1. Synthesis of 2-ethynyl- and 4,5-diethynyl-1-methylimidazoles

   • M. S. Shvartsberg
   • L. N. Bizhan
   • I. L. Kotlyarevskii

   Brief Communications Pages: 426 - 428

2. Proton magnetic resonance spectra of some vinyl and ethyl derivatives of five-membered N-heterocycles

   • V. K. Voronov
   • E. S. Domnina
   • G. G. Skvortsova

   Brief Communications Pages: 429 - 430

3. Decomposition of gaseous ozone on rubidium ozonide

   • A. B. Tsentsiper
   • M. S. Dobrolyubova

   Brief Communications Pages: 431 - 432

4. Hydrochlorides of methyl iminoesters of cis-and trans-β-ferrocenylacrylic acids and some of their transformations

   • N. S. Nametkin
   • G. A. Shvekhgeimer
   • V. I. Ivanov

   Brief Communications Pages: 433 - 435

5. Preparation of 1,3,5-cycloheptatriene and its homologs by the liquid-phase dehydrobromination of 7,7-dibromonorcaranes

   • O. M. Nefedov
   • É. S. Agavelyan

   Brief Communications Pages: 436 - 437

6. Mass-spectrometric recording of 1H-azirines as two-charged aromatic ions

   • R. G. Kostyanovskii
   • Kh. Khafizov

   Letters to the Editor Pages: 438 - 438

7. Mass spectra of derivatives of dewar and kekule benzenes

   • R. G. Kostyanovskii
   • Kh. Khafizov
   • G. G. Yakobson

   Letters to the Editor Pages: 439 - 440

8. Isomerization of carbocation, formed in the acetolysis of 5-hexenyl-1-¹³C and cyclopentylcarbinyl-¹³C p-nitrobenzenesulfonate

   • T. N. Shatkina
   • A. N. Lovtsova
   • O. A. Reutov

   Letters to the Editor Pages: 441 - 441

9. Presence of two forms in solutions of copper (II) biscomplexes with bidentate α-amino acids

   • V. A. Davankov
   • S. V. Rogozhin
   • A. A. Kurganov

   Letters to the Editor Pages: 442 - 442

10. Study of the diastereoisomerism of organophosphorus compounds by the³¹P-NMR method

    • T. A. Mastryukova
    • A. É. Shipov
    • M. I. Kabachnik

    Letters to the Editor Pages: 443 - 443

11. Monohalocarbenes from haloforms

    • O. M. Nefedov
    • A. I. D'yachenko

    Letters to the Editor Pages: 444 - 444

12. Shift of double bond in butenes on oxides of rare-earth elements at low temperatures

    • Kh. M. Minachev
    • V. K. Nesterov
    • Yu. S. Khodakov

    Letters to the Editor Pages: 445 - 445

13. New method for preparation of 1,2-dithiolan-3-ones

    • T. P. Vasil'eva
    • M. G. Lin'kova
    • I. L. Knunyants

    Letters to the Editor Pages: 446 - 446

14. New reaction of trinitromethane derivatives with cyclic ethers

    • O. P. Shitov
    • S. L. Ioffe
    • S. S. Novikov

    Letters to the Editor Pages: 447 - 447