Negative-ion mass spectra of heteroorganic compounds of group IV

Conclusions The dissociative resonance capture of electrons by the molecules of heteroorganic compounds of group IV was studied. It was shown that a new resonance state is observed with the introduction of a vinyl substituent. The nonadditive increase in the relative cross section for the formation of the negative ion with increase in the number of vinyl substituents is due to the stabilization of the molecule negative ion by * -* interaction.Translated from Izvestiya Akademii Nauk SSSR, Seriya Khimicheskaya, No. 3, pp. 566–571, March, 1986.     

Nuclear quadrupole resonance in heteroorganic compounds of group III

Theoretical and Experimental Chemistry -     

Possibilities of multinuclear NMR in the chemistry of heteroorganic compounds

Results of multinuclear NMR studies of some heteroorganic compounds have been presented.According to a report at the conference «Current problems of organometallic chemistry» (May 8–13,1994, Moscow).Translated fromIzvestiya Akademii Nauk. Seriya Khimicheskaya, No. 4, pp. 614–616, April, 1994.     

Proton magnetic resonance spectra of certain heteroorganic compounds of silicon and germanium

Conclusions A comparison of the PMR spectra of a number of saturated and unsaturated organic compounds of silicon and germanium shows that in the case of unsaturated compounds, an appreciable role is played by effects of d–p conjugation, which are stronger for silicon compounds.Translated from Izvestiya Akademii Nauk SSSR, Seriya Khimicheskaya, No. 7, pp. 1312–1313, July, 1964     

13C NMR spectroscopy of tautomeric conversions in imidazole compounds

A study has been made of¹³C NMR spectra of several series of imidazoles and their salts in solution and in the solid state. It has been shown that in compounds containing a pyridine ring, prototropic tautomerism on the NMR time scale may be retarded. The possible mechanism of these processes is discussed.V. I. Vernadskii Institute of Geochemistry and Analytical Chemistry, Russian Academy of Sciences, 11795 Moscow. Torino University, Italy. Translated from Izvestiya Akademii Nauk, Seriya Khimicheskaya, No. 2, pp. 299–308, February, 1992.