Tag: M.W:200-300

Formula: C10H8BrNO2. The protonation of heteroatoms in aromatic heterocycles can be divided into two categories: lone pairs of electrons are in the aromatic ring conjugated system; and lone pairs of electrons do not participate. Compound: 2-(7-Bromo-1H-indol-3-yl)acetic acid, is researched, Molecular C10H8BrNO2, CAS is 63352-97-6, about Response of substituted indoleacetic acids in the indolo-α-pyrone fluorescence determination. Author is Boettger, Michael; Engvild, Kjeld C.; Kaiser, Petra.

The fluorescence determination of IAA (using the fluorescence of its α-pyrone derivative) was investigated to study possible interference from 4-chloro-IAA and 5-hydroxy-IAA, which occur naturally. Both compounds showed ∼40% of the fluorescence of IAA after conversion to their α-pyrones. Halogenated IAA showed 0-60% of the fluorescence of IAA. Thus, concentration of IAA cannot be determined in crude extracts in the presence of 4-chloro- or 5-hydroxy-IAA because sep. determinations of each of these compounds are not possible by changing the excitation or fluorescence wave-lengths of the testing equipment.

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The preparation of ester heterocycles mostly uses heteroatoms as nucleophilic sites, which are achieved by intramolecular substitution or addition reactions. Compound: Bromoferrocene( cas:1273-73-0 ) is researched.Computed Properties of C10BrFe.Sasamori, Takahiro; Kobayashi, Megumi; Nagahora, Noriyoshi; Sugiyama, Yusuke; Tokitoh, Norihiro published the article 《Synthesis and characterization of functionalized ferrocenylsilanes bearing a bulky substituent》 about this compound( cas:1273-73-0 ) in Silicon Chemistry. Keywords: sterically crowded ferrocenylsilane preparation crystal mol structure electrochem redox; DFT calculation hindered ferrocenylsilanediol. Let’s learn more about this compound (cas:1273-73-0).

Several types of overcrowded ferrocenylsilanes, Tbt(Fc)SiX2(Tbt = 2,4,6-tris[bis(trimethylsilyl)methyl]phenyl, Fc = ferrocenyl, X = H, OH, Br) were synthesized and characterized. In addition, DFT calculations for ferrocenylsilanediol systems indicated the existence of the intramol. hydrogen bonding between the Fe atom and H-O moiety in Tbt(Fc)Si(OH)2.

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Product Details of 1273-73-0. Aromatic compounds can be divided into two categories: single heterocycles and fused heterocycles. Compound: Bromoferrocene, is researched, Molecular C10BrFe, CAS is 1273-73-0, about Dipole moments and internal rotation in 1,1′-dihaloferrocenes. Author is Sorriso, S.; Cardaci, G.; Murgia, S. M..

The dipole moments of bromoferrocene, iodoferrocene, 1,1′-dibromoferrocene, and 1-1′-diiodoferrocene have been measured in C6H6. They indicate that the potential barrier between the cis and trans forms, which is very small for 1,1′-dichloroferrocene, increases for 1,1′-dibromo- and 1,1′-diiodoferrocene. The potential energy function shows min. at 36°, 108° and 180°. The differences ΔE1 = E36° – E180° for the series have been calculated on the assumption that the min. at 180° and 108° are equal. The values obtained are consistent with increasing steric hindrance in the series Cl, Br, I.

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Epoxy compounds usually have stronger nucleophilic ability, because the alkyl group on the oxygen atom makes the bond angle smaller, which makes the lone pair of electrons react more dissimilarly with the electron-deficient system. Compound: Bromoferrocene, is researched, Molecular C10BrFe, CAS is 1273-73-0, about Ferrocene and related compounds. VIII. Internal rotation of the ferrocene molecule.Safety of Bromoferrocene.

cf. CA 59, 5195h. The dipole moments of chloro- and bromoferrocene, measured at 20°, and of 1,1-dichloro- and 1,1-dibromoferrocene, measured at +5 and -20 to +130°, resp., are nearly identical to those of the corresponding monohalobenzenes. The values obtained for the dipole moments of the dihaloferrocenes at various temperatures can be used to calculate the energy differences of the 3 min. of the potential energy curves of internal rotation corresponding to the 3 antiprismatic conformations. A comparison of the curves with those of 1,2-dihaloethanes reveals that the energy barriers of internal rotation are smaller in ferrocene than in ethane. Attempts were made to calculate the contours of the potential energy curves of ferrocene and its halogen derivatives

