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1.
Talismanova M. O. Sidorov A. A. Aleksandrov G. G. Oprunenko Yu. F. Eremenko I. L. Moiseev I. I. 《Russian Chemical Bulletin》2004,53(7):1507-1510
The new dinuclear palladium complex Pd2(-S,N-SC7H5N2)4 with a Chinese-lantern structure was synthesized by the reaction of K2PdCl4 with 2-mercaptobenzimidazole and structurally characterized by X-ray diffraction analysis. 相似文献
2.
N.A. Ustynyuk B.V. Lokshin Yu.F. Oprunenko V.A. Roznyatovsky Yu.N Luzikov Yu.A. Ustynyuk 《Journal of organometallic chemistry》1980,202(3):279-289
IR and PMR spectroscopy was used to study the reversible isomerization of η6- and η5-fluorenylchromium tricarbonyl anions (I and II, respectively) in solutions. Consideration was given to the dependence of the equilibrium position and nature of the resulting particles on the type of cation (Li+, Na+, K+, Ph3PCH3+, n-Bu4N+), the solvent and the presence of solvating cation additives (dicyclohexyl-18-crown-6 (IV), DMSO). The η5-isomer exists in THF solution as an equilibrium mixture of solvent-separated and contact ion pairs (SSIP and CIP, respectively), the cation in the latter being located near the oxygen atom of one of the carbonyl groups. The existence of such an equilibrium is also shown for the salts of the C5H5(CO)3Cr? anion. The dependence of the equilibrium constants for I ? II on the above factors was determined. For the K salt in THF solution at 28°C both IR and PMR spectroscopy gave fairly coincident values of Keq equal to 7.15 and 7.35, respectively. IR spectroscopy was applied to the kinetic studies of the reversible isomerization of K salts of I and II at 0—28°C with and without crown ether IV. The process is shown to be entropy controlled. The equilibrium position is governed by the type of cation, the degree of its solvation and the temperature. The factors promoting the formation of SSIP's lead to the equilibrium being shifted towards I. 相似文献
3.
Kirill V. Zaitsev Yulia A. Piskun Yuri F. Oprunenko Sergey S. Karlov Galina S. Zaitseva Irina V. Vasilenko Andrei V. Churakov Sergei V. Kostjuk 《Journal of polymer science. Part A, Polymer chemistry》2014,52(9):1237-1250
The aluminum complexes containing two iminophenolate ligands of the type (p‐XC6H4NCHC6H4O‐o)2AlR' (R′=Me ( 3, 4 ) or R′=O(CH2)4OCH=CH2 ( 5, 6 ), X=H ( 3, 5 ), F( 4, 6 )) were synthesized and characterized by 1H, 13C NMR spectroscopy, and X‐ray crystallography. The reaction of AlMe3 with two equivalents of substituted iminophenols gave five‐coordinated {ONR}2AlMe ( 3, 4 ) complexes. Subsequent reaction of these methyl complexes with unsaturated alcohol, HO(CH2)4OCH=CH2, resulted in target compounds 5 and 6 in a good yield. It was shown that the complexes ( 3 ‐ 6 ) are monomeric in solution (NMR) and in solid state (X‐ray analysis). The catalytic activity of the complexes 5 and 6 towards ring‐opening polymerization (ROP) of ?‐caprolactone and d,l ‐lactide was assessed. Complex 5 showed higher activity as compared with 6 , while both of these catalysts induced controlled homo‐ and copolymerization to afford the macromonomers with high content of vinyl ether end groups (Fn > 80%) in a broad range of molecular weights (Mn = 4000–30,000 g mol?1) with relatively narrow MWD (Mw/Mn = 1.1–1.5). © 2014 Wiley Periodicals, Inc. J. Polym. Sci., Part A: Polym. Chem. 2014 , 52, 1237–1250 相似文献
4.
Zaitsev K. V. Oprunenko A. Yu. Gloriozov I. P. Nechaev M. S. Oprunenko Yu. F. Kuznetsov A. E. 《Russian Journal of General Chemistry》2021,91(5):828-834
Russian Journal of General Chemistry - Structures of exo- and endo-complexes of fullerene C60 with zero-valent Fe0, in which the metal is localized inside and outside fullerene molecule,... 相似文献
5.
