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1.
Yu. P. Kudryavtsev S. E. Evsyukov M. B. Guseva V. G. Babaev V. V. Khvostov 《Russian Chemical Bulletin》1993,42(3):399-413
The history of the discovery of carbyne, the chemical and physical methods used to obtain it, the analysis of its structure, and some of its properties are briefly considered. The prospects for its practical applications are discussedThis publication is based on a number of works on carbyne submitted for the Russian State Prize in the field of science and technology in 1993; performed at the A. N. Nesmeyanov Institute of Organoelement Compounds, Russian Academy of Sciences and the M. V. Lomonosov Moscow State University.Translated fromIzvestiya Akademii Nauk. Seriya Khimicheskaya, No. 3, pp. 450–463, March, 1993. 相似文献
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O. A. Streletskii I. P. Ivanenko V. V. Khvostov N. F. Savchenko O. Yu. Nishchak A. F. Aleksandrov 《Physics of the Solid State》2016,58(10):2119-2125
This paper presents the results of investigations of three types of carbon structures synthesized by different methods, such as arc discharge plasma enhanced chemical vapor deposition of carbon in a magnetic field, chemical dehydrohalogenation of the poly(vinyl chloride)/poly(vinylidene chloride) precursor, and pulsed plasma ion assisted deposition. It has been found that the samples prepared by different methods have a common feature, i.e., the presence of three-dimensional clusters based on sp2- or sp3-bonds surrounded by quasi-one-dimensional carbon chains. It has been shown that the structure of carbon materials changes depending on the synthesis conditions. 相似文献
4.
A. I. Sizov T. M. Zvukova A. V. Khvostov A. A. Gorkovskii Z. A. Starikova B. M. Bulychev 《Russian Chemical Bulletin》2005,54(11):2496-2501
A procedure was developed for the synthesis of trinuclear cyclic (ZrIII)2—Al hydrides [(Cp2Zr)2(μ-H)](μ-H)2AlX2 (X = Cl (1a) or Br (1b)). These complexes were prepared in 60–65% yields by the reaction of Cp2ZrX2 with LiAlH4 in the presence of CoBr2 and tolane. The structures of complexes 1a and 1b and iodide 1c (X = I) were studied by NMR spectroscopy in solvents of different basicities (toluene, THF, and pyridine). Complex 1a is unsolvated and monomeric in all solvents; complex 1b, in toluene and THF; complex 1c, in toluene only. At room temperature, complex 1a does not catalyze hydrogenation of hex-1-ene and does not react with tolane, but reacts with the latter at high temperature
to give bis(η5-cyclopentadienyl)-2,3,4,5-tetraphenylzirconacyclopentadiene. The reaction of equivalent amounts of complex 1a and HCl produces the [(Cp2Zr)2(μ-Cl)](μ-H)2AlCl2 complex. The structure of the latter was established by X-ray diffraction.
Published in Russian in Izvestiya Akademii Nauk. Seriya Khimicheskaya, No. 11, pp. 2418–2423, November, 2005. 相似文献
5.
Yu. G. Korobova V. G. Babaev V. V. Khvostov M. B. Guseva 《Moscow University Physics Bulletin》2008,63(1):33-38
A complex investigation of the structure and emission characteristics of linear-chain carbon is accomplished. This material is demonstrated to be stable at high temperature (700°C), and the thermal emission is shown to be governed by the Schottky mechanism with the material characteristics reaching record-breaking values: an emission threshold of 800 V/mm and a thermoionic work function of 0.43 eV. These values are found to arise during sp 1 carbon crystallization and vanish after its graphitization. The very low value of the work function of linear-chain carbon is theoretically substantiated. 相似文献
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S. L. Podvalny A. M. Belyanin S. G. Tikhomirov A. A. Khvostov 《Bulletin of the Russian Academy of Sciences: Physics》2016,80(9):1150-1151
Aspects of using the method of moments to simulate processes of the synthesis of polymers by means of gel chromatography are considered. Problems of modeling multimodal molecular weight distributions and their evolution as a function of conversion are discussed. 相似文献
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V. V. Khvostov M. B. Guseva A. F. Aleksandrov A. M. Tagachenkov O. A. Streletskii 《Bulletin of the Lebedev Physics Institute》2012,39(2):57-63
The structure of amorphous linear-chain carbon (LCC) during the structure formation under conditions of vacuum annealing was
studied by electron diffraction and Raman spectroscopy methods. It was shown that the determining factor of lowering the work
function of the LCC coating is the formation of nanoclusters of mutually misoriented short carbon chains. 相似文献
8.
