Metal complexes in catalytic transformations of olefins. 6. Mechanism of formation and characteristics of the precursors of active centers of ethylene dimerization to butene-1 in the Ti(O-n-Bu)4-AlEt3 system in ethers

1992 ◽  
Vol 41 (7) ◽  
pp. 1168-1174 ◽  
Author(s):  
D. B. Furman ◽  
L. N. Russiyan ◽  
V. N. Noskova ◽  
O. V. Bragin ◽  
P. E. Matkovskii
Keyword(s):  
Metal Complexes ◽  
Mechanism Of Formation ◽  
Ethylene Dimerization ◽  
Active Centers ◽  
Catalytic Transformations

Metal complexes in the catalytic transformations of olefins. 5. Catalytic synthesis of C9-C24 olefins from propylene

1992 ◽  
Vol 41 (6) ◽  
pp. 1011-1014
Author(s):  
D. B. Furman ◽  
A. O. Ivanov ◽  
A. Yu. Belyankin ◽  
A. G. Pogorelov ◽  
T. V. Yanchevskaya ◽  
...  
Keyword(s):  
Metal Complexes ◽  
Catalytic Synthesis ◽  
Catalytic Transformations

scholarly journals RADICAL INITIATED COPOLYMERIZATION OF METHYL METHACRYLATE AND ACRYLONITRILE IN PRESENCE OF IRON COMPLEXES

2021 ◽  
Vol 64 (4) ◽  
pp. 34-41
Author(s):  
Ruslan R. Galimullin ◽  
Natalya N. Sigaeva ◽  
Sergey V. Kolesov
Keyword(s):  
Free Radicals ◽  
Nmr Spectroscopy ◽  
Methyl Methacrylate ◽  
Metal Complexes ◽  
1H Nmr Spectroscopy ◽  
Initial Rate ◽  
Iron Complexes ◽  
Active Centers ◽  
Iron Metal ◽  
Effective Constants

This article represents data on the effect of organometallic iron complexes: ferrocene, dicarbonyl dimer of cyclopentadienyl iron and tricarbonyl cyclooctatetraene iron on the copolymerization of methyl methacrylate (MMA) and acrylonitrile (AN) initiated by benzoyl peroxide. It is shown that the introduction of metal complexes and their structure affect the initial rate of copolymerization, the form of the diagrams of the composition of the obtained copolymers, and the values of the effective constants of the relative activities of the comonomers in the copolymerization of methyl methacrylate and acrylonitrile (system metallocomplex of iron – peroxide benzoyl: ferrocene – peroxide benzoyl: rММА = 1.58; rАН= 0.08 in 60 °С; rММА = 1.30; rАН = 0.05 in 50 °С; dicarbonyl dimer cyclopentadienyl iron–peroxide benzoyl: rММА = 1.36; rАН = 0.06 in 60 °С; rММА = 1.09; rАН = 0.14 in 50 °С; tricarbonyl cyclooctatetraene iron -peroxide benzoyl: rММА = 1.08; rАН = 0.15 in 60 °С; rММА = 1.14; rАН = 0.05 in 50 °С; peroxide benzoyl: rММА = 1.11; rАН = 0.07 in 60 °С; rММА = 1.11; rАН = 0.07 in 50 °С). The proportions of triadic sequences of units in copolymers, experimentally determined from 1H NMR spectroscopy, are given, as well as the calculated proportions of dyads. The presence of iron metal complexes affects the distribution of the proportions of the triad and dyad sequences of units, as well as their microstructure in copolymers. These changes are explained by the formation of macromolecules, both with the participation of free radicals and the stereospecific coordination active centers of polymerization that are formed in the presence of iron complexes.

Mechanism of formation ofo-semiquinone metal complexes under mechanical pulse action on metal oxide-quinone-pyrocatechol systems

1999 ◽  
Vol 48 (2) ◽  
pp. 323-329 ◽  
Author(s):  
A. I. Aleksandrov ◽  
A. I. Prokof'ev ◽  
N. N. Bubnov ◽  
R. R. Rakhimov ◽  
I. A. Aleksandrov ◽  
...  
Keyword(s):  
Metal Oxide ◽  
Metal Complexes ◽  
Pulse Action ◽  
Mechanism Of Formation ◽  
Mechanical Pulse

Enhancement of Schiff base biological efficacy by metal coordination and introduction of metallic compounds as anticovid candidates: a simple overview

2021 ◽  
Vol 0 (0) ◽  
Author(s):  
Jan Mohammad Mir ◽  
Sheikh Abdul Majid ◽  
Aabid Hussain Shalla
Keyword(s):  
Schiff Base ◽  
Metal Complexes ◽  
Antimicrobial Properties ◽  
Biological Evaluation ◽  
Organic Ligands ◽  
Molecular Scaffolds ◽  
Mechanism Of Formation ◽  
Biological Efficacy ◽  
Metallic Compounds ◽  
Azomethine Compounds

Abstract In the prevailing apocalyptic times of coronavirus disease (COVID-19), the whole scientific community is busy in designing anticovid drug or vaccine. Under such a fascination, Schiff bases or azomethine compounds are continuously interrogated for antimicrobial properties. These compounds represent interesting molecular scaffolds of huge medicinal and industrial relevance. In order to update the current literature support of such facts this article introduces the synthetic chemistry, mechanism of formation of a Schiff base, followed by biological efficacy and finally a suitable discussion on the mechanism of respective bioactivity. In most of the studies revealing the biological evaluation of azomethine functionalized frameworks, fascinated results have been recorded in case of azomethine-metal complexes as compared with the free ligands. Also, the CH=N or C=N form of organic ligands have indicated marvellous results. Therefore, in connection with the biological relevance and microbicidal implications of such metallic compounds, this works reviews the current update of microorganism fighting efficacy of azomethine metal complexes along with the introduction of some metallodrugs as excellent candidates having COVID-19 defending potentiality.

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