Tag: 200-300

Majhi, Debashis; Dvinskikh, Sergey V. published their research in Scientific Reports in 2021. The article was titled 《Ion conformation and orientational order in a dicationic ionic liquid crystal studied by solid-state nuclear magnetic resonance spectroscopy》.Recommanded Product: 1,6-Dibromohexane The article contains the following contents:

Ionic liquids crystals belong to a special class of ionic liquids that exhibit thermotropic liquid-crystalline behavior. Recently, dicationic ionic liquid crystals have been reported with a cation containing two single-charged ions covalently linked by a spacer. In ionic liquid crystals, electrostatic and hydrogen bonding interactions in ionic sublayer and van der Waals interaction in hydrophobic domains are the main forces contributing to the mesophase stabilization and determining the mol. orientational order and conformation. How these properties in dicationic materials are compared to those in conventional monocationic analogs. We address this question using a combination of advanced NMR methods and DFT anal. Dicationic salt 3,3′-(1,6-hexanediyl)bis(1-dodecylimidazolium)dibromide was studied. Local bond order parameters of flexible alkyl side chains, linker chain, and alignment of rigid polar groups were analyzed. The dynamic spacer effectively “”decouples”” the motion of two ionic moieties. Hence, local order and alignment in dicationic mesophase were similar to those in analogous single-chain monocationic salts. Bond order parameters in the side chains in the dicationic smectic phase were found consistently lower compared to double-chain monocationic analogs, suggesting decreasing contribution of van der Waals forces. Overall dication reorientation in the smectic phase was characterized by low values of orientational order parameter S. With increased interaction energy in the polar domain the layered structure is stabilized despite less ordered dications. The results emphasized the trends in the orientational order in ionic liquid crystals and contributed to a better understanding of interparticle interactions driving smectic assembly in this and analogous ionic mesogens. In addition to this study using 1,6-Dibromohexane, there are many other studies that have used 1,6-Dibromohexane(cas: 629-03-8Recommanded Product: 1,6-Dibromohexane) was used in this study.

1,6-Dibromohexane(cas: 629-03-8) is generally used to introduce C6 spacer in the molecular architecture. Some of the examples are: synthesis of solvent processable and conductive polyfluorene ionomers for alkaline fuel cell applications; synthesis of cross-linkable regioregular poly(3-(5-hexenyl)thiophene) (P3HNT) for stabilizing the film morphology in polymer photovoltaic cells.Recommanded Product: 1,6-Dibromohexane

Referemce:
Bromide – Wikipedia,
bromide – Wiktionary

Sole, Daniel; Amenta, Arianna; Campos, Cristina; Fernandez, Israel published their research in Dalton Transactions in 2021. The article was titled 《Iron-promoted dealkylative carbene aminocyclization of δ-arylamino-α-diazoesters》.Application of 14660-52-7 The article contains the following contents:

Herein, a novel methodol. to access N-aryl proline derivatives I (R = Ph, 2,4-dimethylphenyl, naphthalen-1-yl, etc.; R1 = Me, Et) using amino-tethered α-diazoesters RN(R2)(CH2)3C(=N2)C(O)OR1 [R2 = Me, Et, i-Pr, t-Bu, Bn] and cheap, readily available iron salts were reported. Mechanistically, the aminocyclization reaction involves the initial formation of an iron-carbene complex followed by a nucleophilic attack of the aniline nitrogen atom to give an ammonium ylide intermediate, which finally undergoes the iron-promoted dealkylation. The results came from multiple reactions, including the reaction of Ethyl 5-bromovalerate(cas: 14660-52-7Application of 14660-52-7)

Ethyl 5-bromovalerate(cas: 14660-52-7) belongs to bromides. Most organobromine compounds, like most organohalide compounds, are relatively nonpolar. Bromine is more electronegative than carbon (2.9 vs 2.5). Consequently, the carbon in a carbon–bromine bond is electrophilic, i.e. alkyl bromides are alkylating agents.Application of 14660-52-7

Referemce:
Bromide – Wikipedia,
bromide – Wiktionary

《Unusual Reactivity of a Thiazole-Based Mn Tricarbonyl Complex for CO2 Activation》 was written by Singh, Kundan K.; Siegler, Maxime A.; Thoi, V. Sara. SDS of cas: 14516-54-2 And the article was included in Organometallics in 2020. The article conveys some information:

