Conclusions
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1.
The introduction of vanadium and molybdenum oxides into MgO gives rise to the formation of acid centers which bond with adsorbed methylpyrazine and 4-methylpyrimidine through the ring nitrogen atom.
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2.
Increasing the temperature changes the state of these active centers and thereby increases the strength of coordinational bonding of the methylpyrazine and 4-methylpyrimidine with the surface of the vanadium and molybdenum oxides on MgO. Similar effects are not observed in the interaction of these diazines with the γ-Al2O3 surface.
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3.
The interaction of oxygen with methylpyrazine and 4-methylpyrimidine adsorbed on vanadium and molybdenum oxides supported by MgO gives rise to the formation of surface heterocyclic carbonyl compounds.
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Translated from Izvestiya Akademii Nauk SSSR, Seriya Khimicheskaya, No. 11, pp. 2468–2473, November, 1977.
The authors would like to thank M. Ya. Kushnerev for having carried out the x-ray analyses.
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Iovel', I.G., Kadushin, A.A., Shimanskaya, M.V. et al. IR Spectroscopy study of the interaction of methylpyrazine and 4-methylpyrimidine with vanadium and molybdenum oxides supported on magnesium oxide. Russ Chem Bull 26, 2287–2292 (1977). https://doi.org/10.1007/BF00958712
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DOI: https://doi.org/10.1007/BF00958712