Category: 52358-73-3

Yazaki, Kohei published the artcilePolycationic-shelled capsular and tubular nanostructures and anionic-guest binding properties, SDS of cas: 52358-73-3, the publication is Chemistry – A European Journal (2016), 22(49), 17557-17561, database is CAplus and MEDLINE.

For the development of novel nanospace with unique electrostatic character, we prepared new capsular and tubular nanostructures by the quant. assembly of metal ions and bent bisacridinium ligands. The capsule and tube have closed spherical and open cylindrical cavities, resp., with diameters of around 1 nm surrounded by cationic polyaromatic panels. Thanks to the facile synthetic protocol (three steps), another polycationic capsule with an elliptical nanocavity was also prepared by using an elongated ligand. In spite of the absence of pendant hydrophilic groups, the spherical polyaromatic capsule shows sufficient water solubility due to the polycationic shell. Moreover, the highly cationic cavity (12+) can selectively encapsulate anionic organic compounds in water.

Chemistry – A European Journal published new progress about 52358-73-3. 52358-73-3 belongs to bromides-buliding-blocks, auxiliary class Bromide,Naphthalene, name is 1,3-Dibromonaphthalene, and the molecular formula is C4H4OS, SDS of cas: 52358-73-3.

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

Turro, Nicholas J. published the artcileQuantum chain processes. Novel procedure for measurment of quenching parameters. Evidence that exothermic triplet-triplet energy transfer is not diffusion limited and an estimation of the efficiency of exothermic quenching in a solvent cage, Safety of 1,3-Dibromonaphthalene, the publication is Journal of the American Chemical Society (1974), 96(6), 1936-8, database is CAplus.

It is shown that quantum chain reactions involving tetramethyl-1,2-dioxetane (I) as the key quantum carrying reagent occur when I is thermolyzed in the presence of electronic energy acceptors. A kinetic scheme is derived to handle chemiluminescence quenching data. The data are used to disprove the common assumption that exothermic triplet-triplet energy transfer is diffusion limited.

Journal of the American Chemical Society published new progress about 52358-73-3. 52358-73-3 belongs to bromides-buliding-blocks, auxiliary class Bromide,Naphthalene, name is 1,3-Dibromonaphthalene, and the molecular formula is C6H5N3O, Safety of 1,3-Dibromonaphthalene.

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

Cakmak, Osman published the artcileBromination of naphthalene. Preparation of 1,3-dibromonaphthalene, Quality Control of 52358-73-3, the publication is Journal of Chemical Research, Synopses (1999), 366-367, database is CAplus.

Photobromination of naphthalene with mol. bromine gives only one stereoisomer, 1α,2β,3α,4β-tetrabromo-1,2,3,4-tetrahydronaphthalene (I) in 90% yield; dehydrobromination of I results in the formation of 1,3-dibromonaphthalene in 88% yield.

Journal of Chemical Research, Synopses published new progress about 52358-73-3. 52358-73-3 belongs to bromides-buliding-blocks, auxiliary class Bromide,Naphthalene, name is 1,3-Dibromonaphthalene, and the molecular formula is C10H6Br2, Quality Control of 52358-73-3.

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

Zeng, Xiao-Lan published the artcileQSPR study on octanol/water partition coefficient (lgK_ow) of substituted naphthalin compounds, Recommanded Product: 1,3-Dibromonaphthalene, the publication is Chinese Journal of Structural Chemistry (2007), 26(3), 281-286, database is CAplus.

Structural parameters of 24 substituted naphthalin compounds were computed at four levels using Hartree-Fock and DFT methods. Based on the exptl. data of octanol/water partition coefficient (lgK_ow), three-parameter (energy of the HOMO (E_HOMO), the most pos. at. net charges of mol. (q⁺) and mol. average polarizability (α)) dependent equations were developed using structural parameters as theor. descriptors. Especially, lgK_ow dependent equation calculated at the HF/6-311G** level is more advantageous than others in view of their correlation and predictive abilities. This dependent equation was validated by variance inflation factors (VIF) and t-test methods and used to predict lgK_ow of eight designed compounds Upon comparison, the predictive abilities of our work are all more advantageous than those calculated from mol. property calculator program.

Chinese Journal of Structural Chemistry published new progress about 52358-73-3. 52358-73-3 belongs to bromides-buliding-blocks, auxiliary class Bromide,Naphthalene, name is 1,3-Dibromonaphthalene, and the molecular formula is C6H5BN2O3, Recommanded Product: 1,3-Dibromonaphthalene.

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

Hardy, A. published the artcile7-Nitro-1-naphthylamine. I. Its preparation, halogenation, and diazo coupling; and 1,2,4,7-tetrahalonaphthalenes, Product Details of C10H6Br2, the publication is Journal of the Chemical Society (1956), 1979-84, database is CAplus.

