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1.
L. A. Aslanov V. M. Ionov V. I. Andrianov Z. Sh. Safina A. Yu. Shashkov 《Chemistry of Heterocyclic Compounds》1977,13(12):1299-1303
The crystal and molecular structures of 2,10-diacetoxy-13-thiabicyclo[7.3.1]-cis-tridec-5-ene and 2,9-dichloro-13-thiablcyclo[8.2.1]-cis-tridec-5-ene sulfoxide were established. The conformations of the molecules are such that the unshared pairs of electrons of the sulfur atoms are directed to the carboncarbon double bonds of their molecules. It was observed that there are stereochemical conditions for transannular transformations under the influence of polarized molecules and cations.Translated from Khimiya Geterotsiklicheskikh Soedinenii, No. 12, pp. 1628–1632, December, 1977. 相似文献
2.
The energies of formation of platinum complexes with borohydrides B10H14 and B10H
14
2-
or carboranes B8C2H14 and B8C2H
14
2-
were considered in terms of the structure—thermodynamics model. The thermodynamic stability of these complexes was substantiated.Translated from Koordinatsionnaya Khimiya, Vol. 31, No. 2, 2005, pp. 149–152. Original Russian Text Copyright © 2005 by Ionov, Kuznetsov. 相似文献
3.
Conditions were found, under which an anomalous relationship should be observed in the energies of sequential ionization of molecules ("anomalous" molecules) such that a subsequent potential (In+1) is less than the preceding potential (In). These conditions are a function of the electronic vibrational instability of molecules or their ions upon change in the number of electrons in the system. An interrelationship was found with the previously proposed concept of effective electron—electron attraction in molecular systems.Institute of Physiologically Active Compounds, Russian Academy of Sciences, 142432 Chernogolovka. Translated from Izvestiya Akademii Nauk, Seriya Khimicheskaya, No. 3, pp. 738–741, March, 1992. 相似文献
4.
E. S. Kolodeznyi S. S. Rochas A. S. Kurochkin A. V. Babichev I. I. Novikov A. G. Gladyshev L. Ya. Karachinskii D. V. Denisov Yu. K. Bobretsova A. A. Klimov S. A. Blokhin K. O. Voropaev A. S. Ionov 《Optics and Spectroscopy》2018,125(2):238-242
Results of investigation of 1550 nm range stripe semiconductor lasers fabricated from heterostructures with different designs of the gain medium are presented. It is shown that the proposed designs of the gain medium allow obtaining the effective lasing at high level of total optical losses, comparable with the typical optical losses in the vertical-cavity surface-emitting lasers. The evaluation of modal gain in different types of the gain mediummade it possible to estimate the possible frequencies of the small-signal modulation of vertically emitting lasers and proposed the ways to increase them up to 20 GHz or more. 相似文献
5.
6.
S. I. Levchenkov L. D. Popov I. N. Shcherbakov V. G. Vlasenko A. A. Tsaturyan S. S. Beloborodov A. M. Ionov V. A. Kogan 《Russian Journal of General Chemistry》2014,84(10):1970-1978
Binuclear complexes of copper(II) with 1′-phthalazinylhydrazones of substituted salicylic aldehydes have been prepared and studied. Antiferromagnetic exchange interaction between copper(II) ions has been revealed in all the complexes. Taking advantage of quantum-chemical simulation, we have investigated the influence of the complexes structural isomerism on the character of the exchange interaction between the paramagnetic centers. X-ray absorbance spectroscopy afforded the structural parameters of coordination spheres of copper(II) ions; it has been demonstrated that dimerization occurred via the nitrogen atoms of phthalazine fragments. 相似文献
7.
8.
It is shown that the occurrence of metallic conductivity in polymers is due to their electrification. In particular, the current density depends on the electron work function of metallic electrodes which are in contact with the polymer. 相似文献
9.
Propagation of tube waves in an infinite fluid-filled borehole, generated by a single-force point source placed in the elastic surrounding formation, is analyzed in the long-wave approximation. Integral representations of the precise solution are obtained both for fast and slow formations. An asymptotic analysis of tube-wave propagation in the fluid-filled borehole is performed on the basis of these two integral representations. The complete asymptotic wave field in the borehole fluid for a fast formation consists of P and SV phases and the lowest eigenmode of the Stoneley wave (tube wave). For a slow formation the conical Stoneley wave (Mach wave) is generated. It appears only behind the critical angle defined by the ratio of the S wave velocity in the formation to the low-frequency Stoneley wave velocity and decays weakly with an offset. Asymptotic wave forms are in good agreement with wave forms obtained by straightforward calculations. 相似文献
10.