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171.
172.
A. A. Koridze Y. I. Zdanovich N. V. Andrievskaya Yu. Siromakhova P. V. Petrovskii M. G. Ezernitskaya F. M. Dolgushin A. I. Yanovsky Yu. T. Struchkov 《Russian Chemical Bulletin》1996,45(5):1200-1206
Diyne FcCmCC.CFc (Fc is ferrocenyl) reacts with Ru3(CO)12 in boiling hexane to yield binuclear complexes Ru2 and Ru2(CO)6(C4Fc2(C=CFc)2C=O) containing ruthenacyclopentadiene and diruthenacycloheptadienone rings, respectively. The isomerism of the complexes is due to the different ways of coupling of the alkyne fragments of the diyne, namely, head-to-head, head-to-tail or tail-to-tail. The reaction of enyne PhC=CCH=CHPh with Ru3(CO)12 under similar conditions gives isomeric binuclear complexes Ru2(CO)6(C4Ph2(CH=CHPh)2) and trinuclear clusters Ru3(CO)6(w-CO)2(C4Ph2(CH=CHPh)2) and Ru3(CO)8(3-,1-1-4-2 C4Ph2(CH=CHPh)2). The structure of the latter was determined by X-ray diffraction analysis. The Ru3 triangle coordinates eight terminal CO groups and the organic ligand resulting from the head-to-head dimerization of enyne molecules; the ruthenacyclopentadiene moiety is 4-coordinated to the Ru(CO)2 group, and the third ruthenium atom is 2-bound to one of the PhCH=CH groups.Translated fromIzvestiya Akademii Nauk. Seriya Khimicheskaya, No. 5, pp. 1261–1267, May, 1996. 相似文献
173.
S. V. Timofeev V. I. Bregadze S. N. Osipov I. D. Titanyuk P. V. Petrovskii Z. A. Starikova I. V. Glukhov I. P. Beletskaya 《Russian Chemical Bulletin》2007,56(4):791-797
New alanine derivatives containing both the carboranyl and trifluoromethyl groups were synthesized by the reaction of organometallic
derivatives of o-carborane with methyl trifluoropyruvate imines. When using the 1R-(−)-menthoxycarbonyl protecting group at the nitrogen atom, one of diastereomers was isolated and characterized. Trifluoromethyl-carboranylalanine
methyl esters containing different protecting groups at the nitrogen atom were studied by X-ray diffraction. Both complete
and partial deprotection of the amino and carboxy groups was performed.
Published in Russian in Izvestiya Akademii Nauk. Seriya Khimicheskaya, No. 4, pp. 761–767, April, 2007. 相似文献
174.
Kalinin VN Rys EG Tyutyunov AA Starikova ZA Korlyukov AA Ol'shevskaya VA Sung DD Ponomaryov AB Petrovskii PV Hey-Hawkins E 《Dalton transactions (Cambridge, England : 2003)》2005,(5):903-908
The first carborane triflates, namely, 1-trifluoromethanesulfonylmethyl-o-carborane (2) and 1,2-bis(trifluoromethanesulfonylmethyl)-o-carborane (7), were obtained in high yields in the reactions of 1-hydroxymethyl-o-carborane (1) or 1,2-bis(hydroxymethyl)-o-carborane (6) with triflic anhydride (Tf2O) in CH2Cl2 in the presence of pyridine. When an excess of pyridine is employed, 1-o-carboranylmethylpyridinium triflate (3), which retains a closo-icosahedral structure, or a pyridinium salt (4) with a zwitterionic nido-dicarbaundecaborate anion are obtained from 1, while the nido compound 8 is formed from 6. The reaction of compound 2 or 7 with excess pyridine also gave 3 or 8, respectively. Compound 2 proved to be a convenient carboranylmethylating agent which reacts with nucleophiles (e.g., potassium phthalimide, PPh3 or KCN) to give the corresponding substitution products N-[(o-carboranyl-1-yl)methyl]phthalimide (9), o-carboranylmethylphosphonium salt 10, and 1-cyanomethyl-o-carborane (11). All compounds were characterized by 1H and 11B NMR spectroscopy. The structures of compounds 4, 7 and 8 were established by X-ray analysis. 相似文献
175.
Irina P Beletskaya Alexander S SigeevAlexander S Peregudov Pavel V Petrovskii 《Tetrahedron letters》2003,44(37):7039-7041
A new protocol to prepare unsymmetrical diarylselenides using the reaction of aryl bromides and iodides with easily available Bu3SnSeAr catalyzed by Cu(I) complexes under rather mild conditions and with a very high yield is described. 相似文献
176.
T. L. Lebedeva I. I. Vointseva L. M. Gil’man P. V. Petrovskii T. A. Larina 《Russian Chemical Bulletin》1997,46(4):732-738
It was established by Fourier-transform IR and1H NMR spectroscopy that a portion of the units of poly(1,1,2- and 1,2,3-trichlorobuta-1,3-diene) chains rearrange with migration
of the allylic chlorine (1–4%) and allylic hydrogen (3–10%) under the influence of chloroform. Rearrangement with the migration
of hydrogen under the influence of CDCl3, CCl4, and THF was also observed.
Translated fromIzvestiya Akademii Nauk. Seriya Khimicheskaya, No. 4, pp. 763–768, April, 1997. 相似文献
177.
178.
T. V. Zinevich I. T. Chizhevsky A. I. Yanovsky P. V. Petrovskii L. I. Zakharkin 《Russian Chemical Bulletin》1997,46(11):1965-1966
The previously synthesized mixture of diastereomeric complexescloso-3,3-(η2,3-C7H7CH2)-1-(PhCH2)-3,1,2-RhC2B9H10 was separated by TLC on silica gel into individual diastereomers, whose stereochemistry and relative configurations were
determined by X-ray diffraction analysis.
Triplet- and quadruplet-like signals are marked with an asterisk
Translated fromIzvestiya Akademii Nauk. Seriya Khimicheskaya, No. 11, pp. 2069–2070, November, 1997. 相似文献
179.
180.
I. M. Aladsheva I. V. Leont'eva P. V. Petrovskii T. A. Mastryukova M. I. Kabachnik 《Phosphorus, sulfur, and silicon and the related elements》2013,188(3-4)
Abstract By the reaction of phosphoryl substituted acylmethylenetriphe-nylphosphoranes (I, II) with hydrogen halides prototropic pentad tautomeric systems (III, IV) have been obtained. 相似文献