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51.
Popov L. D. Levchenkov S. I. Shcherbakov I. N. Aleksandrov G. G. Starikova Z. A. Lukov V. V. Kogan V. A. 《Journal of Structural Chemistry》2015,56(1):102-107
Journal of Structural Chemistry - The structures of iron(III) and nickel(II) complexes with the composition [FeL2]Cl·H2O (1) and [Ni(HL′2)]·DMSO·0.5H2O (2), where L and... 相似文献
52.
Igor B. Sivaev Nadezhda Yu. Kulikova Maxim V. Vichuzhanin Zoya A. Starikova Vladimir I. Bregadze 《Journal of organometallic chemistry》2008,693(3):519-525
Practical method of synthesis of the 1,4-dioxane derivative of the closo-dodecaborate anion was developed. The cleavage of the dioxonium ring in [B12H11O(CH2CH2)2O]− with acetylenic alcohols gave rise to the preparation of closo-dodecaborate derivatives with terminal acetylene group. These compounds can be introduced into click reactions with phenylazide leading to the corresponding triazoles. The structures of (Bu4N)[B12H11O(CH2CH2)2O] and (Bu4N)2[B12H11(OCH2CH2)2OCH2CCH] · 0.5HOCH2CCH were determined by single-crystal X-ray diffraction. 相似文献
53.
T. Yu. Orlova Yu. S. Nekrasov P. V. Petrovskii M. G. Ezernitskaya Z. A. Starikova O. L. Lependina 《Russian Chemical Bulletin》2008,57(1):63-67
The metallation of the η5-C5H5(CO)2Fe-η1,η5-C5H4Mn(CO)3 complex with BunLi (THF, ?78 °C) followed by the treatment of the lithium derivative with Ph2PCl afforded the η5-Ph2PC5H4(CO)2Fe-η1,η5-C5H4Mn(CO)3 complex. The reaction of the latter with η5-C5H5(CO)3WCl in the presence of Me3NO produced the trinuclear complex η5-C5H5Cl(CO)2W-η1,η5-(Ph2P)C5H4(CO)2Fe-η1,η5-C5H4Mn(CO)3. The structure of the latter complex was established by IR, UV, and 1H and 31P NMR spectroscopy and X-ray diffraction. The reaction of MeSiCl3 with three equivalents of LiC5H4(CO)2Fe-η1,η5-C5H4Mn(CO)2PPh3 gave the hexanuclear complex MeSi[C5H4(CO)2Fe-η1,η5-C5H4Mn(CO)2PPh3]3. 相似文献
54.
M. M. Krayushkin D. V. Pashchenko B. V. Lichitsky B. V. Nabatov A. N. Komogortsev L. G. Vorontsova Z. A. Starikova 《Russian Chemical Bulletin》2008,57(10):2168-2174
The reactions of dithienyl-substituted furanones with hydrazines afford the corresponding pyridazinone-bridged dithienylethenes
with photochromic properties. The structure of 4,5-bis-(2,5-dimethyl-3-thienyl)-2,6-dimethyl-2H-pyridazin-3-one was established by X-ray diffraction. 相似文献
55.
Photochemical arene exchange in the ferracarborane complex [1-(η-C6H6)-12-ButNH-1,2,4,12-FeC3B8H10]+
D. A. Loginov M. M. Vinogradov Z. A. Starikova P. V. Petrovskii J. Holub A. R. Kudinov 《Russian Chemical Bulletin》2008,57(11):2294-2297
The benzene complex [1-(η-C6H6)-12-ButNH-1,2,4,12-FeC3B8H10]+ (3a) was synthesized by the photochemical reaction of [(η5-C6H7)Fe(η-C6H6)]+ (1) with the anion [7-ButNH-7,8,9-C3B8H10]− followed by the treatment of ferracarborane 1-(η5-C6H7)-12-ButNH-1,2,4,12-FeC3B8H10 (2) with hydrochloric acid. The benzene ligand in cation 3a is replaced by alkyl-substituted benzenes under visible light irradiation in CH2Cl2 to form [1-(η-C6R6)-12-ButNH-1,2,4,12-FeC3B8H10]+ (3b–e; C6R6 is toluene (b), mesitylene (c), hexamethylbenzene (d), or anisole (e)). The structure of [3c]PF6 was established by X-ray diffraction. 相似文献
56.