González-Rojas C. H. Oprunenko Yu. F. Morales R. G. E. 《Russian Chemical Bulletin》2004,53(2):474-475
A method for the synthesis of diphenylacetylenes containing donor and acceptor groups in aryl substituents was proposed. 4"-Formyl-4-methoxydiphenylacetylene was synthesized as an example. 相似文献
6.
Kisun'ko D. A. Zabalov M. V. Myshakin E. M. Oprunenko Yu. F. Lemenovskii D. A. 《Russian Journal of General Chemistry》2001,71(11):1751-1753
The regioselectivity in reactions of the lithium salt of 4H-cyclopenta[2,1-b:3,4-b']dithiophene with various electrophilic agents [SiMe3Cl, SnMe3Cl, D2O, Re(CO)5Br] is discussed in terms of the charge and orbital control concepts. 相似文献
7.
Density functional quantum chemical calculations of the mechanisms of metallotropic η2,η2-intra- and η2,η2-inter-ring haptotropic rearrangements (HRs) in 16e zero-valent η2-(naphthalene and anthracene)nickel complexes involving migration of the organometallic group within the same ring or from
one aromatic ring to the other were carried out. The structures of the initial complexes, transition states, and intermediates
were determined. The intra-ring HRs in these systems proceed via low-energy η4-cis-butadiene transition states. The inter-ring HRs proceed along the periphery of the naphthalene and anthracene ligands via high-energy η3-allylic transition states. In contrast to well-investigated η6,η6-inter-ring HRs in (naphthalene and anthracene)tricarbonylchromium complexes, the activation barriers to the η2,η2-inter-ring HRs in the corresponding nickel complexes are much lower. Transition states of these processes are characterized
by higher hapticity compared to the initial complexes. This also distinguishes the nickel complexes from the corresponding
Cr(CO)3 complexes for which the hapticities of transition states of the η6,η6-inter-ring HRs are lower than those of the initial complexes. The calculated activation barriers to the η2,η2-intra-ring HRs in the (naphthalene and anthracene)nickel complexes as well as the barrier to rotation of the organonickel
group in the naphthalene complex are in good agreement with the experimental data. The calculated barriers to the η2,η2-inter-ring HRs in the naphthalene and anthracene complexes are 3–5 kcal mol−1 lower than the experimental values. This is probably due to the competition between two mechanisms of this process, a low-energy
intramolecular mechanism and a high-energy intermolecular dissociative mechanism. 相似文献
8.
El'mira Kh. Lermontova Andrei V. Churakov Judith A. K. Howard Yuri F. Oprunenko Sergey S. Karlov Galina S. Zaitseva 《Heteroatom Chemistry》2008,19(7):738-741
Two compounds of a novel‐type azagermatrane, N(CH2CH2NC6F5)3Ge‐Hal: HalCl ( 1 ), Br ( 2 ), were prepared via a metathetical reaction of trilithium salt of tetramine, N[CH2CH2N(Li)C6F5]3, with corresponding GeHal4. A single crystal structure of 1 was determined by the X‐ray diffraction study: The compound shows the strongest transannular Nax → Ge interaction (2.148(7) Å) among other studied azagermatranes. © 2008 Wiley Periodicals, Inc. Heteroatom Chem 19:738–741, 2008; Published online in Wiley InterScience ( www.interscience.wiley.com ). DOI 10.1002/hc.20476 相似文献
9.
E. Kh. Lermontova A. V. Churakov M. Quan Yu. F. Oprunenko S. S. Karlov G. S. Zaitseva 《Russian Journal of Inorganic Chemistry》2009,54(2):211-218
The reaction of dialkanolamines RN(CH2CH2O)(CHR’CHR’OH) (R = Me, Ph, PhCH2; R’ = H, Ph) with tetraethoxygermane gives either 2,2-diethoxy-1,3,6,2-dioxazagermocanes RN(CH2CH2O)(CHR’CHR’O)Ge(OEt)2 or 1,7,9,15-tetraoxa-4,12-diaza-8-germaspiro[7.7]pentadecanes [RN(CH2CH2O) (CHR’CHR’O)]2Ge depending on the reactant ratio. The chemical behavior of the obtained compounds in substitution reactions at germanium was studied. The product structure was confirmed by elemental analysis data and 1H, 13C, and 19F NMR spectroscopy. The cyclotrigermanoxane [MeN(CH2CH2O)2GeO]3 was studied by X-ray diffraction. 相似文献
10.