses of two types—GeOx[SiO](1 – x) and...