Tetrabutylammonium Bromide

2021 ◽  
Keyword(s):  
Tetrabutylammonium Bromide

Use of Nafion membranes in laboratory organic electrosynthesis

1988 ◽  
Vol 53 (12) ◽  
pp. 3164-3170 ◽  
Author(s):  
Jaromír Hlavatý ◽  
Jiří Volke
Keyword(s):  
Glassy Carbon ◽  
Quaternary Ammonium ◽  
Tetrabutylammonium Bromide ◽  
Nafion Membrane ◽  
Carbon Anode ◽  
Tetrabutylammonium Hydroxide ◽  
Nafion Membranes ◽  
Divided Cell ◽  
A Cell ◽  
Tetrabutylammonium Iodide

Electrolysis of quaternary ammonium bromides and iodides in a divided cell with a Nafion membrane yields quaternary polyhalogenides at a carbon anode in water-ethanolic anolytes. The electrodialysis of tetrabutylammonium iodide in a cell with a Nafion membrane enables generation of tetrabutylammonium hydroxide. In electrolytic reduction of nitrobenzene in presence of 1,3-dibromopropane, N-phenylisooxazolidine results in an approx. 60% yield. This electrosynthesis takes place in dimethylformamide with tetrabutylammonium bromide at a glassy-carbon cathode in a divided cell. In the electroreduction of lobelanine hydrogensulfate in a divided cell in acid water-ethanolic media at a lead cathode prevalently lobelanidine has been obtained.

Investigation of tetrabutylammonium bromide-glycerol-based deep eutectic solvents and their mixtures with water by spectroscopic techniques

2021 ◽  
Vol 330 ◽  
pp. 115617
Author(s):  
Renáta Chromá ◽  
Mária Vilková ◽  
Ivan Shepa ◽  
Patrycja Makoś-Chełstowska ◽  
Vasil Andruch
Keyword(s):  
Tetrabutylammonium Bromide ◽  
Deep Eutectic Solvents ◽  
Spectroscopic Techniques

scholarly journals Effect of Electrical Injection of Corrosion Inhibitor on the Corrosion of Steel Rebar in Chloride-Contaminated Repair Mortar

2015 ◽  
Vol 2015 ◽  
pp. 1-10 ◽  
Author(s):  
The Huyen Nguyen ◽  
Tuan Anh Nguyen ◽  
Thien Vuong Nguyen ◽  
Van Khu Le ◽  
Thi Mai Thanh Dinh ◽  
...  
Keyword(s):  
Current Density ◽  
Cement Mortar ◽  
Tetrabutylammonium Bromide ◽  
Electrical Current ◽  
Corrosion Current ◽  
Sodium Borate ◽  
Apparent Diffusion Coefficients ◽  
Steel Rebar ◽  
Repair Mortar ◽  
Vis Spectroscopy

The electrical rehabilitation treatments of repair mortar were performed with tetrabutylammonium bromide salt (TBAB) at an electrical current density of 5 A/m2, using two electrolytes (0.1 M NaOH and 0.1 M Na3BO3solutions), and for two time periods (1 and 4 weeks), respectively. The average organic cation-based inhibitor’s concentration in cement mortars before and after this treatment was quantified using the UV-Vis spectroscopy. The experimental results reveal that the EICI treatment with 0.1 M Na3BO3was more effective in injecting the inhibitor and in improving the chloride penetration resistance and compressive strength of the mortar, relative to using 0.1 M NaOH as electrolyte. In this case, after the 4-week EICI treatment, [TBA+] contents were 2.3 % and 2.4% by mass of cement mortar for uncontaminated and salt-contaminated mortars, respectively. After the 4-week EICI treatment, the apparent diffusion coefficients of chloride anion in cement mortar were decreased by 40% from 1.52 × 10−10 m2/s. The EICI treatment was able to halt the chloride-induced corrosion of the steel rebar by promoting its passivation. The 2-week EICI treatment using sodium hydroxide and sodium borate solutions decreased the corrosion current density of the rebar by 77.8% and 78.5%, respectively, approximately two months after the treatment.

