IR spectra of selenophenopyrylium salts

On the basis of the IR spectra of 16 alkyl-substituted selenopheno[2,3-c]- and selenopheno-[3,2-c]pyrylium salts and a model calculation of the frequencies and the forms of their normal vibrations, an assignment of the frequencies of the skeletal vibrations of the heterocycles is put forward.Translated from Khimiya Geterotsiklicheskikh Soedinenii, No. 11, pp. 1495–1497, November, 1973.     

Fluorosulfonyl-containing heterocyclic compounds

Hexafluoroisobutenylidene sulfate is a sulfotrioxidizing agent with respect to various olefins; methylenemethionic acid is formed in the case of ethylene, while the corresponding-sulfones are formed in the case of tetrafluoroethylene and vinylidene fluoride. 2,2-Difluoro-2-hydroxy-ethanesulfonic acid sultone is characterized by a capacity for anionotropic transformations; a number of sulfoacetic acid derivatives were obtained on the basis of this sultone.See [1] for communication III.Translated from Khimiya Geterotsiklicheskikh Soedinenii, No. 2, pp. 178–182, February, 1973.     

Influencing parameters in time resolved picosecond spectroscopy and a new light gate method

We show that the open period of a CS₂ light gate, triggered by a picosecond optical pulse, depends on the optical pathlength through the CS₂. An alternative to the light gate is suggested for time resolved spectroscopy. The working principle is based on scattering induced in CS₂. We have found that the broadband emission from H₂O or D₂O excited by a 5300 Å picosecond pulse is also of picosecond duration, but the blue part is delayed with respect to the red. From this delay time the lifetime of the ground state vibrational levels may be measured directly.     

Choice of preferred stationary phases for gas chromatography. Part II

Summary The regularities of changes of the polarity factors with the composition of mixed stationary phases are discussed. Values of the polarity factors of active solids, partitioning liquids and also colloidal stationary phases are compared. Part I: ref. [1].     

p-Ferrocenyltriphenylcarbonium ions

Conclusions The reactions of the tetraphenylborates of some phenylogs of -ferrocenylcarbonium ions with piperidine were studied.Translated from Izvestiya Akademii Nauk SSSR, Seriya Khimicheskaya, No. 9, pp. 2175–2177, September, 1978.