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1.
N. F. Yudanov E. G. Boguslavskii I. I. Yakovlev S. P. Gabudar 《Russian Chemical Bulletin》1988,37(2):200-203
| 1. | A method has been developed for the intercalation of solid substances from solutions in organic solvents into graphite fluoride C2Fx. |
| 2. | Molecules of inserted paramagnetic copper complexes and nitroxyl radicals assume oriented positions between the structural layers in graphite fluoride. |
| 3. | The planes of molecules of bis-chelate Cu(II) complexes with acetylacetone, o-hydroxyquinoline, and phenylsalicylaldimine were determined to lie parallel to the C2Fx planes. |
| 4. | A method has also been suggested for the preparation of samples from C2Fx·yA compounds with a higher degree of texturizing (more nearly complete orientation) than can be achieved by pelletizing. |
2.
| 1. | 3,6-Di-tert-butyl-o-quinone (I) forms both hydrogen-bonded and donor-acceptor complexes with 3,6-di-tert-butylpyrocatechol (II) and 3,5-di-tert-butylpyrocatechol (III) in CCl4, and n-hexane solutions. The concentrations of these two types of complexes are approximately equal. |
| 2. | Photoreduction of quinone (I) at 77 K occurs in both the H-bonded and donor-acceptor complexes. |
| 3. | A new mechanism has been proposed to account for radical formation and stabilization in mixed complexes with both H-bonding and donor-acceptor interactions. |
3.
K. M. Gitis V. N. Kornyshev E. S. Shpiro A. A. Grigoryan G. V. Isagulyants Kh. M. Minachev D. P. Shashkin 《Russian Chemical Bulletin》1989,38(7):1349-1354
| 1. | Selective hydrogenation of piperylene into n-amylenes (300C) on applied nickel sulfide was studied in the pulsed mode. It was found that NiS/SiO2 is more selective than NiS/Al2O3. |
| 2. | Treatment of applied NiS with air at 300–500C oxidizes a significant portion of NiS into NiSO4, which gives the catalyst hydroisomerizing properties and permits obtaining up to 44% isoamylenes from piperylene. In contrast to oxidized NiS/SiO2, oxidized NiS/Al2O3 retains hydroisomerizing activity for a much longer time, which is due to the higher resistance of NiSO4 to reduction on Al2O3 than on SiO2. |
| 3. | The data obtained indicate that reduced nickel atoms are the active sites of selective hydrogenation, while sulfur, sulfide or sulfate, is the surface modifier. |
4.
| 1. | It was found that trivalent rhenium chloride has a high activity in the hydrogenation of the C=C bonds in cyclohexene, the pyridine ring, and thiophene at 200–270°, a hydrogen pressure of 130–140 atm, and a reaction time of 3 h. |
| 2. | Rhenium(III) chloride has a higher activity than rhenium heptasulfide in reducing the C=C bond in cyclohexane and the pyridine ring |
5.
I. B. Kovaleva N. D. Mitrofanova L. I. Martynenko V. I. Spitsyn M. G. Felin 《Russian Chemical Bulletin》1988,37(7):1294-1298
| 1. | Protonated, neutral (mixed), and binuclear Cu(II), Ni(II), Co(II), Zn(II), and Mn(II) iminodisuccinate complexes have been synthesized. |
| 2. | Based on the results of IR-spectroscopic, thermal, and other methods of analysis, various conclusions have been drawn concerning the structures of these complexes; for instance, in the case of complexes of composition H2ML·nH2O both carboxyl groups are protonated, and one of them is coordinated to the metal ion. |
6.
Z. N. Parnes G. D. Kolemnikova M. I. Kalinkin D. Kh. Shaapuni S. M. Markosyan D. I. Kursanov 《Russian Chemical Bulletin》1976,25(11):2333-2335
| 1. | Platinum hydrides are the active donors of the hydride ion with respect to Ph3 \mathop C? Ph_3 \mathop C\limits^ \oplus . |
| 2. | The phosphine complexes of Ni, Pd, and Pt exhibit catalytic activity in the ionic hydrogenolysis of alcohols, the Pt complexes being the most active. |
7.
