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141.
A. A. Koridze A. M. Sheloumov F. M. Dolgushin A. I. Yanovsky P. V. Petrovskii O. L. Tok 《Russian Chemical Bulletin》1998,47(5):995-1000
Reactions of the alkyne cluster Os3(μ-CO)(CO)9(μ3-Me3C2Me) with alkynes Me3SiC≡CR (R=Me, Bun) in refluxing hexane result in the formation of clusters Os3(CO)9{μ3-C(SiMe3)=C(Me)C=C(SiMe3)=C(Me)C=C(SiMe3)R} (2a: R=Me;3a: R=Bun). The dienediyl ligand in these complexes is formed by alkyne-vinylidene coupling, with vinylidene generated in the course of reaction from the alkyne molecule by the acetylene-vinylidene rearrangement involving a 1,2-shift of the Me3Si group. The structure of cluster3a was determined by X-ray structural analysis. The dienediyl ligand is coordinated to three metal atoms of the cluster framework by two π-ethylene bonds with two osmium atoms and two σ-bonds with the third osmium atom with the formation of the osmacyclobutene moiety. The1H and13C NMR study of13CO-enriched samples of clusters2a and3a revealed the stereochemical nonrigidity of these molecules due to the exchange of the hydrocarbon and carbonyl ligands. 相似文献
142.
Konoplev V. E. Dolgushin F. M. Pisareva I. V. Vorontsov E. V. Lemenovskii D. A. Chizhevsky I. T. 《Russian Chemical Bulletin》2003,52(12):2732-2739
Heating of 1,1,3-(PPh3)3-1-H-1,2,4-RuC2B8H9 with 2-(hydroxymethyl)bicyclo[2.2.1]hepta-2,5-diene in arene solvents (benzene, toluene, or mesitylene) unexpectedly afforded the ruthenium arene complexes 1-(η6-arene)-3-(C7H9CH2O)-isonido-1,2,4-RuC2B8H9 containing the nortricyclene fragment in the carborane ligand. 相似文献
143.
I.A. Tikhonova F.M. Dolgushin P.V. Petrovskii A.P. Zaraisky 《Journal of organometallic chemistry》2007,692(5):953-962
Cyclic trimeric perfluoro-o-phenylenemercury (o-C6F4Hg)3 (1) is capable of reacting with nitromethane to give complex {[(o-C6F4Hg)3](CH3NO2)} (2) containing one molecule of the nitro compound per one macrocycle molecule. In this complex, the nitromethane ligand is bound to 1 by its both oxygen atoms, one of which is simultaneously coordinated to all three Hg centres of the macrocycle while the other interacts with a single Hg centre. The complex of similar composition, {[(o-C6F4Hg)3](C6H5NO2)} (3), is produced in the interaction of 1 with nitrobenzene. In this complex too, the both oxygen atoms of the nitro group are involved in the bonding to the macrocycle. A distinctive feature of 3 is that here one oxygen atom of the coordinated nitro derivative is bound by only two Hg centres of 1 whereas the other interacts again with a single Hg site. The reaction of 1 with 5-nitroacenaphthene affords a 1:1 complex, {[(o-C6F4Hg)3](C12H9NO2)} (4), having a polydecker sandwich structure in the crystal. Unlike in 3, the aromatic rings of the nitroarene units in 4 are disposed virtually in parallel to the macrocycles. The nitro compound in 4 behaves again as a bidentate ligand, forming three Hg-O bonds with one of the adjacent macrocycles and a single Hg-O bond with another molecule of 1. The complex is characterized also by shortened Hg-C contacts between the Hg centres of 1 and the carbon atoms of the nitroarene moiety as well as shortened C-C contacts between the carbon atoms of the nitroarene and the macrocycle. In the interaction of 1 with 1-nitropyrene, complexes of two compositions, viz. {[(o-C6F4Hg)3](C16H9NO2)} (5) and {[(o-C6F4Hg)3](C16H9NO2)3} (6) are formed. An X-ray diffraction study of 6 has shown that in this adduct two of three coordinated molecules of the nitro compound are located on one side of the metallacycle plane while the third nitroarene molecule is disposed on its other side. The aromatic rings of all three nitropyrene ligands in 6 are practically parallel to the mean plane of the macrocycle. In contrast to 2-4, each molecule of the nitroarene in 6 is bonded to 1 by a single oxygen atom which is coordinated only to one Hg centre. In the case of one of the nitropyrene ligands that forms much longer Hg-O bond with 1 than two others, an additional contribution to the bonding is made by shortened Hg-C contacts between the macrocycle and the carbon atoms of the aromatic pyrene core and also by shortened C-C contacts between the carbon atoms of the coordinated nitroarene and 1. The synthesized adducts are the first examples of complexes of an anticrown with nitro compounds. 相似文献
144.
