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1.
Savel'eva Z. A. Popov S. A. Glinskaya L. A. Klevtsova R. F. Ikorskii V. N. Boguslavskii E. G. Tkachev A. V. Larionov S. V. 《Russian Journal of Coordination Chemistry》2004,30(2):115-123
Methyl 3-[(3,5-dimethylpyrazole-1-carbothioyl)-amino]propionate (L1) and the optically active derivative of natural monoterpene (+)-3-carene, (3bS,4aR)-3-[(3,4,4-trimethyl-3b,4,4a,5-tetrahydro-cyclopropa[3,4]cyclopenta[1,2-c]pyrazole-1-carbothioyl)-amino]propionate (L2), are synthesized. The paramagnetic CuL1Cl2 (I) and [Cu2L2
2Cl4] (II) complexes are obtained. According to the X-ray diffraction data, in mononuclear complex I, the L1 molecule performs a bidentate-cyclic function due to the coordination of the S atom of the C=S group and the N atom of the pyrazole cycle. The CuCl2NS coordination polyhedron is a distorted tetrahedron. Two molecules of complex I form an associate due to weak Cu···S interactions. Compound II is binuclear due to the bridging function of two Cl- ions, and analogous functions of the L1 and L2 ligands. The coordination polyhedron in complex II is CuCl3NS. The eff values for compounds I and II are equal to 1.81 and 1.79 B, respectively, and are constant in the interval from 78 to 300 K, indicating that noticeable exchange interactions between unpaired electrons of the Cu2+ ions are absent. The EPR spectra of the complexes in the solid phase are examined. 相似文献
2.
N. F. Yudanov E. G. Boguslavskii I. I. Yakovlev S. P. Gabudar 《Russian Chemical Bulletin》1988,37(2):200-203
1. | A method has been developed for the intercalation of solid substances from solutions in organic solvents into graphite fluoride C2Fx. |
2. | Molecules of inserted paramagnetic copper complexes and nitroxyl radicals assume oriented positions between the structural layers in graphite fluoride. |
3. | The planes of molecules of bis-chelate Cu(II) complexes with acetylacetone, o-hydroxyquinoline, and phenylsalicylaldimine were determined to lie parallel to the C2Fx planes. |
4. | A method has also been suggested for the preparation of samples from C2Fx·yA compounds with a higher degree of texturizing (more nearly complete orientation) than can be achieved by pelletizing. |
3.
Lavrenova L. G. Ikorskii V. N. Sheludyakova L. A. Naumov D. Yu. Boguslavskii E. G. 《Russian Journal of Coordination Chemistry》2004,30(6):413-419
New complexes of Co(II), Ni(II), and Cu(II) with 1-(4-hydroxyphenyl)-1H-1,2,4-triazole (L) of the composition ML2(H2O)2(NO3)2 · nH2O (M = Co(II), n = 3; M = Ni(II), n = 0; M = Cu(II), n = 0) were synthesized and studied by photoelectron and IR spectroscopy, magnetochemistry, thermogravimetry, and X-ray powder diffraction analysis. The type of eff(T) relationship suggests that paramagnetic centers in the Co(II) chloride and Cu(II) nitrate and bromide complexes are involved in antiferromagnetic exchange interactions. The exchange energy values were estimated by the molecular field method. 相似文献
4.
T. E. Kokina A. V. Tkachev L. I. Myachina S. N. Bizyaev L. A. Sheludyakova L. A. Glinskaya I. V. Korol’kov E. G. Boguslavskii S. V. Larionov 《Russian Journal of General Chemistry》2013,83(2):336-347
Coordination compounds Pd2(H2L2)Cl4 (I), Cu2(H2L2)Cl4 (II), Pd2(H2L3)Cl4 (III), and Cu2(H2L3)Cl4 (IV), where H2L2 and H2L3 are chiral bis-α-aminooxime ligands consisting of (+)-3-carene or (+)-limonene fragments and 4,4′-methylenedianiline linker, were synthesized and examined by NMR, ESR, and IR spectroscopy. The structure of [Cu(i-PrOH)CL2(μ-H2L3)CuCL2·H2O] (V) was determined by X-ray analysis. 相似文献
5.
A. A. Ryadun V. A. Nadolinny A. A. Pavlyuk S. F. Solodovnikov E. G. Boguslavskii 《Journal of Structural Chemistry》2013,54(1):59-64
An EPR study of Li2?2x Zn2+x (MoO4)3 crystals activated by copper ions shows that they occupy the M2 site, one of the three possible sites of both lithium and zinc. In the EPR spectra of Cu2+ copper a broadening of HFS lines and a nonequidistant splitting between them, which are unusual for the orientation H‖g zz , A zz , are observed. In this work possible reasons for such a broadening of HFS lines from copper ions are analyzed: a distortion of the oxygen octahedron due to the introduction of copper ions, second order perturbation theory corrections, superposition of HFS from 63Cu and 65Cu isotopes, and the effect of the charge redistribution in the oxygen octahedron because the cation vacancy providing charge compensation can be located at different distances from the copper ion. It is shown that the first three reasons do not explain the features observed in the EPR spectra. In the case of cation vacancies located in the M3 site and remote at different distances from the copper ion, the charge redistribution in the oxygen octahedron of copper should occur along with the dispersion of HFS parameters and the g-factor. The studies performed in X and Q bands confirm this assumption. The width of HFS lines from copper ions in the EPR spectra measured in the Q band is three times more compared to that measured in the X band. 相似文献
6.
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8.
E. V. Lider E. V. Peresypkina L. G. Lavrenova O. L. Krivenko E. G. Boguslavskii A. I. Smolentsev L. A. Sheludyakova S. F. Vasilevskii 《Russian Journal of Coordination Chemistry》2009,35(6):433-444
New complexes of copper(II) nitrate, chloride, tetrafluoroborate, perchlorate, and perrhenate with bis(4-iodo-3,5-dimethylpyrazol-1-yl)methane (L) were obtained. The molecular and crystal structures of [CuL(H2O)(NO3)2] · (CH3)2CO, [CuL2(H2O)][CuL2Cl][CuCl4], [CuL2](BF4)2 · (CH3)2CO, and [CuL2(H2O)](ClO4)2 · (CH3)2CO were determined by X-ray diffraction analysis. In all the complexes, L was found to serve as a chelating bidentate ligand through the N2 and N2′ atoms of its pyrazole rings to form a six-membered chelate ring. 相似文献
9.
G. S. Berezin I. V. Boguslavskii N. Grigalashvili V. I. Davkov K. I. Davkov I. A. Zhukov A. I. Zinchenko V. D. Kekelidze G. D. Kekelidze V. M. Lysan V. V. Myalkovskiy V. D. Peshekhonov N. D. Topilin A. V. Shabunov V. D. Cholakov 《Physics of Particles and Nuclei Letters》2012,9(2):163-167
The development of the NICA heavy ion collider, which is now under way, assumes the development of a Multipurpose Detector (MPD), including an end-cap tracker (EC) (which can be a wheel-type tracker based on thin-wall drift tubes (straws) similar to the inner detector of the transition radiation tracker (TRT) in the ATLAS experiment). The identical front and back tracker modules mounted behind the TPC are to ensure the detection of Au-Au ion collision products in the pseudorapidity range from 1.4 to 2.1 with good track parameters of reconstructed events. Each module will contain 60 circular straw planes and maximum straw occupancy will be no higher than 0.2 particle per collision. The NICA EC is substantially different from its analogue and requires a certain amount of R&D. The first results from applying new technology to make a full-scale prototype of the circular EC detector for NICA are presented. 相似文献
10.