7-Nitro-1-naphthylamine (I), m. 132-3° (from EtOH), was prepared in 38-45% yield by rearrangement of 1,2,3,4-tetrahydro-7-nitro-1-oxonaphthalene oxime acetate (cf. Schroeter, et al., C.A. 24, 4291), in 22% yield by passage of HCl for 2 hrs. through a suspension of 3.6 g. of the oxime phenylcarbamate in 30 cc. EtOH at 90°, in 10% yield by rearrangement of the oxime in tetraphosphoric acid, and in 42 % yield by reduction of 1,7-dinitronaphthalene (cf. Hodgson and Turner, C.A. 37, 6258¹). The first method was considered to be the best. Derivatives of I had the following m.ps.: N-formyl, 218°; N-acetyl (II), 213°; N-(p-toluenesulfonyl), 202°; N-(p-nitrobenzylidene), 210°. I.HCl was unstable in air. Slow passage of Cl into a solution of 1 g. II in 25 cc. HOAc at 50° until l’mole was absorbed gave 50% 1-acetamido-4-chloro-7-nitronaphthalene (III), m. 256° (from HOAc). Refluxing 0.8 g. III 6 hrs. with 10 cc. EtOH and 10 cc. 50% weight/volume aqueous H₂SO₄ gave after basification with aqueous NH₃ 90% 4-chloro-7-nitro-1-naphthylamine (IV), m. 206° (from EtOH). Deamination of IV gave 37% 1-chloro-6-nitronaphthalene, m. 126° (from EtOH). Passage of Cl through 1 g. II in 25 cc. HOAc at 50° until 2 moles were absorbed gave 64% 1-acetamido-2,4-dichloro-7-nitronaphthalene (V), m. 237° (from HOAc). Hydrolysis of V in EtOH-H₂SO₄ 8 hrs. gave 97% 2,4-dichloro-7-nitro-1-naphthylamine (VI), m. 228° (from EtOH). Diazotization of VI and addition of the solution to aqueous NaOAc gave 4-chloro-1-diazo-7-nitro-2-naphthol, m. 175° (decomposition), in quant. yield. VI was converted to 2,4-dichloro-1,7-naphthylenediamine (VII), m. 135-6° (from EtOH), by refluxing 1.0 g. 10 hrs. with 20 cc. H₂O containing 2.5 g. Fe dust and 0.2 g. FeNH₄(SO₄)₂ under CO₂. VII (0.75 g.) in 12 cc. HOAc and 2 cc. H₂SO₄ was diazotized with 0.6 g. NaNO₂ in 4 cc. H₂SO₄, and the mixture added rapidly to 15 cc. MeOH containing 1.75 g. Cu₂O and then to 100 cc. H₂O to give 1,3-dichloronaphthalene. VII was diazotized as above, the solution poured into 6 cc. aqueous HCl containing 0.6 g. CuCl at 60°, and then into 25 cc. H₂O to give 1,2,4,7-tetrachloronaphthalene, m. 143-4° (from EtOH), identical with the 1,2,4,x-tetrachloronaphthalene of Turner and Wynne (C.A. 35 5885⁷). Dropwise addition of 10 g. I in 200 cc. CHCl₃ to 18.5 g. Br in 6 cc. CHCl₃ gave after basification 90% 2,4-dibromo-7-nitro-1-naphthylamine (VIII), m. 237° (from EtOH). Use of 1 mole Br gave the same product. Addition of 0.6 g. VIII in 12 cc. HOAc to 0.2 g. NaNO₂ in 1 cc. H₂SO₄ and after 30 min. to 5 g. NaOAc in 50 cc. H₂O gave 4-bromo-1-diazo-7-nitro-2-naphthol, m. 156.5° (from aqueous dioxane). Reduction of VIII by a method similar to that used for VI gave 51% 2,4-dibromo-1,7-naphthylenediamine (IX), m. 122° (decomposition) (from aqueous EtOH). IX was diazotized and converted to 7% 1,3-dibromonaphthalene, m. 63°. Addition of Br in 10 cc. HOAc to 2 g. II in 10 cc. HOAc containing 0.75 g. NaOAc during 45 min. under reflux and heating 30 min. gave 84% 1-acetamido-4-bromo-7-nitronaphthalene (X), m. 265° (from HOAc). X (2 g.) was refluxed with 10 cc. aqueous H₂SO₄ and 10 cc. EtOH for 3 hrs., and the residue was separated and refluxed again with the hydrolyzing solution 5 hrs. The amine sulfates from the 2 solutions were basified with aqueous NH₃ at 0° to give 92% 4-bromo-7-nitro-1-naphthylamine (XI), m. 197° (from ligroine b. 100-20°). Deamination of XI gave 18% 1-bromo-6-nitronaphthalene, m. 129°. Diazotization of 0.8 g. IX and reaction of the solution with 0.9 g. CuBr in 6 cc. aqueous HBr (50% weight/volume) gave 20% 1,2,4,7-tetrabromonaphthalene, m. 165° (from EtOH). This differed from the tetrabromonaphthalene of Guareschi [Gazz. chim. ital. 16, 146 (1886)], indicating that the latter was the 1,2,4,6-derivative Slow addition of 0.65 g. p-O₂NC₆H₄N₂HSO₄ in 15 cc. H₂O to 0.5 g. I in 15 cc. EtOH containing 0.36 g. NaOAc at 0° gave after 30 min. 88% 7-nitro-4-(p-nitrophenylazo)-1-naphthylamine (XII), purple-black needles, m. 297° (from PhNO₂). XII (0.15 g.) was acetylated by refluxing in 10 cc. AcOH, 2 cc. Ac₂O, and 1 g. NaOAc to give 75% 1-acetamido-7-nitro-4-(p-nitrophenylazo)naphthalene, m. 329-30°. Diazotization of XII and coupling with β-naphthol in aqueous NaOH gave 7-nitro-4-(p-nitrophenylazo)-1-naphthylazo-2-naphthol, violet-black needles, m. 292° (decomposition).

