Mechanism of the Gibbs Reaction. Part 4.1Indophenol Formation viaN-Chlorobenzoquinone Imine Radical Anions. The Aza-SRN2 Chain Reaction Mechanism. Chain Initiation with 1,4-Benzoquinones and Cyanide Ion

1999 ◽  
Vol 64 (18) ◽  
pp. 6530-6540 ◽  
Author(s):  
István Pallagi ◽  
András Toró ◽  
Gyula Horváth
Keyword(s):  
Reaction Mechanism ◽  
Radical Anions ◽  
Chain Reaction ◽  
Cyanide Ion ◽  
Chain Initiation

scholarly journals Enzyme catalysis as a chain reaction

1991 ◽  
Vol 279 (3) ◽  
pp. 855-861 ◽  
Author(s):  
S E Szedlacsek ◽  
R G Duggleby ◽  
M O Vlad
Keyword(s):  
Reaction Mechanism ◽  
Kinetic Mechanism ◽  
Point Of View ◽  
Simple Type ◽  
Chain Reaction ◽  
Proposed Model ◽  
New Type ◽  
A Chain ◽  
Theoretical Considerations ◽  
Classical Mechanism

A new type of enzyme kinetic mechanism is suggested by which catalysis may be viewed as a chain reaction. A simple type of one-substrate/one-product reaction mechanism has been analysed from this point of view, and the kinetics, in both the transient and the steady-state phases, has been reconsidered. This analysis, as well as literature data and theoretical considerations, shows that the proposed model is a generalization of the classical ones. As a consequence of the suggested mechanism, the expressions, and in some cases even the significance of classical constants (Km and Vmax.), are altered. Moreover, this mechanism suggests that, between two successive enzyme-binding steps, more than one catalytic act could be accomplished. The reaction catalysed by alcohol dehydrogenase was analysed, and it was shown that this chain-reaction mechanism has a real contribution to the catalytic process, which could become exclusive under particular conditions. Similarly, the mechanism of glycogen phosphorylase is considered, and two partly modified versions of the classical mechanism are proposed. They account for both the existing experimental facts and suggest the possibility of chain-reaction pathways for any polymerase.

Feasibility of construction of a chemical H2–Cl2laser with a chain reaction mechanism

1981 ◽  
Vol 11 (1) ◽  
pp. 103-105
Author(s):  
A S Bashkin ◽  
N M Gorshunov ◽  
Yu P Neshchimenko ◽  
A N Oraevskiĭ ◽  
A N Shcherbo
Keyword(s):  
Reaction Mechanism ◽  
Chain Reaction ◽  
A Chain

Chain Reaction Mechanism by NOxin SO2Removal Process

2002 ◽  
Vol 16 (1) ◽  
pp. 155-160 ◽  
Author(s):  
Yan Li ◽  
Boon Chye Loh ◽  
Norihiko Matsushima ◽  
Masateru Nishioka ◽  
Masayoshi Sadakata
Keyword(s):  
Reaction Mechanism ◽  
Chain Reaction

Chain Reaction Mechanism in Hydrogen/Fluorine Combustion

2013 ◽  
Vol 117 (51) ◽  
pp. 14042-14047 ◽  
Author(s):  
Akira Matsugi ◽  
Hiroumi Shiina ◽  
Kentaro Tsuchiya ◽  
Akira Miyoshi
Keyword(s):  
Reaction Mechanism ◽  
Chain Reaction

Übergangsmetallkomplexe mit Schwefelliganden, LXXV / Transition Metal Complexes with Sulfur Ligands, LXXV

1991 ◽  
Vol 46 (12) ◽  
pp. 1593-1600 ◽  
Author(s):  
Dieter Sellmann ◽  
Stefan Fünfgelder ◽  
Falk Knoch
Keyword(s):  
Reaction Mechanism ◽  
Transition Metal Complexes ◽  
Coordination Geometry ◽  
Chain Reaction ◽  
Radical Chain ◽  
X Ray ◽  
Square Planar ◽  
Product Forms ◽  
Radical Chain Reaction ◽  
Template Reaction

[Ni(′NHS′4)]2 (′NHS′42- = 2,2′-bis(2-mercaptophenylthio)diethylamine(2-)) was synthesized from Ni(ac)2 and Na2—′NHS′4 and characterized by X-ray structure analysis. In the solid state [Ni(′NHS′4)]2 contains two pseudooctahedral [Ni(′NHS′4)] fragments bridged via thiolate donors, in DMF solution at 110 °C it dissociates into mononuclear entities. The product of the template reaction between [Ni(′S′2)2]2- (′S′22- = 1,2-benzenedithiolate) and (BrC2H4)2NH was shown to contain an as yet unidentified by-product in addition to [Ni(′NHS′4)]2. Pure [Ni(′NHS′4)]2 does not react with pyridine, but the template product forms [Ni(Py)2(′S′2)] which has a square planar coordination geometry with the pyridine rings perpendicular to the NiS2N, plane.Investigation of the template formation of [Ni(′NHS′4)]2 provided evidence that the reaction of [Ni(′S′2)2]2- with (BrC2H4)2NH involves radicals, suggesting a radical chain reaction mechanism.

Rubber, Polyisoprenes, and Allied Compounds. VII. Action of Nitric Oxide

1944 ◽  
Vol 17 (4) ◽  
pp. 772-778
Author(s):  
George F. Bloomfield ◽  
G. A. Jeffrey
Keyword(s):  
Nitric Oxide ◽  
Free Radical ◽  
Reaction Mechanism ◽  
Nitro Compounds ◽  
Chain Reaction ◽  
Considerable Part ◽  
Radical Chain ◽  
Ethylenic Carbon ◽  
Free Radical Chain Reaction ◽  
Radical Chain Reaction

Abstract The reaction of nitric oxide with the olefins cyclohexene, 1-methylcyclohexene, dihydromyrcene, and rubber presents characteristics of a free-radical, chain reaction. In the products, the molecular ratio of combined oxygen to nitrogen is considerably in excess of 1:1, the nitrogen atom being generally directly linked to carbon. In many instances definite nitro compounds have been isolated, and a considerable part of the attack appears to proceed at the ethylenic carbon atoms, either by substitution or addition of NO2 and N2O3 groups. The precise reaction mechanism is obscure.

THE MECHANISM OF POLYMERIZATION REACTIONS

1932 ◽  
Vol 7 (1) ◽  
pp. 113-114 ◽  
Author(s):  
William Chalmers
Keyword(s):  
Reaction Mechanism ◽  
Double Bond ◽  
Hydrogen Atoms ◽  
Chain Reaction ◽  
A Chain

Attention is called to an earlier, unpublished writing by the author wherein a chain-reaction mechanism was suggested for all polymerizations leading to macro-molecular products. It is further pointed out that the only scheme of reaction which is compatible with this mechanism is that which involves only the double bond, i.e., the possibility of the changes taking place by the transference of hydrogen atoms is practically excluded.

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