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排序方式: 共有104条查询结果,搜索用时 46 毫秒
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Gorbunova T. I. Maiorova A. V. Kulikova T. V. Pervova M. G. Safronov A. P. 《Russian Journal of General Chemistry》2021,91(8):1540-1545
Russian Journal of General Chemistry - The degradation of hydroxy derivatives synthesized from individual di-, tri-, tetra-, and pentachlorinated biphenyls as typical representatives of commercial... 相似文献
3.
E. I. Andreikov I. S. Amosova Yu. A. Dikovinkina O. V. Krasnikova M. G. Pervova 《Russian Journal of Applied Chemistry》2012,85(1):89-97
Pyrolysis of polystyrene in the medium of coal tar pitch and of pitch prepared from ethylene production tar was performed
in the temperature range 360–420°C at atmospheric pressure. 相似文献
4.
G. P. Vishnevskaya E. N. Frolova I. V. Ovchinnikov I. G. Pervova Z. G. Rezinskikh 《Russian Journal of Physical Chemistry A, Focus on Chemistry》2010,84(8):1388-1394
For the first time, the EPR method was used to reveal and study the special features of spin-transition processes between
high-spin and low-spin iron(III) complexes with hetarylformazans immobilized on an ion-exchange polymer. An analysis of completely
reversible temperature dependences of EPR line positions, widths, and integral intensities in the spectra of high-spin and
low-spin complexes allowed four temperature intervals to be identified. These intervals corresponded to preparative periods
of spin-transition processes (450–275 K, intervals I and II), their appearance (275–230 K, interval III), and occurrence (230–100
K, interval IV). Local concentrations and spin exchange frequencies in clusters were estimated. Effects related to high-spin
complex EPR signal shifts during temperature changes and to the duration of sample storage were revealed. High-spin complexes
were found to be very sensitive to external actions, as distinct from very stable low-spin complexes. Experimental EPR observations
obtained for ion-exchange polymer satisfied the concept of the nucleation and growth of domains in the spin-transition process. 相似文献
5.
I. G. Pervova A. V. Zaĭdman I. N. Lipunov P. A. Slepukhin 《Crystallography Reports》2010,55(2):237-239
1,5-Bis(2-Formylphenoxy)pentane was studied by X-ray diffraction. There are two crystallographically independent molecules
with similar geometric parameters in the asymmetric unit of the crystal structure. The molecules occupy special positions
on a rotation axis. 相似文献
6.
S. A. Nalet´ko M. G. Pervova M. I. Kodess M. S. Toporova T. I. Gorbunova A. Ya. Zapevalov V. I. Saloutin 《Russian Chemical Bulletin》2017,66(6):1011-1017
The CoCl2-catalyzed reactions of fluorinated 1,2-oxi- and thiiranes with acyl chlorides were studied. It was found that a regioselective heterocycle opening reaction resulted in two isomers having normal and abnormal structure in a ratio predetermined by the substituents in both the starting heterocycles and acyl chlorides. 相似文献
7.
Z. G. Rezinskikh I. G. Pervova G. N. Lipunova T. I. Maslakova Yu. A. Gorbatenko I. N. Lipunov G. I. Sigeikin 《Russian Journal of Coordination Chemistry》2008,34(9):659-663
Novel mono-and binuclear metal complexes of Ni(II) based on 1-aryl-3-aryl(alkyl)-5-(benzothiazole-2-yl)formazanes were synthesized and their structures were studied by the electronic and IR spectroscopy, mass spectrometry and megnetochemical methods. 相似文献
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P. A. Slepukhin I. G. Pervova Z. G. Rezinskikh G. N. Lipunova Yu. A. Gorbatenko I. N. Lipunov 《Crystallography Reports》2008,53(1):88-91
The crystal structure of 1-phenyl-3-isopropyl-5-(benzothiazol-2-yl)formazan is investigated using X-ray diffraction. The compound crystallizes in the form of two crystallographically independent molecules (A and B) in identical conformations that are stabilized by intermolecular hydrogen bonds. The intermolecular hydrogen bonds N-H…N (N…N, 2.892 and 2.939 Å) link molecules into AB dimers. Both molecules have a flattened structure, except for the isopropyl fragment. The bonds in the formazan chains are delocalized. Molecules A and B have close geometric characteristics. 相似文献