Reaction of perfluoro ketones with hexamethyldisilazane

Conclusions Perfluoro ketones react with hexamethyldisilazane under mild conditions to give 2-trimethylsilyloxy-2-trtmethylsilylaminoperfluoropropanes.Translated from Izvestiya Akademii Nauk SSSR, Seriya Khimicheskaya, No. 10, pp. 2352–2353, October, 1972.     

Synthesis of five-membered heterocyclic compounds from perfluoro-α-lactam

Conclusions 1-(Perfluoro-tert-butyl)-3,3-bis(trifluoromethyl)aziridin-2-one enters into cyclic addition reactions with carbonyl compounds and with nitriles, forming oxazolidones and imidazolones. Cyclic addition to perfluoro--lactam takes place, depending on the type of reagent, with rupture of any of the bonds in the three-membered ring.Translated from Izvestiya Akademii Nauk SSSR, Seriya Khimicheskaya, No. 10, pp. 2343–2346. October, 1981.     

Reaction of perfluoroisobutylene with tributylphosphine

Conclusions Perfluoroisobutylene under the influence of tributylphosphine in ether gives phosphorus-containing transformation products of heptafluoroisobutylenyltributylfluorophosphorane, while in acetonitrile it undergoes defluorodimerization to give perfluorotetramethylbutadiene and cross-conjugated perfluorobis(isobutenyl)isobutylene.Translated from Izvestiya Akademii Nauk SSSR, Seriya Khimicheskaya, No. 2, pp. 383–336, February, 1981.     

Fluorine-containing heterocumulenes 15. Bis(trifluoromethyl)ketene N-(benzenesulfonyl)imine in reactions with vinyl ethyl ether and phenylacetylene

Conclusions We have examined the cycloaddition of vinyl ethyl ether and phenylacetylene to bis (trifluoromethyl) ketene N-(benzenesulfonyl) imine, which forms fluorine-containing azetidines, azetines, and cyclobutenes.For communication 14, see [1].Translated from Izvestiya Akademii Nauk SSSR, Seriya Khimicheskaya, No. 4, pp. 880–883, April, 1978.     

Interaction of 1-tert-perfluorobutyl-3,3-di(perfluoromethyl)-2-aziridinone with weak nucleophiles

The title perfluoro--lactam (1) was found to react with N,N-dimethylformamide to give initially a betaine (2) which undergoes ring enlargement to produce the isomeric 2-dimethylamino-3,4,4-tri(perfluoroalkyl)substituted 5-oxazolidone (3). Related betaines were also obtained on reaction of1 with pyridine, quinoline, benzalaniline, andp-dimethylaminobenzaldehyde.Translated fromIzvestiya Akademii Nauk. Seriya Khimicheskaya, No. 2, pp. 372–374, February, 1993.     

Fluoro-contaiming heterocumulenes

Conclusions A stydy was made of the reaction of oxygen transfer from nitrones to N-aryl-bis(trifluoromethyl)-ketenimines, which leads to the formation of oxindoles.See [l] for Communication 7.Translated from Izvestiya Akademii Nauk SSSR, Seriya Khimicheskaya, No. 11, pp. 2566–2572, November, 1973.     

Perfluoro-1,2-diisopropylidene-3,3-dimethylcyclobutane — A new cross-conjugated perfluorotriene isomer

Conclusions In the reaction of perfluoro-,-bis(isobutenyl)isobutylene with CsF a new cyclic isomer-perfluoro-1,2-diisopropylidene-3,3-dimethylcyclobutane — was obtained.Translated from Izvestiya Akademii Nauk SSSR, No. 6, pp. 1341–1344, June, 1986.     

Molecular and electronic structure of some bowl-shaped unsaturated hydrocarbon molecular systems,possible precursors of C60 fullerene

The AMI calculations of hydrocarbon molecules C₂₀H₁₀ (1) and C₃₀H₁₀ (2) and anions C₂₀H₁₅ ^–4 (3) and C₃₀H₁₅ ^– (4) have been performed with the full energy optimization of the geometric parameters. The chosen topology of the carbon framework of the studied compounds is identical to the topology of the corresponding carbon fragments of C₆₀ fullerene. Analysis of the structure of the frontier orbitals of systems1–4 demonstrated that the tendency of the C₂₀H₁₀ molecule to form sandwich -complexes of the ⁵-type with transition metal atoms is small; however, this tendency is significantly larger than that of C₃₀H₁₀. Moreover, the exclusion of the five-membered cycle of bowlshaped unsaturated hydrocarbon molecules and anions from the conjugated system (as a result of the conversion of five framing C atoms to saturated carbon centers) favors the stabilization of their ⁵-type -complexes with M(C₅H₅) species. The stability of these complexes must approach the stability of classical sandwich complexes of the ferrocene type. The results obtained have been extrapolated to polyhedral C₆₀ and C₇₀ carbon clusters.Translated fromIzvestiya Akademii Nauk. Seriya Khimicheskaya, No. 5, pp. 855–858, May, 1995.This work was financially supported by the Russian Foundation for Basic Research (Projects No. 93-03-4101 and 93-03-18725).