M.W=350-400 Archives - Page 14 of 17 - Bromides-buliding-blocks

Zerbe, Jerzy’s team published research in Chemia Analityczna (Warsaw) in 45 | CAS: 518-67-2

Chemia Analityczna (Warsaw) published new progress about 518-67-2. 518-67-2 belongs to bromides-buliding-blocks, auxiliary class Other Aromatic Heterocyclic,Salt,Amine,Benzene, name is Dimidium bromide, and the molecular formula is C13H15NO6S, Product Details of C20H18BrN3.

Zerbe, Jerzy published the artcileA fast manual method for determination of anionic surfactants in water samples, Product Details of C20H18BrN3, the publication is Chemia Analityczna (Warsaw) (2000), 45(4), 595-599, database is CAplus.

Results of investigation on the determination of anionic surfactants (AS) in water samples by means of color reaction based on the reaction of AS with mixed indicator dimidium bromide-disulfine blue and spectrophotometric measurements of the absorbance at 525 nm are presented. In properly selected anal. conditions limits of AS detection in the procedure is 0.07 mg l^-1. This enables the use of the method in monitoring or quality control of the natural and drinking water.

Referemce:
https://en.wikipedia.org/wiki/Bromide,
bromide – Wiktionary

Teichmann, Marcus’s team published research in Synthesis in | CAS: 111865-47-5

Synthesis published new progress about 111865-47-5. 111865-47-5 belongs to bromides-buliding-blocks, auxiliary class Benzenes, name is Mono(N,N,N-trimethyl-1-phenylmethanaminium) tribromide, and the molecular formula is C6H12N2O, Application of Mono(N,N,N-trimethyl-1-phenylmethanaminium) tribromide.

Teichmann, Marcus published the artcileBromination of 1,5-anhydrohex-1-enitols (glycals) using quaternary ammonium tribromides as bromine donors: synthesis of α-1,2-trans-2-bromo-2-deoxyglycopyranosyl bromides and fluorides, Application of Mono(N,N,N-trimethyl-1-phenylmethanaminium) tribromide, the publication is Synthesis (1993), 889-94, database is CAplus.

Addition of bromine to glycals using quaternary ammonium tribromides as bromine donors is realized with higher stereoselectivities (α-1,2-trans configurated products) compared to bromination with mol. bromine. The reaction is neither sensitive to the solvent nor to the nature of the protecting groups (acetyl, benzoyl, benzyl) of the glycals and very slightly affected by the orientation of the substituents of the different glycals. Some of the α-1,2-trans dibromo adducts have been isolated in 60-75% yields and transformed into the corresponding α-1,2-trans-2-bromo-2-deoxyglycopyranosyl fluorides.

Referemce:
https://en.wikipedia.org/wiki/Bromide,
bromide – Wiktionary

Dey, Madhudeepa’s team published research in Chemistry Letters in 43 | CAS: 111865-47-5

Chemistry Letters published new progress about 111865-47-5. 111865-47-5 belongs to bromides-buliding-blocks, auxiliary class Benzenes, name is Mono(N,N,N-trimethyl-1-phenylmethanaminium) tribromide, and the molecular formula is C10H16Br3N, Computed Properties of 111865-47-5.

Dey, Madhudeepa published the artcileSodium hypochlorite-promoted novel synthesis of organic ammonium tribromides and application of phenanthroline hydrotribromide in chemoselective oxidation of organic sulfides by hydrogen peroxide, Computed Properties of 111865-47-5, the publication is Chemistry Letters (2014), 43(5), 631-633, database is CAplus.

A novel method of synthesis of organic ammonium tribromides (OATBs) is developed by using an inexpensive and eco-friendly sodium hypochlorite as oxidant for conversion of Br^– to Br₃^–. The OATBs thus prepared include both quaternary ammonium tribromides and N-heterocyclic tribromides. A new addition to the family of OATBs is made in the form of phenanthroline hydrotribromide. The efficacy of this new tribromide as catalyst is ascertained in the oxidative transformation of organic sulfides to their corresponding sulfoxides and sulfones by hydrogen peroxide.

Referemce:
https://en.wikipedia.org/wiki/Bromide,
bromide – Wiktionary

Dey, Madhudeepa’s team published research in Synthetic Communications in 43 | CAS: 111865-47-5

Synthetic Communications published new progress about 111865-47-5. 111865-47-5 belongs to bromides-buliding-blocks, auxiliary class Benzenes, name is Mono(N,N,N-trimethyl-1-phenylmethanaminium) tribromide, and the molecular formula is C10H16Br3N, Application In Synthesis of 111865-47-5.

Dey, Madhudeepa published the artcileNovel method of synthesis of quaternary ammonium tribromides and investigation of catalytic role of benzyltrimethylammonium tribromide in oxidation of alcohols to carbonyl compounds, Application In Synthesis of 111865-47-5, the publication is Synthetic Communications (2013), 43(12), 1734-1742, database is CAplus.

