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71.
A.V Safronova N.E Stolyarova I.K Grigorieva I.P Malysheva G.V Basova G.K Fukin Yu.A Kurskii S.Ya Khorshev G.A Abakumov 《Journal of organometallic chemistry》2004,689(7):1127-1130
The novel organosilicon, -germanium and -tin-containing carbene complexes of tungsten of the type Ph3E-CHWCl2(OBut)2 (E=Si, Ge, Sn) have been prepared by the reaction of heteroelement-containing carbene complexes of tungsten Ph3E-CW(OBut)3 (E=Si, Ge, Sn) with hydrogen chloride. The tin-containing carbene complex was identified in solution by 1H NMR spectroscopy. Silicon- and germanium-containing carbene complexes were isolated in high yields as crystalline solids and characterized by elemental analysis, IR, 1H NMR, 13C NMR and 29Si NMR spectroscopy and X-ray diffraction studies. The geometry of the W atoms in the compounds can be described as a distorted square pyramid. 相似文献
72.
Gordetsov A. S. Zimina S. V. Kulagina N. V. Moseeva E. M. Kurskii Yu. A. Lopatin M. A. 《Russian Journal of General Chemistry》2003,73(10):1557-1560
Phenylurea and N-trimethylsilyl-N'-phenylurea react with vanadocene (Cp2V) in toluene to give N-(5-cyclopentadienyl)vanadio-N'-phenylurea as a major product and Cp2VN = C = O and aniline as byproducts. The reaction of N-trimethylsilyl-N'-phenylurea with N-bromosuccinimide in THF produces, instead of expected N-phenylureidosuccinimide and bromotrimethylsilane, succinimide and N-(p-bromophenyl)-N-trimethylsilylurea which hydrolyzes to form (p-bromophenyl)urea. 相似文献
73.
S. I. Sinegubova K. K. Il’in D. G. Cherkasov V. F. Kurskii N. V. Tkachenko 《Russian Journal of Applied Chemistry》2004,77(12):1924-1928
The solubility of components and critical phenomena in a ternary system constituted by potassium nitrate, water, and isopropyl alcohol were studied by the visual-polythermic method in the temperature range 25–90°C. The formation temperature of the critical node of the monotectic equilibrium (critical solution—solid phase) and the solution compositions corresponding to the critical solubility points at different temperatures were determined. Isothermal solubility diagrams of the system were constructed, the previously suggested scheme of the topological transformation of the phase diagrams of ternary stratifying systems constituted by a salt and a binary solvent was confirmed, and the distribution coefficients of isopropyl alcohol at different temperatures were calculated.Translated from Zhurnal Prikladnoi Khimii, Vol. 77, No. 12, 2004, pp. 1945–1949.Original Russian Text Copyright © 2004 by Sinegubova, Ilin, Cherkasov, Kurskii, Tkachenko. 相似文献
74.
G. A. Abakumov V. I. Nevodchikov N. V. Zaitova N. O. Druzhkov L. G. Abakumova Yu. A. Kurskii V. K. Cherkasov 《Russian Chemical Bulletin》1997,46(2):337-340
Base-catalyzed interaction of 3,6-di-tert-butyl-1,2-benzoquinone with malononitrile mainly occurs as 1,4-addition to give 3,6-di-tert-butyl-4-dicyanomethylpyrocatechol. Its oxidation leads to 3,6-di-tert-butyl-4-dicyanomethyl-1,2-benzoquinone, which converts into 3,6-di-tert-butyl-2-hydroxy-α,α-dicyano-1,4-quinomethane in solution and in the solid state. The latter rearranges into isomeric 3,6-di-tert-butyl-5-dicyanomethylenecyclohex-3-ene-1,2-dione. Reverse conversion occurs under the action of amines. Semiquinone complexes of dicyanomethylquinone were studied in solutions by ESR. 相似文献
75.
L. L. Semenycheva N. B. Valetova A. A. Moikin N. L. Pegeev Yu. O. Matkivskaya Yu. A. Kurskii 《Russian Journal of Applied Chemistry》2016,89(10):1667-1672
New butyl acrylate–vinyl n-butyl ether copolymers were synthesized using initiating systems trialkylborane–oxygen, trialkylborane–di-tert-butylperoxytriphenylantimony, and azobis(isobutyronitrile) with compensation dosing of the active monomer. The kind of the initiator does not influence the composition and structure of the copolymers, according to the data of IR and 13С NMR spectroscopy, but influences their molecular-mass parameters, according to the data of gel permeation chromatography. The new copolymers dissolved in dioctyl sebacate (synthetic base of lubricating oils) well compete with related imported thickening additives in the thickening effect at temperatures from–40 to 100°С and in the resistance to mechanical degradation. Simple ways to control in the synthesis step the thickening effect of the polymers are suggested. 相似文献
76.
M. N. Bochkarev T. V. Balashova A. A. Maleev I. I. Pestova G. K. Fukin E. V. Baranov Yu. A. Kurskii 《Russian Chemical Bulletin》2008,57(10):2162-2167
The reactions of phthalonitrile with MeNH2, PrnNH2, and PriNH2 in the presence of catalytic amounts of LnI3 (Ln = Nd or Dy) or LnI3(THF)3 (Ln = Gd or Nd) afford 1,3-bis(alkylimino)isoindolines (Alk = Me (1), Prn (2), or Pri (3), respectively). Under analogous conditions, 2-aminopyridine gives 1,3-bis(2-pyridylimino)isoindoline (4). The X-ray diffraction study of compound 3 showed that, in the crystalline state, this compound exists as the isomer, 1-isopropylamino-3-(isopropylimino)isoindole. 相似文献
77.
