Výsledky vyhledávání

Synthesis of alkyl-substituted pyridines from CO, C2H4, H2, and NH3 on heterogeneous catalysts

Autor: L. F. Rar, E. S. Mortikov, A. L. Lapidus, B. S. Kosolapova, S. D. Sominskii, D. Z. Levin

Publikováno v: Bulletin of the Academy of Sciences of the USSR Division of Chemical Science. 39:2244-2248

The reaction of preparation of alkyl-substituted pyridines by hydroformylation of ethylene in the presence of ammonia on heterogeneous Rh-containing catalysts with the formation of 2-ethyl-3,5-dimethylpyridine (I) as the basic product with up to 70�

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::1d00084ddad4d535fa1337638ebef46c
https://doi.org/10.1007/bf00958830

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Assessing the evidence on CQI: is the glass half empty or half full?

Autor: S M, Shortell, D Z, Levin, J L, O'Brien, E F, Hughes

Publikováno v: Hospitalhealth services administration. 40(1)

Review of the literature on CQI/TQM in both health care and non-health care settings reveals some evidence of a positive impact for selected dimensions of CQI/TQM. There is little research, however, that examines CQI/TQM as a holistic integrated appr

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=pmid________::56ea522ff7c40826f86cc2c2ed2b9584
https://pubmed.ncbi.nlm.nih.gov/10140873

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Polyfunctional zeolite catalysts in the benzene-olefin-hydrogen system

Autor: D. Z. Levin, E. S. Mortikov, V. A. Plakhotnik, I. I. Lischiner

Publikováno v: Reaction Kinetics and Catalysis Letters. 17:385-389

Benzene alkylation by C2−C4 olefins in the presence of hydrogen over a steam-treated zeolite catalyst containing lanthanum and nickel, has been studied. The promoting action of hydrogen on benzene alkylation by propylene has been established.

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::414ab15049123d9038a198f379d43fd0
https://doi.org/10.1007/bf02065851

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Preparation of substituted 2-phenylpyridines by heterocyclization of acetylene with benzonitriles

Autor: D. Z. Levin, V. K. Promonenkov, E. N. Kayushina, E. S. Mortikov

Publikováno v: Bulletin of the Academy of Sciences of the USSR Division of Chemical Science. 35:1474-1477

1. Heterocyclizations of acetylene with benzonitriles containing a CH3, Cl, CH3O, C2H5O, or (CH3)2N group in the presence of n5-dicyclopentadienylcobalt yield the corresponding 2-substituted pyridines in yields of about 90%. 2. Nitriles containing OH

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::7e7be08cbd5864d13ca8be35993bb31f
https://doi.org/10.1007/bf00954828

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Acidity and catalytic activity of polyfunctional zeolite catalysts in the benzene-propene-diisopropylbenzene system

Autor: D. Z. Levin, V. F. Ilyin, E. S. Mortikov, V. A. Plakhotnik, I. I. Lishchiner

Publikováno v: Reaction Kinetics and Catalysis Letters. 23:261-265

Studies on the effect of the acidity of polyfunctional zeolite catalysts on their activity in benzene alkylation by propene and its transalkylation by diisopropylbenzene (DIPB) have revealed that alkylation and transalkylation of aromatics proceed on

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::cdfd053a481e83f53ea46e23b824d1e7
https://doi.org/10.1007/bf02065571

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A polyfunctional zeolite catalyst in the benzene-olefin-hydrogen system

Autor: V. A. Plakhotnik, D. Z. Levin, I. I. Lishchiner, E. S. Mortikov

Publikováno v: Bulletin of the Academy of Sciences of the USSR Division of Chemical Science. 35:475-478

1. The effect of heat-vapor treatment of a polyfunctional zeolite catalyst on the alkylating and hydrogenating activity was demonstrated. 2. The effect of the acidity was studied by the method of partial poisoning of the surface of the zeolite cataly

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::d1cebb3bfcb8b34b4e3aabf12f3b6c8b
https://doi.org/10.1007/bf00953207

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Quantum-chemical and experimental study of cyclotrimerization of acetylene and heterocyclization of acetylene with nitriles

Autor: L. G. Gorb, N. K. Demidova, I. A. Abronin, E. S. Mortikov, D. Z. Levin

Publikováno v: Bulletin of the Academy of Sciences of the USSR Division of Chemical Science. 31:2317-2319

1. Using the MO LCAO quantum-chemical method in the MINDO/3 valence approximation it was shown that the cyclotrimerization of acetylene is energetically less favorable than the heterocyclization of acetylene with nitriles. 2. For the case of acetylen

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::4a90f4a10b6832a3d9f0b356fd3007aa
https://doi.org/10.1007/bf00958427

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Electronic absorption spectra of heteroanalogs of substituted biphenyl

Autor: D. Z. Levin, V. A. Petukhov

Publikováno v: Bulletin of the Academy of Sciences of the USSR Division of Chemical Science. 36:1638-1640

It has been demonstrated that Dewar's rule is inapplicable to predictions of absorption band behavior for heteroanalogs of C6E5C6E4X. A different criterion is proposed, based on the distribution of electron density in the ground and excited states, t

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::bc39dac49ca66b6b69539a4cc3fc5ba1
https://doi.org/10.1007/bf00960121

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ChemInform Abstract: Preparation of Substituted 2-Phenylpyridines by Heterocyclization of Acetylene with Benzonitriles

Autor: E. S. Mortikov, D. Z. Levin, V. K. Promonenkov, E. N. Kayushina

Publikováno v: ChemInform. 18

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::68f0dced8340a6bf4b265019b83a97d5
https://doi.org/10.1002/chin.198707211

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