Stable crystalline organic quaternary ammonium tribromides (QATBs) were easily synthesized by the oxidation of the corresponding organic ammonium bromides (QABs) with ammonium persulfate. The reactions were performed under solvent-free conditions in presence of sulfuric acid and silica as supporting agent. Two equivalents of potassium bromide were used as the source of addnl. bromides for quant. conversion of QABs to QATBs. Ammonium persulfate, a cheap and readily available oxidant carries out the bromide oxidation to tribromide very effectively under solvent-free conditions. The synthesized QATBs catalyzed the oxidation of alcs. to carbonyl compounds with hydrogen peroxide as oxidant in high yields under mild reaction conditions.

Referemce:
https://en.wikipedia.org/wiki/Bromide,
bromide – Wiktionary

Dey, Madhudeepa’s team published research in Green Chemistry Letters and Reviews in 5 | CAS: 111865-47-5

Green Chemistry Letters and Reviews published new progress about 111865-47-5. 111865-47-5 belongs to bromides-buliding-blocks, auxiliary class Benzenes, name is Mono(N,N,N-trimethyl-1-phenylmethanaminium) tribromide, and the molecular formula is C10H16Br3N, Recommanded Product: Mono(N,N,N-trimethyl-1-phenylmethanaminium) tribromide.

Dey, Madhudeepa published the artcileSynthesis of quaternary ammonium tribromides. A novel green approach, Recommanded Product: Mono(N,N,N-trimethyl-1-phenylmethanaminium) tribromide, the publication is Green Chemistry Letters and Reviews (2012), 5(4), 639-642, database is CAplus.

Potassium permanganate (KMnO₄) oxidizes quaternary ammonium bromides to the corresponding tribromides conveniently and effectively. The procedure carried out solvent-free and adopted as environmentally friendly. High purity, excellent yield, shorter reaction time and mild reaction conditions are some of the advantages of this synthetic protocol. The efficacy of quaternary ammonium tribromides, especially benzyltrimethylammonium tribromide, was also studied for bromination of some organic substrates.

Referemce:
https://en.wikipedia.org/wiki/Bromide,
bromide – Wiktionary

Yuan, Jia-cheng’s team published research in Huaxue Shijie in 52 | CAS: 111865-47-5

Huaxue Shijie published new progress about 111865-47-5. 111865-47-5 belongs to bromides-buliding-blocks, auxiliary class Benzenes, name is Mono(N,N,N-trimethyl-1-phenylmethanaminium) tribromide, and the molecular formula is C12H20O6, Application In Synthesis of 111865-47-5.

Yuan, Jia-cheng published the artcileSynthesis of 2-bromo-4-methoxyaniline in ionic liquid, Application In Synthesis of 111865-47-5, the publication is Huaxue Shijie (2011), 52(12), 747-750, database is CAplus.

A method for synthesis of 2-bromo-4-methoxyaniline in ionic liquid was introduced. The title compound was prepared from p-methoxyaniline through bromination. The 2-bromo-4-methoxyaniline was obtained in 98.2% yield and 99.5% purity. The effect of various brominating agents and their amounts, reaction temperature and reaction time on the bromination reaction was investigated. The new procedure for preparing 2-bromo-4-methoxyaniline has the advantages of easy source of material, good yield, simple operation and environmental benignity. Ionic liquid can be reused.

Referemce:
https://en.wikipedia.org/wiki/Bromide,
bromide – Wiktionary

Orthgiess, Erhard’s team published research in Tenside, Surfactants, Detergents in 27 | CAS: 518-67-2

Tenside, Surfactants, Detergents published new progress about 518-67-2. 518-67-2 belongs to bromides-buliding-blocks, auxiliary class Other Aromatic Heterocyclic,Salt,Amine,Benzene, name is Dimidium bromide, and the molecular formula is C20H18BrN3, Application of Dimidium bromide.

Orthgiess, Erhard published the artcileColorimetric determination of anionic surfactants, Application of Dimidium bromide, the publication is Tenside, Surfactants, Detergents (1990), 27(4), 226-8, database is CAplus.

A method for the determination of anionic surfactants such as alkyl- and alkylarylsulfates, -sulfonates, and -sulfosuccinates in aqueous solutions is based on the absorbance measurement of surfactant-dye (i.e., 3,8-diamino-5-methyl-6-phenylphenanthridinium bromide) complexes at 525 nm. The technique is simpler and faster than other colorimetric methods and can be used for the anal. of 1 × 10^-4 to 5 × 10^-7 M solutions

Referemce:
https://en.wikipedia.org/wiki/Bromide,
bromide – Wiktionary

Doerr, Alicia M.’s team published research in ACS Catalysis in 12 | CAS: 111865-47-5

ACS Catalysis published new progress about 111865-47-5. 111865-47-5 belongs to bromides-buliding-blocks, auxiliary class Benzenes, name is Mono(N,N,N-trimethyl-1-phenylmethanaminium) tribromide, and the molecular formula is C10H16Br3N, Computed Properties of 111865-47-5.

