Molecular halogen elimination from halogen-containing compounds in the atmosphere

2014 ◽  
Vol 16 (16) ◽  
pp. 7184 ◽  
Author(s):  
King-Chuen Lin ◽  
Po-Yu Tsai
Keyword(s):  
Halogen Elimination

Mechanism of electron impact ionization-induced halogen elimination from 2-methyl-2-bromosuccinates

1993 ◽  
Vol 28 (3) ◽  
pp. 230-234 ◽  
Author(s):  
D. Bornstein ◽  
A. Mandelbaum ◽  
I. Vidavsky ◽  
B. Domon ◽  
D. R. Mueller ◽  
...  
Keyword(s):  
Electron Impact ◽  
Impact Ionization ◽  
Electron Impact Ionization ◽  
Halogen Elimination

Regio-selective cyanation of ( Z )-(1,2-dibromo-2-arylvinyl)triisopropylsilane with suppression of halogen elimination

2017 ◽  
Vol 58 (19) ◽  
pp. 1842-1845 ◽  
Author(s):  
Naoki Endo ◽  
Kazunari Goto ◽  
Koshi Murakami ◽  
Tetsuo Iwasawa
Keyword(s):  
Halogen Elimination

scholarly journals Structural Dynamics of C2F4I2 in Cyclohexane Studied via Time-Resolved X-ray Liquidography

2021 ◽  
Vol 22 (18) ◽  
pp. 9793
Author(s):  
Jain Gu ◽  
Seonggon Lee ◽  
Seunghwan Eom ◽  
Hosung Ki ◽  
Eun Hyuk Choi ◽  
...  
Keyword(s):  
Reaction Dynamics ◽  
Molecular Structures ◽  
Solution Phase ◽  
Reaction Pathways ◽  
Time Resolved ◽  
Solvent Interactions ◽  
X Ray ◽  
Exchange Correlation ◽  
Solvent Dependence ◽  
Halogen Elimination

The halogen elimination of 1,2-diiodoethane (C2H4I2) and 1,2-diiodotetrafluoroethane (C2F4I2) serves as a model reaction for investigating the influence of fluorination on reaction dynamics and solute–solvent interactions in solution-phase reactions. While the kinetics and reaction pathways of the halogen elimination reaction of C2H4I2 were reported to vary substantially depending on the solvent, the solvent effects on the photodissociation of C2F4I2 remain to be explored, as its reaction dynamics have only been studied in methanol. Here, to investigate the solvent dependence, we conducted a time-resolved X-ray liquidography (TRXL) experiment on C2F4I2 in cyclohexane. The data revealed that (ⅰ) the solvent dependence of the photoreaction of C2F4I2 is not as strong as that observed for C2H4I2, and (ⅱ) the nongeminate recombination leading to the formation of I2 is slower in cyclohexane than in methanol. We also show that the molecular structures of the relevant species determined from the structural analysis of TRXL data provide an excellent benchmark for DFT calculations, especially for investigating the relevance of exchange-correlation functionals used for the structural optimization of haloalkanes. This study demonstrates that TRXL is a powerful technique to study solvent dependence in the solution phase.

Bis(phenylsulfonyl)methane mediated synthesis of olefins via a halogen elimination and double bond migration

2018 ◽  
Vol 16 (15) ◽  
pp. 2619-2622
Author(s):  
Jing Jiang ◽  
Ying Hu ◽  
Xin Cai ◽  
Liudi Wang ◽  
Yanwei Hu ◽  
...  
Keyword(s):  
Double Bond ◽  
Building Blocks ◽  
Double Bond Migration ◽  
Halogen Elimination

An effective dehydrochlorination of bis(phenylsulfonyl)alkane to prepare alkene building blocks is developed.

A reaction path for halogen elimination from CX2Y2, and its dynamical implications

1981 ◽  
Vol 85 (26) ◽  
pp. 4046-4051 ◽  
Author(s):  
Stephen R. Cain ◽  
Roald Hoffmann ◽  
Edward R. Grant
Keyword(s):  
Reaction Path ◽  
Halogen Elimination

Triazine Elastomers

1966 ◽  
Vol 39 (4) ◽  
pp. 1178-1183 ◽  
Author(s):  
W. R. Griffin
Keyword(s):  
Molecular Weight ◽  
Hydraulic Systems ◽  
High Molecular Weight Polymer ◽  
Molecular Weight Polymer ◽  
Addition Polymerization ◽  
Hydraulic Fluids ◽  
Low Temperature Flexibility ◽  
Halogen Elimination ◽  
Large Research

Abstract Three technically feasible routes have now been established for preparation of linear perfluoroalkylene triazine polymers. The most advanced route is based on addition polymerization of long chain fluorocarbon dinitriles and diamidines, followed by acylation and cyclodehydration to triazine polymer. Large research samples have been made, but crosslinking to thermally stable vulcanizates is still a problem. An alternate method, active halogen elimination from a difunctional fluorotriazine monomer, has been, demonstrated. High molecular weight polymer has been formed, but it is not elastomeric at room temperature. The low temperature flexibility is a function of structure and not of the method of polymerization, therefore other monomers with longer fluoroalkyl groups hold promise of elastomeric products. The route has attractive economics, but elastomeric products with crosslinking capability must be demonstrated. Coupling of diiodofluoroalkyl triazine monomers employing ultraviolet radiation has been demonstrated. This route is not being pursued because of research required and the predicted high cost of monomer preparation, when compared to the previous two routes. Evaluations of compounded vulcanized triazine elastomer show excellent resistance to hydrocarbon fuels and hydraulic fluids at 370° C and to long term air aging at 300° C. Tensile strength is in the 500 psi range, but is expected to improve with closer control of molecular weight and branching of the polymer. Excellent prospects are in view for fuel tank sealants, wire insulation and elastomer components for hydraulic systems useful in the 300° to 400° C range.

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