Yu. P. Barinova A. L. Bochkarev Yu. E. Begantsova L. N. Bochkarev Yu. A. Kurskii G. K. Fukin A. V. Cherkasov G. A. Abakumov 《Russian Journal of General Chemistry》2010,80(10):1945-1953
The heteroelement-containing alkylidene imide complexes with molybdenum and tungsten Et3SiCH=Mo(NAr)(OR)2 (I), Et3 ECH=W(NAr)(OR)2 (E = Si (II), Ge (III); Ar = 2,6-i-Pr2C6H3; R=CMe2 CF3) and π-complex (RO)2(ArN)Mo(CH2=CH-GeEt3) (IV) were synthesized by the reaction of Alkyl-CH=M(NAr) (OR)2 (M=Mo, W; Alkyl = t-Bu, PhMe2C) with organosilicon and organogermanium vinyl reagents Et3ECH=CH2 (E = Si, Ge). The structure of compounds I–III was determined by X-ray diffraction (XRD). The complexes I–IV are active initiators of metathesis polymerization of cycloolefins. 相似文献
78.
G. G. Skvortsov M. V. Yakovenko G. K. Fukin E. V. Baranov Yu. A. Kurskii A. A. Trifonov 《Russian Chemical Bulletin》2007,56(3):456-460
The reactions of lanthanide tris(borohydrides) Ln(BH4)3(thf)3 (Ln = Sm or Nd) with 2 equiv. of lithium N,N′-diisopropyl-N′-bis(trimethylsilyl)guanidinate in toluene produced the [(Me3Si)2NC(NPri)2]Ln(BH4)2Li(thf)2 complexes (Ln = Sm or Nd), which were isolated in 57 and 42% yields, respectively, by recrystallization from hexane. X-ray
diffraction experiments and NMR and IR spectroscopic studies demonstrated that the reactions afford monomeric ate complexes, in which the lanthanide and lithium atoms are linked to each other by two bridging borohydride groups. The complexes
exhibit catalytic activity in polymerization of methyl methacrylate.
Published in Russian in Izvestiya Akademii Nauk. Seriya Khimicheskaya, No. 3, pp. 441–445, March, 2007. 相似文献
79.
M. P. Shurygina Yu. A. Kurskii S. A. Chesnokov N. O. Druzhkov G. K. Fukin G. A. Abakumov V. K. Cherkasov 《Russian Chemical Bulletin》2006,55(9):1585-1592
Photoreduction of o-benzoquinones in the presence of para-substituted N,N-dimethyl-anilines under irradiation at λ ≥ 500 nm affords pyrocatechol monoethers of the 2-(amino-methoxy)phenol type. In
the subsequent dark reaction, these monoethers undergo quantitative decomposition by a heterolytic mechanism to give the corresponding
pyrocatechols and nitrogen-containing compounds. The rate of this decomposition decreases with decreasing size of the substituent
at the position adjacent to the ether bond that is formed upon photoreduction. The redox characteristics of such pyrocatechol
monoethers can serve as the criterion of their stability. A weakening of the electron-withdrawing properties of quinones and
the electron-donating properties of amines leads to an increase in stability of their reaction products.
Published in Russian in Izvestiya Akademii Nauk. Seriya Khimicheskaya, No. 9, pp. 1528–1535, September, 2006. 相似文献
80.
Andrey I. Poddel'sky Yury A. Kurskii Alexandr V. Piskunov Nikolay V. Somov Vladimir K. Cherkasov Gleb A. Abakumov 《应用有机金属化学》2011,25(3):180-189
New triphenylantimony(V) o‐amidophenolates (AP‐Me,Et)SbPh3 (1) and (AP‐Me,iPr)SbPh3 (2) with unsymmetrically substituted N‐aryl groups and (AP‐Et,Et)SbPh3 (3) with symmetrical N‐aryl group {AP‐R1,R2 is 4,6‐di‐tert‐butyl‐N‐[2‐alkyl(R1),6‐alkyl(R2)‐phenyl]‐o‐amidophenolate dianion} were synthesized and characterized in detail. Complexes were examined for dioxygen activity. The unsymmetrical complexes 1 and 2 were found to form different geometrical isomers (A and B) of spiroendoperoxides [L‐R1,R2(O2)]SbPh3 (4 and 5, respectively) with different dispositions of peroxide group and N‐aryl fragment (methyl and peroxide group are on the same side of the molecule in the less shielded isomer A, and on different sides in the more hindered isomer B). The isomer A prevails over isomer B, reflecting the possibility of steric control on the dioxygen‐binding reaction. Complex 3, where R1 = R2 = Et, formed the isomers 6A and 6B as 50:50. The ratio 4A:4B was 60:40 (for methyl‐ethyl containing complex 4) and it increased up to 80:20 for methyl‐isopropyl‐containing 5. The molecular structure of isomers 4A and 4B was confirmed by X‐ray analysis. Copyright © 2010 John Wiley & Sons, Ltd. 相似文献