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61.
62.
S. B. Artemkina N. G. Naumov A. V. Virovets V. A. Daletskii S. G. Kozlova V. E. Fedorov 《Journal of Structural Chemistry》2013,54(2):443-445
A cluster complex Cs3Nb2I9 is obtained by a high-temperature reaction of niobium, iodine, and cesium iodide. Its crystal structure is determined: trigonal space group P63/mmc, a = 8.2463(3) Å, c = 19.5419(14) Å, V = 1150.84(10) Å3, R(F) = 0.0614. The compound obtained is characterized by temperature independent paramagnetism in the temperature range 70–290 K. 相似文献
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66.
L. B. Serezhkina E. V. Peresypkina A. V. Virovets V. V. Klepov 《Crystallography Reports》2010,55(2):221-223
A new compound (Rb0.50Ba0.25)[UO2(CH3COO)3] is synthesized and its crystal structure is studied by X-ray diffraction. The compound crystallizes in the form of yellow plates belonging to the cubic crystal system. The unit cell parameter a = 17.0367(1) Å, V = 4944.89(5) Å3, space group I \(\bar 4\)3d, Z = 16, and R = 0.0182. The coordination polyhedron of the uranium atom is a hexagonal bipyramid with oxygen atoms of three acetate groups and the uranyl group in the vertices. The crystal chemical formula of the uranium-containing group is AB 3 01 (A = UO 2 2+ , B 01 = CH3COO?). The oxygen atoms of the acetate groups that enter the coordination polyhedron of uranium are bound to barium and rubidium atoms. 相似文献
67.
S. A. Adonin P. A. Abramov A. V. Virovets M. N. Sokolov V. P. Fedin 《Russian Journal of Coordination Chemistry》2010,36(9):637-643
New cluster complexes [Mo3S4(Dppen)3Cl3]PF6 · 1.5CH2Cl2 (Dppen = cis-Ph2PCH=CHPPh2) (I) and [W3S4(Dppe)3Br3]2(ZnBr4)2 · 5.5CH3CN (Dppe = Ph2PCH2CH2PPh2) (II) were synthesized. Their molecular and crystal structures were determined by X-ray diffraction. Diphoshine ligands in the
complexes I and II are coordinated in the bidentate mode, providing an arrangement of three chelate rings, giving rise to chirality. 相似文献
68.
Konstantin A. Brylev Nikolay G. Naumov Alexander V. Virovets Sung-Jin Kim Vladimir E. Fedorov 《Journal of Cluster Science》2009,20(1):165-176
Three novel coordination polymers K5[MnMo6Se8(CN)6] · 8H2O (1), (Me4N)4[{Mn(H2O)2}1.5Mo6Se8(CN)6] · 4H2O (2), and K3[{Mn2(H2O)4}Mo6Se8(CN)6] · 7H2O (3) have been synthesized by layering of a methanol solution of [Mn(salen)]CH3COO (salen–N,N′-bis(salicylidene)ethylenediamine) on an aqueous solution of K7[Mo6Se8(CN)6] · 8H2O. The compounds have been characterized by single-crystal X-ray diffraction analysis. All structures are based on negatively
charged porous polymer frameworks where CN groups of [Mo6Se8(CN)6]7− cluster complexes are coordinated to Mn2+ cations. Cavities in the frameworks are filled by additional cations and solvate water molecules. 相似文献
69.
V. P. Kirin I. Yu. Prikhod’ko V. A. Maksakov A. V. Virovets A. M. Agafontsev B. A. Golovin 《Russian Chemical Bulletin》2009,58(7):1371-1382
The reactions of Ru3(CO)12 with oximes of α-substituted caran-4-one, lemonen-5- and pinan-3-one derivatives were studied. The reactions at elevated
temperatures yield binu-clear complexes Ru2(CO)4L2, with two ruthenium atoms bridging two terpenoid ligands (L) through the oxime groups and coordinated additionally to a nitrogen
or sulfur atom of the NR2 or SR groups respectively. The reactions carried out at room temperature in the presense of Me3NO yield trinuclear complexes Ru3(CO)8L2 with analogous coordination of the terpenoid ligands. In a solution at room temperature these clusters readily transform
to binuclear complexes. The NMR spectroscopy shows the stereochemical nonrigidity of the complexes with the S-CH2-Ph fragment: at room temperature in a solution the benzyl radical undergoes slow rotation about the S-C bond and a change
of the conformation of carane and pinane carbocycles occurs more rapidly. The reactions with pinane and carane derivatives
are stereospecific yielding only one of the possible diastereoisomers. More flexible limonene derivative form both diastereoisomers. 相似文献
70.
A. L. Gushchin M. N. Sokolov K. A. Kovalenko E. V. Peresypkina A. V. Virovets N. I. Alferova V. P. Fedin 《Russian Journal of Coordination Chemistry》2009,35(6):395-400
The reactions between [Mo3(μ3-S)(μ2-S)3(Acac)3(Py)3]PF6 (HAcac is acetylacetone, Py is pyridine) and CuX (X = Cl, I, SCN) afford heterometallic cubane clusters [Mo3(CuX)(μ3-S)4(Acac)3(Py)3]PF6. The structures of two new compounds, [Mo3(CuCl)S4(Acac)3(Py)3]PF6 · 3.25CH2Cl2 · 0.5C6H5CH3 and [Mo3(CuI)S4(Acac)3(Py)3]PF6 · 4C6H6, are determined by X-ray diffraction analysis. All synthesized compounds are characterized by elemental analysis and IR spectra. According to the vibrational spectra, the thiocyanate complex in the solid state is a mixture of the bond isomers [Mo3(CuNCS)S4(Acac)3(Py)3]PF6 and [Mo3(CuSCN)S4(Acac)3(Py)3]PF6, whereas in solution this complex exists as a isothiocyanate form. 相似文献