1. 250th anniversary of the Academy of Sciences of the USSR

   Announcement Pages: 225 - 227

2. Exchange interaction in the Feynman formalism of quantum mechanics

   • Sh. N. Gifeisman
   • Yu. E. Perlin

   OriginalPaper Pages: 228 - 233

3. Perturbation of atomic one-electron states by the field of a diatomic molecule

   • G. K. Ivanov

   OriginalPaper Pages: 234 - 238

4. Diffusion theory of the exchange broadening of the ESR spectra of dilute solutions of paramagnetic particles

   • K. M. Salikhov

   OriginalPaper Pages: 239 - 244

5. Effect of exchange by vibrational quanta on the dissociation rate of diatomic molecules

   • N. M. Kuznetsov

   OriginalPaper Pages: 245 - 251

6. Activation of molecular nitrogen on complex formation

   • I. B. Golovanov
   • V. M. Sobolev

   OriginalPaper Pages: 252 - 257

7. Electronic structure and electron donor-acceptor properties of some nitrogen-containing bases and their cations

   • A. A. Krasheninnikov
   • Yu. A. Panteleev

   OriginalPaper Pages: 258 - 261

8. Electron acceptor and donor properties of fragments of hydrogen-bonded complexes of the type RA-H...BR'

   • A. E. Lutskii
   • T. N. Marchenko

   OriginalPaper Pages: 262 - 266

9. Spectroscopic study of the properties of hydrogen bonding of trialkylphosphine oxides with aliphatic alcohols as proton donors in solutions

   • E. V. Ryl'tsev
   • V. G. Koval'
   • Yu. P. Egorov

   OriginalPaper Pages: 267 - 271

10. Equations of the surface-tension isotherms of binary solutions with chemical reactions

    • S. N. Zadumkin
    • Kh. B. Khokonov
    • M. Kh. Ponezhev

    OriginalPaper Pages: 272 - 276

11. On the dissolution mechanism of dispersed silicas

    • V. V. Strelko

    OriginalPaper Pages: 277 - 281

12. Mass-spectrometric investigation of the mechanism of formation of associative ions of n-butyl acetate in strong electrical fields

    • V. G. Golovatyi
    • R. N. Bondarenko
    • M. M. Aleksankin

    OriginalPaper Pages: 282 - 285

13. Calculation of dipole moments of the HD, HT, and DT by double perturbation theory

    • A. V. Gur'yanov
    • T. K. Rebane

    Brief Communications Pages: 286 - 288

14. Calculation of the electron quadrupole moment of the hydrogen molecule by double perturbation theory, using the nonsymmeterized zeroth approximation

    • A. V. Gur'yanov
    • T. K. Rebane

    Brief Communications Pages: 289 - 291

15. Parametrization of a compressive reflection in a secular Roothaan problem

    • A. V. Niukkanen
    • L. A. Gribov

    Brief Communications Pages: 292 - 294

16. The recombination kinetics of active centers

    • P. A. Vrunov
    • V. A. Kaminskii
    • S. F. Timashev

    Brief Communications Pages: 295 - 298

17. Second ionization potentials and electron affinities of complex conjugated systems

    • E. Ya. Bolycheva

    Brief Communications Pages: 299 - 301

18. Stoichiometric compositions of a complex chemical system

    • I. I. Kusel'man

    Brief Communications Pages: 302 - 304

19. Activation energy of orientational relaxation of nitrate ion and electrical conductivity in certain fused nitrate-chloride mixtures

    • S. A. Kirillov
    • B. M. Voronin

    Brief Communications Pages: 305 - 307

20. Electronic properties of the sulfilimine grouping

    • Yu. A. Nuzhdina
    • Yu. P. Egorov
    • L. N. Markovskii

    Brief Communications Pages: 308 - 310

21. Structure of phosphorylated amides and the properties of hydrogen bonds

    • Yu. A. Nuzhdina
    • G. I. Derkach
    • Yu. P. Egorov

    Brief Communications Pages: 311 - 313

22. Investigation by the PMR method of the hydrogen bond and the kinetics of rapid proton exchange between substituted thiophenols and acetic acid

    • V. K. Pogorelyi
    • V. P. Prokopenko
    • I. P. Gragerov

    Brief Communications Pages: 314 - 317

23. Investigation by the NMR method of the hydrogen bond in autoassociates of ethers and esters of chlorosubstituted hydrocarbons

    • I. I. Kukhtenko
    • B. V. Chizhov
    • V. K. Pogorelyi

    Brief Communications Pages: 318 - 321

24. Unstable molecular complexes of bromine with compounds containing a heteroatom, and with cyclohexene

    • Ya. M. Kimel'fel'd
    • A. B. Mostovoi
    • Ya. Z. Volkov

    Brief Communications Pages: 322 - 324

25. Identification of the basic final solid products of the photolysis of potassium ferrioxalate

    • A. A. Medvinskii
    • G. N. Belozerskii
    • V. V. Boldyrev

    Brief Communications Pages: 325 - 327

26. Use of probe molecules for the investigation of the structure of liquid n-paraffins

    • I. A. Ar'ev

    Brief Communications Pages: 328 - 330

27. Indicator-electrode-reactions method in polarography

    • N. A. Gordienko

    Brief Communications Pages: 331 - 332

28. Self-diffusion and nuclear spin-lattice relaxation time in aqueous solutions of sodium carboxymethylcellulose

    • A. I. Toryanik
    • V. G. Pogrebnyak
    • N. G. Malyuk

    Brief Communications Pages: 333 - 334

29. Effect of the acceptor properties of molecules on their catalytic ammonolysis rate

    • S. G. Gagarin
    • I. K. Kolchin

    Brief Communications Pages: 335 - 336