Balagurova EV Cheredilin DN Kolomnikova GD Tok OL Dolgushin FM Yanovsky AI Chizhevsky IT 《Journal of the American Chemical Society》2007,129(12):3745-3753
Reactions of the [K]+ salts of the [nido-7,9-C2B9H12]- anion (2) and its C-phenylated derivative [7-Ph-nido-7,9-C2B9H11]- (4) with [OsCl2(PPh3)3] (3) proceed in benzene at ambient temperature with the formation of 16-electron chlorohydrido-Os(IV) exo-nido complexes, [exo-nido-10,11-{(Ph3P)2OsHCl}-10,11-(mu-H)2-7-R-7,9-C2B9H8] (5: R = H; 6: R = Ph), along with the small amounts of the charge-compensated nido-carboranes [nido-7,9-C2B9H11PPh3] (7) and [7-Ph-nido-7,9-C2B9H10PPh3] (8) as byproducts. However, when carried out under mild heating in ethanol, the reaction of 2 with 3 selectively afforded a 16-electron dihydrido-Os(IV) exo-nido complex [exo-nido-10,11-{(Ph3P)2OsH2}-10,11-(mu-H)2-7,9-C2B9H9] (9). Structures of both complexes 5 and 9 have been confirmed by single-crystal X-ray diffraction studies, which revealed that nido-carboranes in these species function as a bidentate dicarbollide ligands [7-R-nido-7,9-C2B9H10]2- linked to the Os(IV) center via two B-H...Os bonds involving adjacent B-H vertices in the upper CBCBB belt of the carborane cage. Thus, compounds 5 and 9 represent the first structurally characterized exo-nido-metallacarboranes based on meta-dicarbollide-type ligands. Variable-temperature 1H and 31P{1H} NMR experiments indicate that complex 9 is fluxional in solution and shows an unusual exchange between terminal Os-(H)2 and bridging {B-H}2...Os hydrogen atoms. Upon heating in d8-THF at 65 degrees C, complex 9 converts irreversibly to its closo isomer [2,2-(PPh3)2-2,2-H2-closo-2,1,7-OsC2B9H11] (13), which could thus be obtained as a pure crystalline solid. The structure of 13 has been established on the basis of analytical and multinuclear NMR data and a single-crystal X-ray diffraction study. 相似文献
145.
146.
A. I. Fisher D. O. Ruzanov N. S. Panina A. N. Belyaev S. A. Simanova F. M. Dolgushin A. V. Shchukarev 《Russian Journal of General Chemistry》2008,78(11):2006-2012
Oxidation of Co(MeCOO)2·4H2O with ozone in acetic acid followed by the treatment with nitric acid results in the formation of the trinuclear oxo-centered acetate complex [CoIII 3(μ3-O)(μ-O2CMe)6(OH2)3] NO3·MeCOOH ([I]NO3·MeCOOH). Reasons of a decrease in the idealized symmetry of molecular structure (D 3h → D 3) of the complex cation [I]+ were analyzed by means of quantum-chemical calculations. The complex does not retain its structure in solutions (in water, methanol, and ethanol). 相似文献
147.
Antipin M. Yu. Starikova Z. A. Yanovskii A. I. Dolgushin F. M. Lysenko K. A. Khrustalev V. N. Vorontsov I. I. Korlyukov A. A. Andreev G. B. Neretin I. S. 《Russian Journal of Coordination Chemistry》2001,27(4):221-258
In this paper, selected results of the structural and theoretical studies of different types of coordination compounds synthesized in the Laboratory of X-ray Structural Studies of the Nesmeyanov Institute of Organoelement Compounds (NIOC), Russian Academy of Sciences (Center for X-ray Structural Studies in the General and Technical Chemistry Division, RAS) are presented. 相似文献
148.
Anna N. Philippova Daria V. Vorobyeva Pavel S. Gribanov Fedor M. Dolgushin Sergey N. Osipov 《Molecules (Basel, Switzerland)》2022,27(20)
An efficient way to access highly functionalized proline derivatives was developed based on a Cu(I)-catalyzed reaction between CF3-substituted allenynes and tosylazide, which involved a cascade of [3 + 2]-cycloaddition/ketenimine and a rearrangement/Alder-ene cyclization to afford the new proline framework with a high diastereoselectivity. 相似文献
149.
Yuliya S. Vysochinskaya Anton A. Anisimov Sergey A. Milenin Alexander A. Korlyukov Fedor M. Dolgushin Elena G. Kononova Alexander S. Peregudov Mikhail I. Buzin Olga I. Shchegolikhina Aziz M. Muzafarov 《Mendeleev Communications》2018,28(4):418-420
New all-cis-tetra(p-tolyl)cyclotetrasiloxanetetraol and its derivatives with Si(CH = CH2)Me and Si(H)Me2 groups have been prepared and characterized by IR and NMR spectroscopy, GPC, mass spectrometry, TGA and DSC. Molecular and crystalline structures of the tetraol and its derivative with four Si(CH = CH2)Me groups have been determined by single-crystal X-ray diffraction. 相似文献
150.
E. S. Kelbysheva L. N. Telegina I. A. Godovikov T. V. Strelkova A. F. Smol’yakov F. M. Dolgushin N. M. Loim 《Russian Chemical Bulletin》2012,61(12):2326-2337
The orientation in the metalation of monosubstituted carbamate-, amide-, ureido-, and allyl-containing derivatives of cymantrene was determined for the first time. The data obtained open up a synthetic route to polyfunctional 1,2- and 1,3-disubstituted cymantrenes. They can serve as the starting materials for the preparation of chelate complexes of (dicarbonyl)-(cyclopentadienyl)manganese, which hold promise as novel organometallic photochromes. A method for the synthesis of earlier unknown chiral derivatives of cymantrene with a quaternary carbon atom in position 1 of the side chain was proposed. 相似文献