Avent AG Antolini F Hitchcock PB Khvostov AV Lappert MF Protchenko AV 《Dalton transactions (Cambridge, England : 2003)》2006,(7):919-927
Reactions between sodium amides Na[N(SiMe3)R1] [R1 = SiMe3 (1), SiMe2Ph (2) or But (3)] and cyanoalkanes RCN (R = Ad or But) were investigated. In each case the nitrile adduct [Na{mu-N(SiMe3)2}(NCR)]2 [R = Ad (1a) or But (1b)], trans-[Na{mu-N(SiMe3)(SiMe2Ph)}(NCR)]2 [R = Ad (2a) or But (2b)], [(Na{mu-N(SiMe3)But})3(NCAd)3] (3a) or [(Na{mu-N(SiMe3)But})3(NCBut)n] [n = 3 (3b) or 2 (3c)] was isolated. The reaction of complexes 3a or 3b with benzene afforded the ketimido complex [Na{mu-N=C(Ad)(Ph)}]6.2C6H6 (4a) or [Na{mu-N=C(But)(Ph)}]6 (4b); the former was also prepared in more conventional fashion from NaPh and AdCN. The synthesis and structure of an analogue of complex 1a, [Li{mu-N(SiMe3)2}(NCAd)]2 (5a), is also presented. The compounds 1a, 1b, 2a, 2b, 3, 3b, 4a, 4b and 5a were characterised by X-ray diffraction. 相似文献
9.
Avent AG Hitchcock PB Khvostov AV Lappert MF Protchenko AV 《Dalton transactions (Cambridge, England : 2003)》2004,(15):2272-2280
The synthesis and characterisation of novel Li and Yb complexes is reported, in which the monoanionic beta-diketiminato ligand has been (i) reduced (SET or 2 [times] SET), (ii) deprotonated, or (iii) C-N bond-cleaved. Reduction of the lithium beta-diketiminate Li(L(R,R'))[L(R,R')= N(SiMe(3))C(R)CHC(R')N(SiMe(3))] with Li metal gave the dilithium derivative [Li(tmen)(mu-L(R,R'))Li(OEt(2))](R = R'= Ph; or, R = Ph, R[prime or minute]= Bu(t)). When excess of Li was used the dimeric trilithium [small beta]-diketiminate [Li(3)(L(R,R[prime or minute]))(tmen)](2)(, R = R'= C(6)H(4)Bu(t)-4 = Ar) was obtained. Similar reduction of [Yb(L(R,R'))(2)Cl] gave [Yb[(mu-L(R,R'))Li(thf)](2)](, R = R[prime or minute]= Ph; or, R = R'= C(6)H(4)Ph-4 = Dph). Use of the Yb-naphthalene complex instead of Li in the reaction with [Yb(L(Ph,Ph))(2)] led to the polynuclear Yb clusters [Yb(3)(L(Ph,Ph))(3)(thf)], [Yb(3)(L(Ph,Ph))(2)(dme)(2)], or [Yb(5)(L(Ph,Ph))(L(1))(L(2))(L(3))(thf)(4)] [L(1)= N(SiMe(3))C(Ph)CHC(Ph)N(SiMe(2)CH(2)), L(2)= NC(Ph)CHC(Ph)H, L(3)= N(SiMe(2)CH(2))] depending on the reaction conditions and stoichiometry. The structures of the crystalline complexes 4, 6x21/2(hexane), 5(C(6)D(6)), and have been determined by X-ray crystallography (and have been published). 相似文献
10.
V. K. Belsky A. V. Khvostov Yu. K. Gun'ko B. M. Bulychev S. Ya. Knyazhanskii 《Russian Chemical Bulletin》1999,48(12):2285-2289
1,4,5,6,7,10,11,12-Octamethyltricyclo[7.3.0.03,7]dodeca-3,5,9,11-tetraene was obtained as a by-product in the synthesis of (C5Me5)2CeCl from CeCl3 and NaC5Me5. The complex of 1,1′,3,3′-tetrakis(tert-butyl)-1,1′-dihydrofulvalene with I3
− was obtained as the major product in the reaction of YbI3 with 1,3-But
2C5H3Na. The structures of the title compounds were established by X-ray diffraction analysis.
Translated fromIzvestiya Akademii Nauk. Seriya Khimicheskaya, No. 12, pp. 2310–2314, December, 1999. 相似文献