É. D. Filippova N. D. Mitrofanova L. I. Martynenko V. I. Spitsyn 《Russian Chemical Bulletin》1976,25(1):4-7
| 1. | Complexes of the REE, Y, and Sc with hydroxyethylethylenediaminetriacetic acid have been isolated in solid form. The hydrate compositions of the complexes have been determined. |
| 2. | The La and Pr complexes form hydrates of different compositions. The LnL hydrates form slightly nonisostructural groups in the series La-Lu. |
| 3. | According to thermographic analysis data, the hydrate water in the LnL·nH2O complexes of different hydrate compositions is not bonded with the same firmness. |
8.
| 1. | The complexes of Pd(acac)2 and Pd(OAc)2 with triphenylphosphine catalyze the telomerization of isoprene with water in the presence of CO2, which leads to the formation of isomeric dimethyloctadienols. |
| 2. | The complexes of Pd(acac)2 and Pd(OAc)2 with tricresyl phosphite catalyze the formation of the isomeric dimethyloctadienol acetates from isoprene and CH3COOH. |
| 3. | In acetone the complexes of Pd(acac)2, Pd(OAc)2 with triphenylphosphine smoothly and almost completely dimerize isoprene to 2,7-dimethyl-1,3,7-octatriene. |
9.
Kh. M. Minachev V. V. Kharlamov V. I. Garanin D. B. Tagiev 《Russian Chemical Bulletin》1976,25(8):1615-1619
| 1. | Up to a certain point (55%), decationization of NaY zeolites reduces the activity of the zeolites in catalyzing the hydrogenation of 2-methyl-2-butene. Further decationization had no effect on the yield of saturated hydrocarbons. |
| 2. | Plotted as a function of the cation's electrostatic potential, the activity of MNaY zeolites in catalyzing the hydrogenation of 2-methyl-2-butene passes through a maximum. Minimum activity was observed with the NdNaY zeolite. |
| 3. | Experiments in an atmosphere of helium showed that saturated hydrocarbons, resulting from hydrogen redistribution, are frequently formed in the course of reactions on decationized and polyvalent cationic forms of the Y zeolite. |
10.
| 1. | The (Cp2TiCl)2-LiAlH4 system with Al/Ti from 0.25 to 1.5 catalyzes both the homogeneous hydrogenation and isomerization of allylbenzene. |
| 2. | In an argon atmosphere, allylbenzene is isomerized to trans-propenylbenzene with 90–92% selectivity when Al/Ti=1–1.5. |
| 3. | The possibility was demonstrated for reactivation of this catalytic system by its retreatment with LiAlH4. |
11.
| 1. | Complexes of platinum with polyethyleneimine have been synthesized and characterized by spectroscopic methods. |
| 2. | It has been shown that the complex Pt(II)-PEI, reduced with sodium borohydride, is an active and selective catalyst for the hydrogenation of aromatic nitro-compounds. |
12.
A. I. Kokorin A. N. Astanina V. D. Kopylova E. L. Frumkina T. A. Sazykina 《Russian Chemical Bulletin》1989,38(7):1362-1365
| 1. | Kinetic investigations and EPR spectroscopy have shown that in the oxidation of n-butyl mercaptan with molecular oxygen in the presence of Cu(AN-251) complexes the more coordination-saturated structures (with respect to nitrogen) show the higher catalytic activity. |
| 2. | By varying the presorption treatment (protonation of the functional groups of the ion exchanger) and the content of Cu(II) ions one can change the composition and structure of the polymer-metal complexes, thus influencing their catalytic activity. |
13.
| 1. | Rhodium complexes [RhCl(COD)]2, RhCl(PPh3)3, and RhCl3 immobilized on silica gel modified by aminophosphine groups catalyze the transfer of hydrogen from 2-propanol to cyclohexanone, styrene, and 2-cyclohexenone and the isomerization of allylbenzene in an argon atmosphere. |
| 2. | The reduction of cyclohexanone to cyclohexanol is promoted by alkali. The reaction rate is proportional to the amount of catalyst, 2-propanol concentration, and cyclohexanone. The reaction rate decreases at high ketone concentrations. |
| 3. | Styrene is reduced to ethylbenzene extremely slowly. Under these conditions, allylbenzene is not reduced, but rather undergoes isomerization with the predominant formation of trans-propenylbenzene. |
| 4. | The reduction of 2-cyclohexenone to cyclohexanol occurs by the initial reduction of the C=C bond and the subsequent reduction of the C=O group. |
14.
K. A. Andrianov M. M. Il'in V. N. Talanov I. I. Zhurakovskaya 《Russian Chemical Bulletin》1976,25(11):2432-2435
| 1. | The coammonolysis of SiCl4 and Me3SiCl leads to a mixture of tris(trimethylsilylamino)silylamine (I), tetrakis(trimethylsilylamino)silane (II), and also cyclodi- and cyclotrisilazanes. |
| 2. | Additional treatment of the mixture with Me3SiCl increases the yield of (II). |
15.
