煤演化过程中ＴＨＦ可溶低分子化合物组成及 化学结构变化机制 孙泽源１，张小东１，２，张㊀硕１，刘㊀晓１，２，衡㊀帅１，２ （１．河南理工大学能源科学与工程学院，河南焦作㊀４５４０００；２．中原经济区煤层（页岩）气河南省协同创新中心，河南焦作㊀４５４０００）摘㊀要：煤是由有机质和少量矿...
The use of THF as the solvent is critical for successful reactions. The proposed mechanism of radical initiation involves the photosensitized formation of a triplet sulfonyl nitrene, which abstracts a hydrogen atom from THF to give a tetrahydrofuran- 2-yl radical, which then reacts with the ...
Provide a mechanism that explains why this might be so. [See Figure 11.48 for the structure of BHT.]<IMAGE> Verified step by step guidance 1 Identify the role of tetrahydrofuran (THF) as a solvent in organic reactions, noting its susceptibility to oxid...
A short preliminary account of a part of this work has been published in [8]. As is known, alkali metals (Na, K), their adducts with polycyclic aromatic hydrocarbons (in the absence of a solvating solvent) as well as graphite–potassium systems are also able to catalyze the alkylation ...
We found that, the polar aprotic, low boiling, high cavitation energy solvent system EtOH–THF is useful for the present sonic reaction [31], [32], [33]. 5. Mechanism The best result was obtained by using 0.8 equivalents (2 mg atom) of atomized sodium, and the use of 0.2 equivalents...
The effect of other alternative catalysts such as metal halides, which have shown better performance than the traditional catalysts such as mineral acids, was also studied. Further, to help us give an insight on the reaction mechanism using different catalysts, we developed a kinetic model ...
Kinetics and mechanism of the cationic polymerization of tetrahydrofuran in solution. I. THF–CCI4 systemPolymerization of THF in CCl4 solvent was initiated with 1,3-dioxolan-2-ylium eations with AsF6−, PF6−, and SbF6− anions as well as with esters of fluorosulfonic and trifluoro...
Thisresearch aims to elucidate the mechanism controlling the MI transition. Imaedaetal. extended the number of compounds in this family by changing solventmolecules and counter anions and proposed the role of disorder of the solventmolecules in the MI transition.10In a previouspaper,11we extended ...
The metallic sample dissolution rate was estimated as a function of the coordinating solvent nature. The development of the metal surface oxidation was established to lead to a significant increase of surface roughness. This phenomenon can be explained by the fact that different parts of the surface...
Both the concerted mechanism (with a four-center transition state (TS)) and the stepwise one (occurring via a betaine-type zwitterionic intermediate) have been explored, examining the potential energy profiles as well as the free energy ones. The solvent effect in the integral equation formalism-...