2-(2-Pyridyl)benzothiazole (pbt) manganese(I) complex [(pbt)MnBr(CO)3] undergoes chem. and electrochem. reduction, giving Mn(0) dimer [(pbt)2Mn2(CO)6] and Mn(1-) complex. Manganese tricarbonyl complexes have attracted considerable attention as competent electrocatalyst for CO2 reduction owing to their unique chem. and the natural abundance of Mn. While the analogous Re complexes are well-known to activate CO2 under anhydrous conditions, most reported Mn tricarbonyl catalysts require exogenous protons. In an effort to understand the reason for the different CO2 reduction mechanisms, we investigate the reactivity of Mn(pbt)(CO)3Br, (1, where pbt = 2-(2-pyridyl)-benzothiazole) with CO2. Our combined electrochem. and spectroscopic data suggest that 1 can undergo a CO2 conversion to CO similar to Re complexes with and without the presence of a proton source, but only at potentials significantly more neg. than the second reduction Furthermore, the one- and two-electron reduced species are chem. generated and characterized by NMR, UV-vis, and IR spectroscopy. By exploring sequential chem. reduction of 1, we uncover unusual reactivity of the reduced dimeric Mn-Mn species as well as the isolation of a species capable of C-H activation. In the part of experimental materials, we found many familiar compounds, such as Bromopentacarbonylmanganese(I)(cas: 14516-54-2SDS of cas: 14516-54-2)

Bromopentacarbonylmanganese(I)(cas: 14516-54-2) has many other uses. It is used in the formation of (eta6-arene)tricarbonylmanganese(I) by reacting with arene (arene= hexamethyl benzene, 1,2,4,5-tetramethyl benzene, mesitylene, p-xylene and toluene) in the presence silver salt.SDS of cas: 14516-54-2

Referemce:
Bromide – Wikipedia,
bromide – Wiktionary

《Hydrogenation or Dehydrogenation of N-Containing Heterocycles Catalyzed by a Single Manganese Complex》 was written by Zubar, Viktoriia; Borghs, Jannik C.; Rueping, Magnus. Name: Bromopentacarbonylmanganese(I) And the article was included in Organic Letters in 2020. The article conveys some information:

A highly chemoselective base-metal catalyzed hydrogenation and acceptorless dehydrogenation of N-heterocycles was presented. A well-defined Mn-complex was operated at low catalyst loading (as low as 2 mol%) and under mild reaction conditions. The described catalytic system tolerated various functional groups and the corresponding reduced heterocycles was obtained in high yields. Exptl. studies indicated a metal ligand cooperative catalysis mechanism. The experimental process involved the reaction of Bromopentacarbonylmanganese(I)(cas: 14516-54-2Name: Bromopentacarbonylmanganese(I))

Bromopentacarbonylmanganese(I)(cas: 14516-54-2) has many other uses. It is used in the formation of (eta6-arene)tricarbonylmanganese(I) by reacting with arene (arene= hexamethyl benzene, 1,2,4,5-tetramethyl benzene, mesitylene, p-xylene and toluene) in the presence silver salt.Name: Bromopentacarbonylmanganese(I)

Referemce:
Bromide – Wikipedia,
bromide – Wiktionary

《Catalytic enantioselective synthesis of carbocyclic and heterocyclic spiranes via a decarboxylative aldol cyclization》 was published in Chemical Science in 2020. These research results belong to Inanaga, Kazato; Wollenburg, Marco; Bachman, Shoshana; Hafeman, Nicholas J.; Stoltz, Brian M.. Related Products of 14660-52-7 The article mentions the following:

The synthesis of a variety of enantioenriched 1,3-diketospiranes from the corresponding racemic allyl β-ketoesters via an interrupted asym. allylic alkylation is disclosed. Substrates possessing pendant aldehydes undergo decarboxylative enolate formation in the presence of a chiral Pd catalyst and subsequently participate in an enantio- and diastereoselective, intramol. aldol reaction to furnish spirocyclic β-hydroxy ketones which may be oxidized to the corresponding enantioenriched diketospiranes. Addnl., this chem. has been extended to α-allylcarboxy lactam substrates leading to a formal synthesis of the natural product (-)-isonitramine. The experimental process involved the reaction of Ethyl 5-bromovalerate(cas: 14660-52-7Related Products of 14660-52-7)

Ethyl 5-bromovalerate(cas: 14660-52-7) belongs to bromides. Most organobromine compounds, like most organohalide compounds, are relatively nonpolar. Bromine is more electronegative than carbon (2.9 vs 2.5). Consequently, the carbon in a carbon–bromine bond is electrophilic, i.e. alkyl bromides are alkylating agents.Related Products of 14660-52-7

