Dependence of computed copolymer reactivity ratios on the calculation method. I. Effect of experimental setup

Five calculation methods for estimating reactivity ratios are compared. Two of these methods are only valid at low conversion, two methods are assumed to be valid up to high conversion, and the fifth method is the integrated form of the copolymer equation. Data were simulated for selected couples of r-values and two conversion levels. The data were randomly disturbed by normal error with mean zero. As (the) monomer feed ratio(s) will be drifting during the course of reaction, the influence of an approximated monomer feed ratio on the r-values calculated was also examined. When conversion is low, all methods give estimates with low precision. High conversion results in larger precision, however, for several methods bias appears. For calculation methods that need information about an approximated monomer feed ratio, the influence of this approximation appears to be rather important especially if the r-values are dissimilar or conversion is high.     

Reaction of fluoroole fins with chromyl chloride

Conclusions The reactions of chromyl chloride with various fluoroolefins were investigated. The character of the process does not agree with the mechanism suggested for the reaction of chromyl chloride with olefins not containing halogen atoms at the double bond.Translated from Izvestiya Akademii Nauk SSSR, Seriya Khimicheskaya, No. 2, pp. 379–383, February, 1970.     

Use of the dielectric sphere model for the calculation of the effect of a solvent on the kinetics of chemical reactions with charge transer. Communication 1. Energy of reorganization of a polar medium

Conclusions The energy of the reorganization of the solvent in charge transfer reactions was calculated for the dielectric sphere model using the precise solution of the corresponding electrostatic problem. The numerical results are in good agreement with the previously obtained approximate analytic equation.Translated from Izvestiya Akademii Nauk SSSR, Seriya Khimicheskaya, No. 3, pp. 613–621, March, 1985.     

NMR spectra of the perfluoro-2-methallyl cation

Conclusions This is the first report of the preparation and¹⁹F and¹³C NMR spectral characterization of the perfluoro-2-methallylic cation.Translated from Izvestiya Akademii Nauk SSSR, Seriya Khimicheskaya, No. 12, pp. 2811–2813, December, 1984.     

Electrochemical synthesis of mono- and bisperfluoroalkanesulfonyl fluorides

Translated from Izvestiya Akademii Nauk SSSR, Seriya Khimicheskaya, No. 10, pp. 2448–2449, October, 1990.