Z. G. Aliev L. O. Atovmyan E. A. Saratovskikh V. I. Krinichnii V. G. Kartsev 《Russian Chemical Bulletin》1988,37(11):2246-2252
| 1. | Treatment of chloropicolinic acids with aqueous solutions of various copper salts in alcohol media results in the formation of complexes of composition 21. |
| 2. | The structures of the newly synthesized complexes have been shown to be identical in the solid state and in solution. |
| 3. | Diverse modes of coordination of picolinic acid derivatives have been demonstrated; this may be one of the factors responsible for the ease of formation of metallocomplexes in biological systems, and thus may be responsible for the high biological activity (of picolinic acid derivatives). |
16.
A. M. Moiseenkov V. A. Dragan A. V. Lozanova V. V. Veselovskii 《Russian Chemical Bulletin》1988,37(8):1603-1609
| 1. | Dimethyl, diphenyl, and tetramethylene sulfoxide hydrochlorides react with methylheptenyl, citronellyl, and geranyl acetates to give predominantly the allylic chlorination products. |
| 2. | These findings are preferably to be regarded as involving AdE reactions between the weakly electrophlic hydroxy and (or) chlorosulfonium cation and the trisubstituted C=C bond in these olefins at the key stage. |
| 3. | The addition of lithium perchlorate has been found to accelerate this reaction. |
| 4. | Sulfoxide hydrobromides are highly selective brominating agents for the terminal grouping in isopropenoid oligoolefins. |
17.
V. Z. Sharf L. D. Panfilova N. V. Borunova N. V. Antseva L. P. Karapetyan P. G. Antonov K. M. Saldadze 《Russian Chemical Bulletin》1989,38(4):695-698
| 1. | New catalysts, Pd-Sn compounds, were synthesized and fixed to macroporous anion exchangers. They are active in hydrogenation and isomerization reactions of 1-hexene. |
| 2. | The catalytic properties of the Pd-Sn systems depends on the structure of the fixed compound (cluster, complex), the nature and state of the exchanger functional groups (Cl-or OH-form), and the reaction conditions (pH, PH2). |
| 3. | The cluster [Pd4(SnCl2)2(SnCl3)8]5– on the highly basic anion exchanger AV-17-2P (Cl-form) catalyzes mainly the hydrogenation reaction, while the complex [Pd(SnCl3)4]2– catalyzes the isomerization reaction. |
| 4. | The complex [Pd(SnCl3 4)]2–, fixed to the weakly basic anion exchanger AN-221 (OH-form), is active in the isomerization and hydrogenation of 1-hexene under mild conditions. |
18.
I. N. Lisichkina A. I. Vinogradova M. B. Saporovskaya V. K. Latov V. M. Velikov 《Russian Chemical Bulletin》1988,37(5):1029-1031
| 1. | The catalytic system obtained upon the reaction of S- and R-MetHPdCl2 with H2 or NaBH4 has high catalytic activity in the hydrogenation of cinnamic acid derivatives, but the enantioselectivity of this reaction does not exceed 3–3.4%. |
| 2. | The hydrogenation of N-Ac-APhe-S-Tyr in the presence of both R- and S-MetHPdCl2 leads to a product with an 18–24% diastereomeric excess of the R, S isomers. |
19.
Vol'pin M. E. Savitskii A. V. Novodarova G. N. Kolosova E. M. 《Russian Chemical Bulletin》1976,25(7):1430-1434
| 1. | The chelate cobalt complex Co(II)N, N-bis(salicylidene)ethylenediamine [Co(Salen)] is an effective catalyst for NAD-H oxidation in methanol at room temperature. |
| 2. | The rate of oxidation is closely dependent on the structure of the complex catalyst and the composition of the solvent. |
| 3. | The mechanism of Co(Salen) complex catalytic activity in NAD-H autooxidation is discussed in terms of three proposed reaction schemes. |
20.
M. A. Dzyubina G. N. Kuz'mina B. I. Kolobkov A. I. Nekhaev 《Russian Chemical Bulletin》1988,37(10):2057-2062
| 1. | The activation energy for the thermal decomposition of complexes with Fe2(CO)6S2 frameworks amounts to 103–144 kJ/mole. |
| 2. | Decarbonylation and splitting off of the hydrocarbon part of the molecule is the general pattern of behavior of iron carbonyl compounds with sulfur ligands on heating and under electron bombardment. |
| 3. | In complexes containing a norbornadiene fragment, a reverse Diels-Alder reaction takes place under electron bombardment, in addition to splitting off of norbornadiene. |