Referemce:
Bromide – Wikipedia,
bromide – Wiktionary

The author of 《The high performance of polyaniline-gel network modified electrode in 3-(2,2,6,6-tetramethyl-piperidiynl-1-oxyl)-1-methylylimidazoliumbromide biredox electrolyte used for supercapacitor》 were Wang, Kui; Wang, Jixiao; Zhao, Song; Wang, Zhi; Wang, Shichang. And the article was published in Journal of Power Sources in 2019. SDS of cas: 623-24-5 The author mentioned the following in the article:

Improving energy d. while maintaining power d. and cycle stability is the most serious challenge for supercapacitors. The solid active electrode material might possess a higher redox species d. compared with its traditional counterpart, however, its electrochem. reaction kinetics is several magnitude orders lower in solids than that in liquids, leading to a deterioration of power d. Thus, a new approach based on 3-TEMPO-1-methylylimidazolium bromide (MIm+-TEMPO• Br-) biredox electrolyte, and a PANI-gel network modified carbon paper (PNcp) electrode for supercapacitor were developed. The biredox electrolyte possesses a high energy d. comparable to solid redox materials and a fast kinetics of liquid redox reaction, while the cross-diffusion of ions leads to a serious voltage drop which presents an inherent self-discharge problem. Fortunately, the PNcp prepared by a millisecond photo-thermal process makes up for this shortcoming. On one hand, its unique PANI-gel network structure protects the biredox electrolyte from cross-diffusion phenomenon, however, the combination of doping/dedoping process of PANI and redox process of MIm+-TEMPO• Br- provides an extra effect to prevent the self-discharge and attain a synergetic electrochem. performance. This method explores an avenue to pursue for battery level energy d. meanwhile maintains good power d. In addition to this study using 1,4-Bis(bromomethyl)benzene, there are many other studies that have used 1,4-Bis(bromomethyl)benzene(cas: 623-24-5SDS of cas: 623-24-5) was used in this study.

1,4-Bis(bromomethyl)benzene(cas: 623-24-5) belongs to organobromine compounds.Depending on the type of carbon to which the bromine is bonded, organic bromide could be alkyl, alkenyl, alkynyl, or aryl. SDS of cas: 623-24-5 Due to the reactivity of bromide, they are used as potential precursors or important intermediates in organic synthesis.

Referemce:
Bromide – Wikipedia,
bromide – Wiktionary

In 2017,Zhang, Ling; Jiang, Ke; Li, Yanping; Zhao, Dian; Yang, Yu; Cui, Yuanjing; Chen, Banglin; Qian, Guodong published 《Microporous Metal-Organic Framework with Exposed Amino Functional Group for High Acetylene Storage and Excellent C2H2/CO2 and C2H2/CH4 Separations》.Crystal Growth & Design published the findings.Application In Synthesis of 3,5-Dibromoaniline The information in the text is summarized as follows:

A microporous metal-organic framework [Cu2L(H2O)2]·(DMF)0.5·(H2O)7, (ZJU-195, H4TTCA-NH2 = 5-amino-3,3,5,5-tetracarboxylic acid, DMF = N,N-dimethylformamide) has been designed, synthesized, structurally characterized, and examined for its gas storage and separation The activated ZJU-195a has achieved high C2H2 storages of 275.6 cm3·g-1 at 273 K and 214.2 cm3·g-1 at 298 K under 1.0 bar. Furthermore, ZJU-195a selectively adsorbs C2H2 over CO2 and CH4, exhibiting moderately high C2H2/CH4 and C2H2/CO2 separations at ambient conditions with an ideal adsorbed solution theory selectivity of 43.4-64.6 and 4.7-12.4, resp. In the part of experimental materials, we found many familiar compounds, such as 3,5-Dibromoaniline(cas: 626-40-4Application In Synthesis of 3,5-Dibromoaniline)

3,5-Dibromoaniline(cas: 626-40-4) belongs to anime. Amine, any member of a family of nitrogen-containing organic compounds that is derived, either in principle or in practice, from ammonia (NH3). Naturally occurring amines include the alkaloids, which are present in certain plants; the catecholamine neurotransmitters (i.e., dopamine, epinephrine, and norepinephrine); and a local chemical mediator, histamine, that occurs in most animal tissues.Application In Synthesis of 3,5-Dibromoaniline

Referemce:
Bromide – Wikipedia,
bromide – Wiktionary

In 2016,Zherikova, Kseniya V.; Svetlov, Aleksey A.; Kuratieva, Natalia V.; Verevkin, Sergey P. published 《Structure-property relationships in halogenbenzoic acids: Thermodynamics of sublimation, fusion, vaporization and solubility》.Chemosphere published the findings.Reference of 3-Bromo-2-methylbenzoic acid The information in the text is summarized as follows:

