Mass spectrometric study of the overheated vapor over Ni(II), Cu(II), and Zn(II) N,N′-ethylenebis(acetylacetoniminato) complexes |
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Authors: | G V Girichev N V Tverdova N P Kuz’mina A O Simakov and O V Kotova |
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Institution: | (1) Institute of Chemistry, Jan Kochanowski University, Swietokrzyska 15G, 25-460 Kielce, Poland;(2) Faculty of Chemistry, Adam Mickiewicz University, Grunwaldzka 6, 60-780 Poznan, Poland |
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Abstract: | A mass spectrometric study of the overheated vapor over the complexes Ni(acacen), Cu(acacen), and Zn(acacen) (H2acacen = N,N′-ethylenebis(acetylacetonimine)) has been carried out in the temperature range of 180–760°C. Irrespective of the degree of
overheating, the vapor phases over all of these compounds contain no ions heavier than the molecular ion MO2N2C12H18]+. The existence of molecular ions in the overheated vapor in the double-chamber two-temperature effusion cell is evidence
of the high thermal stability of the complexes. The onset temperature of the thermal decomposition of Ni(acacen), Cu(acacen),
and Zn(acacen) is 690, 610, and 560°C, respectively. The way of fragmentation of the chelates under electron impact ionization
depends on the nature of the metal. |
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