The reaction mechanism in the system132Xe+56Fe at 5.73 MeV/u: Evidence for a new type of strongly damped collisions

1978 ◽  
Vol 288 (4) ◽  
pp. 391-400 ◽  
Author(s):  
B. Heusch ◽  
C. Volant ◽  
H. Freiesleben ◽  
R. P. Chestnut ◽  
K. D. Hildenbrand ◽  
...  
Keyword(s):  
Reaction Mechanism ◽  
Strongly Damped Collisions ◽  
New Type ◽  
Strongly Damped

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.

A suggestion for a parameter free model of strongly damped collisions

1978 ◽  
Vol 76 (1) ◽  
pp. 39-43 ◽  
Author(s):  
J.N. De ◽  
S.I.A. Garpman ◽  
D. Sperber ◽  
K. Tam
Keyword(s):  
Free Model ◽  
Strongly Damped Collisions ◽  
Strongly Damped

Thermal equilibrium in strongly damped collisions

1985 ◽  
Vol 31 (3) ◽  
pp. 1053-1056 ◽  
Author(s):  
S. K. Samaddar ◽  
J. N. De ◽  
K. Krishan
Keyword(s):  
Thermal Equilibrium ◽  
Strongly Damped Collisions ◽  
Strongly Damped

Microscopic treatment of Pauli blocking in strongly damped collisions

1983 ◽  
Vol 37 (11) ◽  
pp. 403-408 ◽  
Author(s):  
B. Samanta ◽  
D. Sperber ◽  
M. Zielinska-Pfabe
Keyword(s):  
Pauli Blocking ◽  
Strongly Damped Collisions ◽  
Strongly Damped

scholarly journals Rhodium(III)-Catalyzed [4+2] Annulation via C-H Activation: Synthesis of Multi-Substituted Naphthalenone Sulfoxonium Ylides

Molecules ◽  
2019 ◽  
Vol 24 (10) ◽  
pp. 1884 ◽  
Author(s):  
Xiaohan Song ◽  
Xu Han ◽  
Rui Zhang ◽  
Hong Liu ◽  
Jiang Wang
Keyword(s):  
Reaction Mechanism ◽  
Reaction Conditions ◽  
Practical Utility ◽  
Neutral Reaction ◽  
New Type ◽  
Substrate Tolerance

A convenient Rh(III)-catalyzed C-H activation and cascade [4+2] annulation for the synthesis of naphthalenone sulfoxonium ylides has been developed. This method features perfect regioselectivity, mild and redox-neutral reaction conditions, and broad substrate tolerance with good to excellent yields. Preliminary mechanistic experiments were conducted and a plausible reaction mechanism was proposed. The new type naphthalenone sulfoxonium ylides could be further transformed into multi-substituted naphthols, which demonstrates the practical utility of this methodology.

scholarly journals A new electrochemical strategy for the synthesis of a new type of sulfonamide derivatives

2020 ◽  
Vol 10 (1) ◽  
Author(s):  
Hamed Goljani ◽  
Zahra Tavakkoli ◽  
Ali Sadatnabi ◽  
Mahmood Masoudi-khoram ◽  
Davood Nematollahi
Keyword(s):  
Reaction Mechanism ◽  
Functional Groups ◽  
Disproportionation Reaction ◽  
Carbon Electrodes ◽  
One Pot ◽  
Electrochemical Generation ◽  
Type Reaction ◽  
Second Stage ◽  
Ping Pong ◽  
New Type

Abstract This study is the first report of electrochemical generation of hydroxyimino-cyclohexa-dien-ylidene haloniums and their application in the synthesis of new halo-N-hydroxysulfonamide derivatives. These compounds were obtained in a one-pot process based on the reaction of halonium acceptors with arylsulfinic acids. The method is easy to carry out, as it is performed using the carbon electrodes in a simple undivided cell. The protocol has a broad substrate scope with a tolerance for a variety of functional groups. The proposed mechanism is a ping-pong type reaction mechanism, which in its first stage the halonitroarene is reduced at the cathode to related hydroxylamine and in the second stage the cathodically generated hydroxylamine by oxidation at the anode and participating in disproportionation reaction is converted to the halonium acceptor.

The strongly damped collisions of 120 MeV 20Ne with 27Al

1977 ◽  
Vol 277 (3) ◽  
pp. 477-492 ◽  
Author(s):  
J.B. Natowitz ◽  
M.N. Namboodiri ◽  
R. Eggers ◽  
P. Gonthier ◽  
K. Geoffroy ◽  
...  
Keyword(s):  
Strongly Damped Collisions ◽  
Strongly Damped
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