Temperature dependences of vapor pressures for 2-, 3-, and 4-bromobenzoic acid, as well as for five isomeric bromo-methylbenzoic acids were studied by the transpiration method. Melting temperatures and enthalpies of fusion for all isomeric bromo-methylbenzoic acids and 4-bromobenzoic acid were measured with a DSC. The molar enthalpies of sublimation and vaporization were derived. These data together with results available in the literature were collected and checked for internal consistency using a group-additivity procedure and results from X-ray structural diffraction studies. Specific (hydrogen bonding) interactions in the liquid and in the crystal phase of halogenbenzoic acids were quantified based on exptl. values of vaporization and sublimation enthalpies. Structure-property correlations of solubilities of halogenobenzoic acids with sublimation pressures and sublimation enthalpies were developed and solubilities of bromo-benzoic acids were estimated These new results resolve much of the ambiguity in the available thermochem. and solubility data on bromobenzoic acids. The approach based on structure property correlations can be applied for the assessment of water solubility of sparingly soluble drugs. The experimental process involved the reaction of 3-Bromo-2-methylbenzoic acid(cas: 76006-33-2Reference of 3-Bromo-2-methylbenzoic acid)

3-Bromo-2-methylbenzoic acid(cas: 76006-33-2) belongs to organobromine compounds.Depending on the type of carbon to which the bromine is bonded, organic bromide could be alkyl, alkenyl, alkynyl, or aryl. Due to the reactivity of bromide, they are used as potential precursors or important intermediates in organic synthesis. Reference of 3-Bromo-2-methylbenzoic acid

Referemce:
Bromide – Wikipedia,
bromide – Wiktionary

Ydhyam, Sridhar; Cha, Jin Kun published their research in Organic Letters on December 4 ,2015. The article was titled 《Construction of Seven-Membered Carbocycles via Cyclopropanols》.Synthetic Route of C11H13BrO2 The article contains the following contents:

A new method for seven-membered ring annulation has been devised by an intramol. cross-coupling of cyclopropanols and aryl/alkenyl halides. This cyclization reaction is broad in scope and provides easy access to not only fused but also bridged bicyclic compounds In the part of experimental materials, we found many familiar compounds, such as Ethyl 3-(2-bromophenyl)propanoate(cas: 135613-33-1Synthetic Route of C11H13BrO2)

Ethyl 3-(2-bromophenyl)propanoate(cas: 135613-33-1) belongs to organobromine compounds.The reactivity of organobromine compounds resembles but is intermediate between the reactivity of organochlorine and organoiodine compounds. Synthetic Route of C11H13BrO2 The principal reactions for organobromides include dehydrobromination, Grignard reactions, reductive coupling, and nucleophilic substitution.

Referemce:
Bromide – Wikipedia,
bromide – Wiktionary

The author of 《Biphenylyl-1,2,4-oxadiazole based liquid crystals – synthesis, mesomorphism, effect of lateral monofluorination》 were Fouad, Farid S.; Ness, Todd; Wang, Kunlun; Ruth, Christopher E.; Britton, Sonia; Twieg, Robert J.. And the article was published in Liquid Crystals in 2019. Safety of 1-Bromo-4-ethoxy-2-fluorobenzene The author mentioned the following in the article:

Aiming at developing a new type of materials for functional applications, three series of new compounds were prepared, 3-(biphenylyl)-1,2,4-oxadiazoles, Series I; laterally mono-fluorinated 3-(biphenylyl)-1,2,4-oxadiazoles, Series II; and 5-(biphenylyl)-1,2,4-oxadiazoles, Series III. Liquid crystalline properties of these compounds were studied using differential scanning calorimetry and polarizing optical microscopy. Ten of the thirteen compounds in Series I are mesogenic forming either N or SmA phases depending on the length-to-width mol. ratio. Mesogens of the positional isomers, Series III are both N and SmA. Monofluorination of the biphenylyl group at either the central or the terminal phenylene rings, Series III, resulted in the formation of nematic mesogens with low phase transition temperatures and broad nematic phase range. In the experiment, the researchers used many compounds, for example, 1-Bromo-4-ethoxy-2-fluorobenzene(cas: 107713-66-6Safety of 1-Bromo-4-ethoxy-2-fluorobenzene)

1-Bromo-4-ethoxy-2-fluorobenzene(cas: 107713-66-6) belongs to organobromine compounds.The reactivity of organobromine compounds resembles but is intermediate between the reactivity of organochlorine and organoiodine compounds. Safety of 1-Bromo-4-ethoxy-2-fluorobenzene Dehydrobromination, Grignard reactions, reductive coupling, Wittig reaction, and several nucleophilic substitution reactions are some of the principal reactions which involve organic bromides.

Referemce:
Bromide – Wikipedia,
bromide – Wiktionary