Doerr, Alicia M. published the artcileRedox Potential as a Predictor of Polyethylene Branching Using Nickel α-Diimine Catalysts, Computed Properties of 111865-47-5, the publication is ACS Catalysis (2022), 12(1), 73-81, database is CAplus.

The ability to control polyethylene branching d. is of great interest as a means by which a polymer’s thermomech. properties may be tailored. One particularly interesting way in which this can be achieved is by altering the electronic characteristics of Pd- and Ni-based α-diimine catalysts through the inclusion of electron-withdrawing or electron-donating substituents onto the ligand scaffold; however, a few critical fundamental studies are absent from the literature. These include a systematic examination of electronic perturbations of Ni-based α-diimine catalysts, as well as how placement of donating or withdrawing substituents on the backbone vs. N-aryl moieties of the α-diimine ligand framework impact polymer topol. In addition, no method currently exists by which the polymer topol. may be predicted based on an intrinsic characteristic of the (pre)catalyst or ligand without requiring extensive polymerization studies. Herein, the authors use both exptl. and computational methods to understand how the placement of electron-donating or electron-withdrawing substituents on Ni α-diimine catalysts affects PE branching d., and compare those results to the analogous unsubstituted catalyst. Inclusion of electron-withdrawing substituents decreases resultant PE branching d., whereas electron-donating substituents exhibit little to no change in PE branching d. Finally, as the placement and identity of donating or withdrawing substituents are varied, so too is the redox half-wave potential (E_1/2) of the precatalysts, which can be used to generate a predictive curve by which PE branching d. may be estimated for other substituted Ni-based α-diimine catalysts without the need for extensive polymerization studies.

Referemce:
https://en.wikipedia.org/wiki/Bromide,
bromide – Wiktionary

Braun, Aleksander’s team published research in Biuletyn Informacyiny: Barwniki, Srodki Pomocnicze in 25 | CAS: 518-67-2

Biuletyn Informacyiny: Barwniki, Srodki Pomocnicze published new progress about 518-67-2. 518-67-2 belongs to bromides-buliding-blocks, auxiliary class Other Aromatic Heterocyclic,Salt,Amine,Benzene, name is Dimidium bromide, and the molecular formula is C20H18BrN3, SDS of cas: 518-67-2.

Braun, Aleksander published the artcileQuantitative determination of cationic surfactants by two-phase titration, SDS of cas: 518-67-2, the publication is Biuletyn Informacyiny: Barwniki, Srodki Pomocnicze (1981), 25(3), 73-6, database is CAplus.

Better reproducibility of the results was obtained in two-phase (H₂O-CHCl₃) titration of cationic surfactants (octadecyltrimethylammonium chloride [112-03-8], etc.) with solution of lauryl sodium sulfate [151-21-3] in the presence of mixed indicator Disulfine Blue VN150 [129-17-9]–Dimidium bromide [518-67-2] than in the presence of methylene blue [61-73-4]. The mechanism of color change and exptl. procedure were discussed.

Referemce:
https://en.wikipedia.org/wiki/Bromide,
bromide – Wiktionary

Korber, Nikolaus’s team published research in Angewandte Chemie, International Edition in English in 35 | CAS: 111865-47-5

Angewandte Chemie, International Edition in English published new progress about 111865-47-5. 111865-47-5 belongs to bromides-buliding-blocks, auxiliary class Benzenes, name is Mono(N,N,N-trimethyl-1-phenylmethanaminium) tribromide, and the molecular formula is C10H16Br3N, Category: bromides-buliding-blocks.

Korber, Nikolaus published the artcileDirected synthesis of stable hydrogen polyphosphides: preparation and structural characterization of HP₁₁^2- in (NBnMe₃)₂HP₁₁ and (PBnPh₃)₂HP₁₁ as well as its comparison with the first “naked” P₁₁^3- ion in (NEtMe₃)₃P₁₁, Category: bromides-buliding-blocks, the publication is Angewandte Chemie, International Edition in English (1996), 35(10), 1107-1110, database is CAplus.

Directed synthetic routes to hydrogen polyphosphides by soft protonation of an alkali metal polyphosphide were investigated. Precise conditions for the protonation reaction were crucial; only reaction conditions that produced the acid in situ resulted in quant. and reproducable yields. Thus, reaction of Cs₃P₁₁ with benzyltrimethylammonium tribromide in NH₃(l) afforded (PhCH₂NMe₃)₂HP₁₁ in 94% yield. The structure of (PhCH₂NMe₃)₂HP₁₁ was determined by x-ray crystallog. Reaction of Cs₃P₁₁ with [EtNMe₃]I or [PhCH₂NPh₃]Br in NH₃(l) afforded (EtNMe₃)₃P₁₁ and (Ph₃PCH₂Ph)₂HP₁₁, resp. In the latter reaction, [PhCH₂NPh₃]Br acted as a weak proton donor.

Referemce:
https://en.wikipedia.org/wiki/Bromide,
bromide – Wiktionary