Journal of the Chemical Society published new progress about 52358-73-3. 52358-73-3 belongs to bromides-buliding-blocks, auxiliary class Bromide,Naphthalene, name is 1,3-Dibromonaphthalene, and the molecular formula is C10H6Br2, Product Details of C10H6Br2.

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

Chen, Fengli published the artcileSelective adsorption of C₂H₂ and CO₂ from CH₄ in an isoreticular series of MOF constructed from unsymmetrical diisophthalate linkers and the effect of alkoxy group functionalization on gas adsorption, Application of 1,3-Dibromonaphthalene, the publication is Journal of Materials Chemistry A: Materials for Energy and Sustainability (2018), 6(8), 3471-3478, database is CAplus.

For acetylene production and natural gas purification, development of porous materials exhibiting highly selective C₂H₂/CH₄ and CO₂/CH₄ separations is very important but remains a major challenge. This work used three unsym. diisophthalate ligands to construct an isoreticular series of Cu-based metal-organic frameworks (MOF) exhibiting highly selective adsorption of C₂H₂ and CO₂ from CH₄ under ambient conditions. Gravimetric uptake capacities at 298° K and 1 atm varied from 171.7 to 200.4 cm³ (STP)/g for C₂H₂ and from 104.1 to 115.6 cm³ (STP)/g for CO₂. IAST adsorption selectivity was 27.6-34.5 for an equimolar C₂H₂/CH₄ mixture, and 5.73-7.14 for an equimolar CO₂/CH₄ mixture at 298° K and 1 atm. These values are among the highest reported for MOF constructed from bent diisophthalate ligands under the same conditions. The effect of alkoxy group functionalization on gas adsorption was also examined and showed, that compared to the parent compound, alkoxy group functionalized MOF exhibited a reduced uptake capacity but an improved adsorption selectivity. Results showed the three MOF are promising materials for C₂H₂/CH₄ and CO₂/CH₄ separations, and provided a fundamental understanding of alkoxy group functionalization on gas adsorption properties.

Journal of Materials Chemistry A: Materials for Energy and Sustainability published new progress about 52358-73-3. 52358-73-3 belongs to bromides-buliding-blocks, auxiliary class Bromide,Naphthalene, name is 1,3-Dibromonaphthalene, and the molecular formula is C10H6Br2, Application of 1,3-Dibromonaphthalene.

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

Bovonsombat, Pakorn published the artcileRegioselective monobromination of aromatics via a halogen bond acceptor-donor interaction of catalytic thioamide and N-bromosuccinimide, Formula: C10H6Br2, the publication is Tetrahedron (2017), 73(46), 6564-6572, database is CAplus.

Regioselective monobromination of various aromatics was achieved at room temperature using N-bromosuccinimide and 5 mol% of thioamides in acetonitrile. With thiourea as catalyst, activated aromatics, such as anisole, acetanilide, benzamide and phenol analogs containing electron donating or withdrawing groups, were brominated with high regioselectivity. Room temperature brominations of weakly activated aromatics and deactivated 9-fluorenone were accomplished by 5 mol% thioacetamide, higher substrates concentrations and longer reaction times. A backbonding of the bromine lone pairs with the π^*of C=S group and a halogen bond between the halogen bond donor bromine and the halogen bond acceptor sulfur of the thioamide are thought to be the principal interactions and cause of N-bromosuccinimide activation.

Tetrahedron published new progress about 52358-73-3. 52358-73-3 belongs to bromides-buliding-blocks, auxiliary class Bromide,Naphthalene, name is 1,3-Dibromonaphthalene, and the molecular formula is C10H6Br2, Formula: C10H6Br2.