M. M. Krayushkin L. G. Vorontsova V. N. Yarovenko I. V. Zavarzin V. N. Bulgakova Z. A. Starikova V. A. Barachevskii 《Russian Chemical Bulletin》2008,57(11):2402-2404
New 1,2-dihetarylethene containing two 6-acetyl-2-methylbenzo[b]thiophene moieties linked by the cyclopentene bridge was synthesized. In a toluene solution, this compound exhibits photochromic properties. The X-ray diffraction study showed that the crystal structure also has properties characteristic of photochromic compounds, viz., the anti-parallel conformation of the molecule and the distance between the reaction centers equal to 3.729 Å. 相似文献
57.
G. V. Giniyatullina O. B. Flekhter I. P. Baikova Z. A. Starikova G. A. Tolstikov 《Chemistry of Natural Compounds》2008,44(5):603-605
A practical method for preparing methyl 3β-amino-3-dexoybetulinate that is based on column chromatographic separation of 3α- and 3β-t-butoxycarbonates and subsequent removal of the protecting group using formic acid is proposed. The structure of methyl 3β-N-(t-butoxycarbonyl)-3-deoxybetulinate was established by an x-ray structure analysis.
Translated from Khimiya Prirodnykh Soedinenii, No. 5, pp. 488–490, September-October, 2008. 相似文献
58.
M. S. Chernov’yants I. V. Burykin Z. A. Starikova A. A. Rassoshenko 《Russian Journal of Inorganic Chemistry》2016,61(2):217-220
Complexation in system 4-bromobenzyltriphenylphosphonium bromide–molecular iodine in chloroform has been studied. The limit number of iodine molecules coordinated by 4-bromobenzyltriphenylphosphonium bromide in solution and the stability constant of the complex have been determined by a spectrophotometric method using iodine average number functions. According to the X-ray diffraction data, the crystal structure of the charge transfer complex is formed by anion BrI2? and cation [(C6H5)3PCH2C6H4Br]+. In a crystal, translationally identical cations C25H21BrP+ form stacks along the y axis. Diiodobromide anions dimerized due to the I–I shortened contacts are located between the stacks. 相似文献
59.
A density functional B3LYP*/6-311++G(d,p) quantum chemical study of the interaction of FeII complexes with o-diiminobenzoquinones showed that adduct formation is accompanied by oxidation of the metal ion and conversion of the redox-active ligand to the semiquinonate form. Variation of substituents at nitrogen atoms of the bis-chelate and diimine made it possible to reveal the spin-crossover complexes. The nature and strength of the exchange interactions between the unpaired electrons of paramagnetic centers of the adducts studied depend on the spin state of their isomers and on the type of the iron complex. 相似文献
60.
Barlow S Zhang Q Kaafarani BR Risko C Amy F Chan CK Domercq B Starikova ZA Antipin MY Timofeeva TV Kippelen B Brédas JL Kahn A Marder SR 《Chemistry (Weinheim an der Bergstrasse, Germany)》2007,13(12):3537-3547
Several hexaazatrinaphthylene derivatives and a tris(thieno)hexaazatriphenylene derivative have been synthesised by reaction of the appropriate diamines with hexaketocyclohexane. The crystal structure of 2,3,8,9,14,15-hexachloro-5,6,11,12,17,18-hexaazatrinaphthylene has been determined by X-ray diffraction; this reveals a molecular structure in good agreement with that predicted by density functional theory (DFT) calculations and pi-stacking with an average spacing between adjacent molecular planes of 3.18 A. Solid-state ionisation potentials have been measured by using UV photoelectron spectroscopy and fall in the range of 5.99 to 7.76 eV, whereas solid-state electron affinities, measured using inverse photoelectron spectroscopy, vary in the range -2.65 to -4.59 eV. The most easily reduced example is a tris(thieno)hexaazatriphenylene substituted with bis(trifluoromethyl)phenyl groups; DFT calculations suggest that the highly exothermic electron affinity is due both to the replacement of the outermost phenylene rings of hexaazatrinaphthylene with thieno groups and to the presence of electron-withdrawing bis(trifluoromethyl)phenyl groups. The rather exothermic electron affinities, the potential for adopting pi-stacked structures and the low intramolecular reorganisation energies obtained by DFT calculations suggest that some of these molecules may be useful electron-transport materials. 相似文献