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The reaction of an aromatic heterocycle with a proton is called a protonation. One of articles about this theory is 《Diazo compounds of ferrocene》. Authors are Nesmeyanov, A. N.; Drozd, V. N.; Sazonova, V. A..The article about the compound:Bromoferrocenecas:1273-73-0,SMILESS:Br[C-]12[Fe+2]3456789([C-]%10C6=C7C8=C9%10)C1=C3C4=C25).COA of Formula: C10BrFe. Through the article, more information about this compound (cas:1273-73-0) is conveyed.

cf. CA 52, 14579b. Since ferrocenediazonium salts cannot be prepared with HNO2 owing to destruction of the ring by this acid, an indirect method was devised. Diazoaminoferrocene was added at -4(1° to concentrated HCl and the mixture gradually warmed to -20°, when a violet color of the diazonium salt appeared, while at -15°, N evolution commenced and terminated at -5°; crystals of chloroferrocene precipitated After dilution and extraction with Et2O, the organic extract was washed with aqueous KOH and H2O, and evaporated yielding 72% chloroferrocene (I), m. 57-8°. The mother liquor after neutralization and extraction with Et2O gave 62% ferrocenylamine, m. 154-5°. Similar treatment of benzenediazoaminoferrocene gave 76% I and traces of ferrocenylamine; similar decompn, in concentrated HBr or HI gave 70% bromoferrocene, m. 32-3°, or 72% iodoferrocene, m. 42 4°, resp. Similar reaction with 40% H2SO4 in the presence of Et2O gave a solution containing hydroxyferrocene, which was isolated as the benzoyl derivative, m. 108.5-9 5° in 3% yield. Benzenediazoaminoferrocene hydrolyzed as above in concentrated HCl, warmed to -20° to form the diazonium salt solution, and treated with 2-C10H7OH in 10% KOH in the cold gave, after chromatog. purification on Al2O3, 48% 1-ferroceneazo-2-naphthol (II), m. 151-2°, a green solid, along with 28% I; II gave violet solutions in organic solvents and was insoluble in alkalies. 1,1′-Bis(benzenediazoamino)ferrocene treated similarly in the cold with concentrated HCl gave a violet solution of the bis(diazonium salt), which with 2-C10H7OH as above gave a little II, 35% red 1-benzeneazo-2-naphthol, and 24% black ferrocene-1,1′-bis(1-azo-2-naphthol), decompg 212-13°.

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Category: thiazolidine. So far, in addition to halogen atoms, other non-metallic atoms can become part of the aromatic heterocycle, and the target ring system is still aromatic. Compound: Bromoferrocene, is researched, Molecular C10BrFe, CAS is 1273-73-0, about Triferrocenylborane and its amine adducts.

The synthesis and characterization by IR, diffuse reflectance, thermogravimetric and Moessbauer techniques of triferrocenylborane and its adducts with ammonia, methylamine, ethylamine, propylamine, dimethylamine, and pyridine, are reported. Bands in the 1250 and 760 cm-1 IR regions are assigned to vibration of the B-C and B-N bonds, resp. In the visible region the spectra show besides the two typical ferrocene bands, shifted to lower frequency, a third one around 15,000 cm-1, probably due to the splitting of the first excited level of ferrocene caused by its decrease in symmetry when bonding covalently to boron in triferrocenylborane. Moessbauer spectroscopy shows that the s-electron d. around the 57Fe nucleus is higher in triferrocenylborane than in ferrocene; part of this s-electron d. is decreased by addnl. d-electron d. in the case of the adduct compounds

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So far, in addition to halogen atoms, other non-metallic atoms can become part of the aromatic heterocycle, and the target ring system is still aromatic.Engvild, K. C. researched the compound: 2-(7-Bromo-1H-indol-3-yl)acetic acid( cas:63352-97-6 ).SDS of cas: 63352-97-6.They published the article 《Preparation of chlorinated 3-indolylacetic acids》 about this compound( cas:63352-97-6 ) in Acta Chemica Scandinavica, Series B: Organic Chemistry and Biochemistry. Keywords: indoleacetic acid chloro; phenylhydrazine cyclization formylpropionate; hydrazine phenyl reaction formylpropionate; propionate formyl reaction phenylhydrazine. We’ll tell you more about this compound (cas:63352-97-6).

