Mass spectrometric study of the vaporization of N,N′-o-phenylene-bis(salicylideniminate) nickel(II), copper(II), and zinc(II) and N,N′-ethylene-bis(salicylaldiminate) zinc(II) complexes

被引:0
作者
N. V. Tverdova
E. D. Pelevina
A. V. Krasnov
Yu. A. Zhabanov
G. V. Girichev
N. P. Kuzmina
O. V. Kotova
机构
[1] Ivanovo State University of Chemistry and Technology,Department of Chemistry
[2] Moscow State University,undefined
来源
Russian Journal of Physical Chemistry A | 2012年 / 86卷
关键词
Schiff base; ZnO; N; C; H; MN; O; C; H; zinc; copper; nickel; enthalpy of sublimation; vapor composition;
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摘要
The thermodynamics of vaporization of Ni(saloph), Cu(saloph), Zn(saloph), and Zn(salen) complexes are studied by Knudsen effusion method with mass spectrometric control of the vapor composition. It is noted that in the mass spectra of Zn(saloph) and Zn(salen), there are low-intensity peaks corresponding to ions of dimer. The effect of the nature of a metal and a ligand on the behavior of fragmentation of the complexes during their ionization with electrons is discussed. The enthalpies of sublimation, ΔHs○ (T), are calculated by second law of thermodynamics: Ni(saloph) (502–578 K), 163 ± 1 kJ/mol; Cu(saloph) (475–550 K), 162 ± 1 kJ/mol; Zn(saloph) (571–637 K), 176 ± 4 kJ/mol; Zn(salen) (568–634 K), 169 ± 2 kJ/mol.
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页码:816 / 824
页数:8
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