scholarly journals Crystal structures of the 2:2 complex of 1,1′-(1,2-phenylene)bis(3-m-tolylurea) and tetrabutylammonium chloride or bromide

2017 ◽  
Vol 73 (9) ◽  
pp. 1316-1319 ◽  
Author(s):  
Chao Huang ◽  
Ruyu Wang ◽  
Xi Shu ◽  
Yu Fan ◽  
Yue Qi ◽  
...  
Keyword(s):  
Crystal Structures ◽  
Dihedral Angle ◽  
Ionic Radius ◽  
Tetrabutylammonium Bromide ◽  
Urea Molecule ◽  
Halide Anion ◽  
Halide Anions ◽  
Receptor Sites ◽  
Tetrabutylammonium Chloride

The title compounds, tetrabutylammonium chloride–1,1′-(1,2-phenylene)bis(3-m-tolylurea) (1/1), C16H36N+·Cl−·C22H22N4O2or [(n-Bu4N+·Cl−)(C22H22N4O2)] (I) and tetrabutylammonium bromide–1,1′-(1,2-phenylene)bis(3-m-tolylurea) (1/1), C16H36N+·Br−·C22H22N4O2or [(n-Bu4N+·Br−)(C22H22N4O2)] (II), both comprise a tetrabutylammonium cation, a halide anion and anortho-phenylene bis-urea molecule. Each halide ion shows four N—H...X(X= Cl or Br) interactions with two urea receptor sites of different bis-urea moieties. A crystallographic inversion centre leads to the formation of a 2:2 arrangement of two halide anions and two bis-urea molecules. In the crystals, the dihedral angle between the two urea groups of the bis-urea molecule in (I) [defined by the four N atoms, 165.4 (2)°] is slightly smaller than that in (II) [167.4 (2)°], which is probably due to the smaller ionic radius of chloride compared to bromide.

Enthalpies of solution of two Meisenheimer σ-adducts and tetrabutylammonium bromide in DMSO

2003 ◽  
Vol 406 (1-2) ◽  
pp. 185-190 ◽  
Author(s):  
Andrey V Kustov ◽  
Elena N Alifanova ◽  
Olga Yu Lapina ◽  
Valeriy P Korolev
Keyword(s):  
Tetrabutylammonium Bromide ◽  
Enthalpies Of Solution

scholarly journals An Ultrasound Assessed Extraction Combined with Ion-Pair HPLC Method and Risk Assessment of Nitrite and Nitrate in Cured Meat

2018 ◽  
Vol 2018 ◽  
pp. 1-6 ◽  
Author(s):  
Babiker Yagoub Abdulkair ◽  
Amin O. Elzupir ◽  
Abdulaziz S. Alamer
Keyword(s):  
Risk Assessment ◽  
Tetrabutylammonium Bromide ◽  
Meat Products ◽  
Correlation Coefficients ◽  
Dietary Exposure ◽  
Hplc Method ◽  
Processed Meat ◽  
Disodium Hydrogen Phosphate ◽  
Cured Meat

An accurate IPC-UV method was developed and validated for the determination of nitrite (NI) and nitrate (NA) in meat products. The best separation was achieved on a phenyl-hexyl column (150 mm × 4.6 mm, 3 µm) with a mobile phase composed of 25% acetonitrile and 75% buffer (2 mM disodium hydrogen phosphate and 3 mM tetrabutylammonium bromide, pH = 4). Eluents were monitored at 205 nm. Linearity ranges were 1.86 × 10−6–7.5 µg·ml−1 and 0.09–5.0 µg·ml−1 for NI and NA, respectively. The correlation coefficients were greater than 0.999 for NI and NA. This method was applied to a number of processed meat products in Riyadh (n = 155). NI ranged from 1.78 to 129.69 mg·kg−1, and NA ranged from 0.76 to 96.64 mg·kg−1. Results showed extensive use of NI and NA; however, concentrations were within the legal limit of Saudi Arabia except for one sample. Further, the risk assessment and dietary exposure have been estimated for both NI and NA.

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