Indoleacetic acids I (Rn = 4-Cl, 6-Cl) were prepared in 38-40% yield by reaction of the resp. chloro(diethylaminomethyl)indole with NaCN followed by hydrolysis. I (Rn = 5-Cl, 7-Cl, 4,6-Cl2, 4,7-Cl2, 5,7-Cl2, 6,7-Cl2, 5-Cl-7-Me, 7-Br) were prepared in 7-28% yield by reaction of HCOCH2CH2CO2H with the appropriate phenylhydrazine hydrochlorides.

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So far, in addition to halogen atoms, other non-metallic atoms can become part of the aromatic heterocycle, and the target ring system is still aromatic.Zaworotko, Mike; Subramanian, S.; Macgillivray, L. R. researched the compound: quinoliniumhydrogensulphate( cas:530-66-5 ).Recommanded Product: quinoliniumhydrogensulphate.They published the article 《Strategies for crystal engineering of polar solids》 about this compound( cas:530-66-5 ) in Materials Research Society Symposium Proceedings. Keywords: crystal engineering polar solid; hydrogen sulfate organic polar solid; cubane cluster polar solid; structure bisulfate cluster compound crystal. We’ll tell you more about this compound (cas:530-66-5).

Crystal engineering was invoked to design structural analogs of 2 prototypic SHG active solids, p-nitroaniline (pNA) and K dihydrogen phosphate (KDP). PNA exists as linear polar strands because of head-to-tail H bonding between adjacent mols. whereas KDP is a self-assembled H bonded diamond-type network that becomes polar when the H bonds align. The authors detail preparation and crystallog. characterization of 2 classes of multicomponent solid, organic cation H sulfates and co-crystals of the cubane cluster [M(CO)3(μ3-OH)]4, which structurally mimic pNA and KDP, resp. Several of the multi-component solids are polar and they represent a generic approach to designing new polar materials since 1 component can be changed without altering the basic architecture within the crystal.

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Heterocyclic compounds can be divided into two categories: alicyclic heterocycles and aromatic heterocycles. Compounds whose heterocycles in the molecular skeleton cannot reflect aromaticity are called alicyclic heterocyclic compounds. Compound: 1273-73-0, is researched, Molecular C10BrFe, about Dye Regeneration Kinetics in Dye-Sensitized Solar Cells, the main research direction is redox electrochem kinetics dye sensitized solar cell; solar cell dye sensitized electrochem regeneration; carbazole thiophene dye regeneration solar cell.Related Products of 1273-73-0.

The ideal driving force for dye regeneration is an important parameter for the design of efficient dye-sensitized solar cells. Here, nanosecond laser transient absorption spectroscopy was used to measure the rates of regeneration of six organic carbazole-based dyes by nine ferrocene derivatives whose redox potentials vary by 0.85 V, resulting in 54 different driving-force conditions. The reaction follows the behavior expected for the Marcus normal region for driving forces below 29 kJ mol-1 (ΔE = 0.30 V). Driving forces of 29-101 kJ mol-1 (ΔE = 0.30-1.05 V) resulted in similar reaction rates, indicating that dye regeneration is diffusion controlled. Quant. dye regeneration (theor. regeneration yield 99.9%) can be achieved with a driving force of 20-25 kJ mol-1 (ΔE ≈ 0.20-0.25 V).

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The preparation of ester heterocycles mostly uses heteroatoms as nucleophilic sites, which are achieved by intramolecular substitution or addition reactions. Compound: Bromoferrocene( cas:1273-73-0 ) is researched.Computed Properties of C10BrFe.Saji, Tetsuo; Ito, Naoyuki published the article 《The electrochemical cleavage of carbon-halogen bonds of haloferrocenes》 about this compound( cas:1273-73-0 ) in Bulletin of the Chemical Society of Japan. Keywords: haloferrocene cyclic voltammetry; iodoferrocene cyclic voltammetry; bromoferrocene cyclic voltammetry; chloroferrocene cyclic voltammetry; electroreduction haloferrocene. Let’s learn more about this compound (cas:1273-73-0).

Cyclic voltammetric studies for chloroferrocene  [1273-74-1], bromoferrocene  [1273-73-0], and iodoferrocene  [1273-76-3] in ethylene glycol di-Me ether at -45° were reported. The cyclic voltammogram and the absorption spectrum of the solution after the exhaustive controlled-potential reduction for the reduction step of haloferrocene show a quant. formation of ferrocene and a cleavage of the C-halogen bond of haloferrocene.

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