The Kinetics of the Ethanolysis Reaction of Some 4-Nitro-substituted Triphenylmethyl Chlorides

1973 ◽  
Vol 51 (5) ◽  
pp. 687-693 ◽  
Author(s):  
Eleanor L. Kulin ◽  
K. T. Leffek
Keyword(s):  
Ammonium Salt ◽  
Quaternary Ammonium ◽  
Quaternary Ammonium Salt ◽  
Activation Parameters ◽  
Ion Pair ◽  
Solvent Composition ◽  
Substrate Structure ◽  
Carbonium Ion ◽  
Kinetics Of

The kinetics of the ethanolysis of three triphenylmethyl chlorides, the 4-nitro, 4,4′-dinitro, and 4,4′,4″-trinitrophenylmethyl compounds, have been studied. The effect of change in substrate and solvent composition on the activation parameters, ΔH≠ and ΔS≠, has been determined. For these compounds, ΔH≠ appears to be controlled by substrate structure while ΔS≠varies predominantly with solvent composition.The attempted reaction of pyridine with 4,4′,4″-trinitrophenylmethyl chloride to form the quaternary ammonium salt is also reported.The reactions are interpreted to be proceeding via a carbonium ion-pair mechanism.

Instability of Solutions of Quaternary Ammonium Permanganates in Dichloromethane

1997 ◽  
Vol 62 (6) ◽  
pp. 849-854 ◽  
Author(s):  
Vladislav Holba ◽  
Renata Košická
Keyword(s):  
Ammonium Salt ◽  
Rate Constants ◽  
Quaternary Ammonium ◽  
Quaternary Ammonium Salt ◽  
Activation Parameters ◽  
The Stability

The paper deals with instability of solutions of quaternary ammonium permanganates, QMnO4 (Q = tetraethyl-, tetra-1-propyl-, tetra-1-butyl-, tetra-1-pentyl-, tetra-1-octyl-, and cetyltrimethylammonium), in dichloromethane and presents the rate constants and activation parameters of the reduction of permanganate. Attention was paid to the properties of colloidal Mn(IV) intermediate. The stability of the solutions depends markedly on the quaternary ammonium salt used.

KINETICS OF LACTIC ACID EXTRACTION WITH QUATERNARY AMMONIUM SALT

2001 ◽  
Vol 36 (13) ◽  
pp. 2927-2943 ◽  
Author(s):  
Misato Hironaka ◽  
Makoto Hirata ◽  
Hirokazu Takanashi ◽  
Tadashi Hano ◽  
Shigenobu Miura
Keyword(s):  
Lactic Acid ◽  
Ammonium Salt ◽  
Quaternary Ammonium ◽  
Quaternary Ammonium Salt ◽  
Acid Extraction ◽  
Kinetics Of

Catalyst- and oxidant-free electrochemical para-selective hydroxylation of N-arylamides in batch and continuous-flow

2020 ◽  
Vol 22 (19) ◽  
pp. 6437-6443
Author(s):  
Cheng-Kou Liu ◽  
Meng-Yi Chen ◽  
Xin-Xin Lin ◽  
Zheng Fang ◽  
Kai Guo
Keyword(s):  
Ammonium Salt ◽  
Quaternary Ammonium ◽  
Continuous Flow ◽  
Quaternary Ammonium Salt ◽  
Selective Hydroxylation

A catalyst-, oxidant-, acidic solvent- and quaternary ammonium salt-free electrochemical para-selective hydroxylation of N-arylamides at rt in batch and continuous-flow was developed.

Synthesis and Performance of Polyoxy-ethylene Ester Quaternary Ammonium Salt

2013 ◽  
Vol 50 (1) ◽  
pp. 9-13 ◽  
Author(s):  
Yong-Qiang Sun ◽  
Wen-Jing Li ◽  
Wan-Xu Wang ◽  
Qiu-Xiao Li ◽  
Wieslaw Hreczuch ◽  
...  
Keyword(s):  
Ammonium Salt ◽  
Quaternary Ammonium ◽  
Quaternary Ammonium Salt ◽  
And Performance

Systematic exploration of quaternary ammonium salt adsorption on oxidized coal based on experiments and MD simulations

Fuel ◽  
2021 ◽  
Vol 287 ◽  
pp. 119434
Author(s):  
Jun Chen ◽  
Hongliang Li ◽  
Chunfu Liu ◽  
Lingyun Liu ◽  
Yu Sun ◽  
...  
Keyword(s):  
Ammonium Salt ◽  
Quaternary Ammonium ◽  
Quaternary Ammonium Salt ◽  
Md Simulations ◽  
Oxidized Coal ◽  
Systematic Exploration
Sign in / Sign up

Export Citation Format

Share Document