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

Dastan, Arif published the artcileBromination of naphthalene and derivatives: high temperature bromination. XI, Recommanded Product: 1,3-Dibromonaphthalene, the publication is Tetrahedron (1999), 55(44), 12853-12864, database is CAplus.

Thermal bromination and photobromination of naphthalenes have been studied. Several hexabromo- and tetrabromotetralin derivatives have been obtained as the major products, besides bromonaphthalene derivatives Base-promoted elimination reactions provided di-, tri-, and tetrabromonaphthalenes. A convenient method was developed for the synthesis of 1,3-dibromonaphthalene starting from I. The structures of these products were determined by ¹H- and ¹³C-NMR data and x-ray structural anal.

Tetrahedron published new progress about 52358-73-3. 52358-73-3 belongs to bromides-buliding-blocks, auxiliary class Bromide,Naphthalene, name is 1,3-Dibromonaphthalene, and the molecular formula is C10H6Br2, Recommanded Product: 1,3-Dibromonaphthalene.

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

Amsharov, K. Yu. published the artcileFormation of fullerenes by pyrolysis of 1,2′-binaphthyl and 1,3-oligonaphthylene, HPLC of Formula: 52358-73-3, the publication is Carbon (2007), 45(2), 337-343, database is CAplus.

High-temperature pyrolysis of two fullerene precursors, 1,2′-binaphthyl and 1,3-oligonaphthyl, has been investigated. An oligomer of naphthalene with the appropriate orientation of fragments, which contains all 60 carbon atoms, 12 of 20 six-membered rings and 71 of 90 carbon-carbon bonds required to form the C₆₀ fullerene cage was synthesized in a three-step synthesis from naphthalene. The formation of fullerene during pyrolysis was confirmed by MALDI-TOF and HPLC anal. of the toluene extract obtained from the raw soot. It was found that the toluene extract contains free C₆₀ fullerene but the main share of fullerenes exists in the form of their derivatives The yield of free C₆₀ was estimated as 0.1% by HPLC but the overall yield of C₆₀ seems to be higher and was estimated as ≈1%.

Carbon published new progress about 52358-73-3. 52358-73-3 belongs to bromides-buliding-blocks, auxiliary class Bromide,Naphthalene, name is 1,3-Dibromonaphthalene, and the molecular formula is C10H6Br2, HPLC of Formula: 52358-73-3.

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

Wibaut, J. P. published the artcileEffect of temperatures and catalysts on the bromination of naphthalene; the α-bromonaphthalene ⇄ β-bromonaphthalene equilibrium, Quality Control of 52358-73-3, the publication is Proceedings of the Koninklijke Nederlandse Akademie van Wetenschappen (1948), 776-86, database is CAplus.

The content of β-monobromonaphthalene increases slowly with temperature of reaction over the range 85° to 215° according to ln(Cα/Cβ) = (Εβ – Εα)/RT where Ε is the energy of activation of the bromination reaction. Εβ – Εα = 2498 cal./mol. in agreement with exptl. results of Suyver and Wibaut. (C.A. 40, 3428). Catalysts (FeCl₃ or FeBr₃) cause an increase in amount of β-mono-, di-, and tribrominated products. Uncatalyzed: about 3-8% β in a yield of 50-60% C₁₀H₇Br over the range 85-215° is obtained; catalyzed: about 22 to 48% β in a yield of 37-42% C₁₀H₇Br. The yield is affected greatly by reaction time, etc. Either α- or β-C₁₀H₇Br in contact with FeCl₃ or FeBr₃ at 150° gives the same equilibrium mixture of 40% α and 60% β. No such conversion occurs in the absence of catalyst. Equilibrium mixtures contain 63.1% β at 100°, 62.3% β at 150°, 60.4% β at 200°, and 58.8% β at 250°. ΔH conversion α ⇄ β is calculated as -500 ± 130 cal./mol. 1,2-, 1,3-, and 1,6-Dibromonaphthalene +HBr + FeCl₃ at 150° → 56% β- and 44% α-C₁₀H₇Br + Br₂. An ionic mechanism is proposed, although wave-mech. calculations are discussed which support either ionic or free-radical mechanisms. Catalyzed vapor-phase bromination of C₁₀H₈ yields 55.35% (calculated on Br) C₁₀H₇Br in range 250°. The kinetics and mechanism of this reaction are discussed. Again either α- or β-C₁₀H₇Br passed over a catalyst in gas phase yields an equilibrium mixture of about 60% β and 40% α.

Proceedings of the Koninklijke Nederlandse Akademie van Wetenschappen published new progress about 52358-73-3. 52358-73-3 belongs to bromides-buliding-blocks, auxiliary class Bromide,Naphthalene, name is 1,3-Dibromonaphthalene, and the molecular formula is C4H10O2, Quality Control of 52358-73-3.

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