Reactions of the hydrogen atom in solution. VI. Addition of hydrogen atoms to substituted benzenes. Use of the Hammett equation for correlating radical reactions

1973 ◽  
Vol 95 (21) ◽  
pp. 6993-6998 ◽  
Author(s):  
William A. Pryor ◽  
T. H. Lin ◽  
J. P. Stanley ◽  
R. W. Henderson
Keyword(s):  
Hydrogen Atom ◽  
Radical Reactions ◽  
Hammett Equation ◽  
Hydrogen Atoms ◽  
Substituted Benzenes

Formation of surface layer of hydrogen in pure aluminum

2019 ◽  
Vol 484 (1) ◽  
pp. 56-60
Author(s):  
D. A. Indejtsev ◽  
E. V. Osipova
Keyword(s):  
Surface Layer ◽  
Hydrogen Atom ◽  
Ab Initio ◽  
Pure Aluminum ◽  
Hydrogen Atoms ◽  
Energy Characteristics ◽  
Aluminum Crystal

Hydrogen atom behavior in pure aluminum is described by ab initio modelling. All main energy characteristics of the system consisting of hydrogen atoms in a periodic aluminum crystal are found.

Hydrogen Atom Release Dynamics in Radical–Radical Reactions: Saturated vs Unsaturated

ChemPhysChem ◽  
2008 ◽  
Vol 9 (8) ◽  
pp. 1099-1103 ◽  
Author(s):  
Sung-Eui Youn ◽  
You-Hwa Ok ◽  
Jong-Ho Choi
Keyword(s):  
Hydrogen Atom ◽  
Radical Reactions ◽  
Atom Release

ChemInform Abstract: Addition of Trichloromethyl Radicals to Alkenes: The Use of Phosphites as Hydrogen-Atom Donors in Intermolecular Radical Reactions.

ChemInform ◽  
2010 ◽  
Vol 33 (7) ◽  
pp. no-no
Author(s):  
Jenny M. Barks ◽  
Bruce C. Gilbert ◽  
Andrew F. Parsons ◽  
Bala Upeandran
Keyword(s):  
Hydrogen Atom ◽  
Radical Reactions

scholarly journals The photolysis of ammonia

1940 ◽  
Vol 175 (961) ◽  
pp. 187-207 ◽  
Keyword(s):  
Hydrogen Atom ◽  
Preceding Paper ◽  
Ammonia Molecule ◽  
Experimental Techniques ◽  
Hydrogen Atoms ◽  
Atom Concentration ◽  
Important Discrepancy

It has been shown in the preceding paper that the hypothesis that hydrazine is responsible for the anomalously low hydrogen atom concentration in the decomposition of ammonia must be abandoned. In order to explain this important discrepancy some new experimental techniques require to be developed which will settle the matter without appeal to further hypotheses. There are two general explanations of the discrepancy: (1) the hydrogen atoms are not produced as fast as that calculated on the assumption that every ammonia molecule absorbing a quantum necessarily decomposes, (2) that some entity not yet recognized removes hydrogen atoms at a rate faster than that at which they normally recombine. In this paper methods will be described in which these two problems are solved, and finally there is a discussion of the photochemistry of ammonia in the light of the new results obtained during these experiments.

Addition of Trichloromethyl Radicals to Alkenes: The Use of Phosphites as Hydrogen-Atom Donors in Intermolecular Radical Reactions

Synlett ◽  
2001 ◽  
Vol 2001 (11) ◽  
pp. 1719-1722 ◽  
Author(s):  
Jenny M. Barks ◽  
Bruce C. Gilbert ◽  
Andrew F. Parsons ◽  
Bala Upeandran
Keyword(s):  
Hydrogen Atom ◽  
Radical Reactions

scholarly journals Relationship between the Behavior of Hydrogen and Hydrogen Bubble Nucleation in Vanadium

Materials ◽  
2020 ◽  
Vol 13 (2) ◽  
pp. 322
Author(s):  
Zhengxiong Su ◽  
Sheng Wang ◽  
Chenyang Lu ◽  
Qing Peng
Keyword(s):  
Hydrogen Atom ◽  
First Principles ◽  
Bound States ◽  
Hydrogen Molecule ◽  
Vacancy Cluster ◽  
Bubble Nucleation ◽  
Hydrogen Bubble ◽  
First Principles Calculations ◽  
Hydrogen Atoms ◽  
Macroscopic Deformation

Hydrogen plays a significant role in the microstructure evolution and macroscopic deformation of materials, causing swelling and surface blistering to reduce service life. In the present work, the atomistic mechanisms of hydrogen bubble nucleation in vanadium were studied by first-principles calculations. The interstitial hydrogen atoms cannot form significant bound states with other hydrogen atoms in bulk vanadium, which explains the absence of hydrogen self-clustering from the experiments. To find the possible origin of hydrogen bubble in vanadium, we explored the minimum sizes of a vacancy cluster in vanadium for the formation of hydrogen molecule. We show that a freestanding hydrogen molecule can form and remain relatively stable in the center of a 54-hydrogen atom saturated 27-vacancy cluster.

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