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31.
Chotima R Dale T Green M Hey TW McMullin CL Nunns A Orpen AG Shishkov IV Wass DF Wingad RL 《Dalton transactions (Cambridge, England : 2003)》2011,40(19):5316-5323
Reaction of [Pd(PPh(3))(4)] with 1,1-dichloro-2,3-diarylcyclopropenes gives complexes of the type cis-[PdCl(2)(PPh(3))(C(3)(Ar)(2))] (Ar = Ph 5, Mes 6). Reaction of [Pd(dba)(2)] with 1,1-dichloro-2,3-diarylcyclopropenes in benzene gave the corresponding binuclear palladium complexes trans-[PdCl(2)(C(3)(Ar)(2))](2) (Ar = Ph 7, p-(OMe)C(6)H(4)8, p-(F)C(6)H(4)9). Alternatively, when the reactions were performed in acetonitrile, the complexes trans-[PdCl(2)(NCMe)(C(3)(Ar)(2))] (Ar = Ph 10, p-(OMe)C(6)H(4)11 and p-(F)C(6)H(4)) 12) were isolated. Addition of phosphine ligands to the binuclear palladium complex 7 or acetonitrile adducts 11 and 12 gave complexes of the type cis-[PdCl(2)(PR(3))(C(3)(Ar)(2))] (Ar = Ph, R = Cy 13, Ar = p-(OMe)C(6)H(4), R = Ph 14, Ar = p-(F)C(6)H(4), R = Ph 15). Crystal structures of complexes 6·3.25CHCl(3), 10, 11·H(2)O and 12-15 are reported. DFT calculations of complexes 10-12 indicate the barrier to rotation about the carbene-palladium bond is very low, suggesting limited double bond character in these species. Complexes 5-9 were tested for catalytic activity in C-C coupling (Mizoroki-Heck, Suzuki-Miyaura and, for the first time, Stille reactions) and C-N coupling (Buchwald-Hartwig amination) showing excellent conversion with moderate to high selectivity. 相似文献
32.
A. E. Shishkov 《Journal of Mathematical Sciences》1999,97(3):4066-4084
The paper deals with localization properties of solutions to the Cauchy problem with the initial data u0(x) ∈ L2(ℝn) for a wide class of equations in the divergence form. This class contains, e.g., the following equation:
, Restrictions are obtained, sharp in a sense, on the behavior of the function
ensuring the instantaneous compactification of the support of an arbitrary energy solution to the problem as well as the
compactification of the support after a finite waiting-time.
Translated from Trudy Seminara imeni l. G. Petrovskogo, No. 20, pp. 121–154, 1997. 相似文献
33.
Ivailo Shishkov 《Set-Valued Analysis》2002,10(1):79-87
Every lower semi-continuous closed-and-convex valued mapping : X2
Y
where X is a collectionwise normal and countably paracompact space and Y is a reflexive Banach space can be extended to the Dieudonné completion (X) of X. Generalizations and applications to the theory of selections of set-valued mappings are presented. 相似文献
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35.
Nekipelova T. D. Kurkovskaya L. N. Levina I. I. Shishkov V. S. Kuzmin V. A. 《Russian Chemical Bulletin》2001,50(4):673-677
Steady-state photolysis products of 6- and 8-substituted 2,2,4-trimethyl-1,2-dihydroquinolines in water and lower alcohols were identified by 1H NMR. In the case of electron-donor substituents, the solvent molecule is added to the double bond of the heterocycle affording the corresponding 4-hydroxy- or 4-alkoxytetrahydroquinolines. Nitro-substituted dihydroquinolines are photostable. The addition of EtOH and PrnOH occurs only in the presence of water to give a mixture of alkoxy- and hydroxy-adducts. A reaction scheme is suggested. 相似文献
36.
Eliovich Y. A. Blagov A. E. Ovchinnikova E. N. Kozlovskaya K. A. Targonskii A. V. Pisarevsky Yu. V. Shishkov V. A. Mololkin A. A. Kovalchuk M. V. 《Crystallography Reports》2022,67(7):1061-1067
Crystallography Reports - When carrying out experiments on the P23 beamline of the Petra III synchrotron source (Hamburg, Germany), high efficiency of X-ray acoustic longitudinal resonators for... 相似文献
37.
Buzmakov A. V. Asadchikov V. E. Zolotov D. A. Roshchin B. S. Dymshits Yu. M. Shishkov V. A. Chukalina M. V. Ingacheva A. S. Ichalova D. E. Krivonosov Yu. S. Dyachkova I. G. Balzer M. Castele M. Chilingaryan S. Kopmann A. 《Crystallography Reports》2018,63(6):1057-1061
Crystallography Reports - The design of a new automatic X-ray microtomograph is described. The parameters of optical schemes and X-ray detectors in use are presented. Methods for automating... 相似文献
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Nonthermal glow excited in molybdenum plates and films as a result of temperature stresses arising under the action of laser
pulses is investigated. A relation between the glow excitation threshold and the sample thickness is established. A possible
mechanism of nonthermal glow is discussed. 相似文献