Month: April 2022

Application In Synthesis of Bromoferrocene. 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 Redox-Rich Metallocene Tetrazene Complexes: Synthesis, Structure, Electrochemistry, and Catalysis. Author is Vanicek, Stefan; Jochriem, Markus; Hassenrueck, Christopher; Roy, Souvik; Kopacka, Holger; Wurst, Klaus; Mueller, Thomas; Winter, Rainer F.; Reisner, Erwin; Bildstein, Benno.

Thermal or photochem. metal-centered cycloaddition reactions of azidocobaltocenium hexafluorophosphate or azidoferrocene with (cyclooctadiene)(cyclopentadienyl)Co(I) afforded the first metallocenyl-substituted tetrazene cyclopentadienyl cobalt complexes together with azocobaltocenium or azoferrocene as side products. The trimetallic CpCo compounds are highly conjugated, colored and redox-active metallo-aromatic compounds, as shown by their spectroscopic, structural and electrochem. properties. The CpCo-tetrazenido complex with two terminally appended cobaltocene units catalyzes electrochem. proton reduction from acetic acid at a mild overpotential (0.35 V). Replacing cobaltocene with ferrocene moieties rendered the complex inactive toward catalysis.

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Application of 1273-73-0. The fused heterocycle is formed by combining a benzene ring with a single heterocycle, or two or more single heterocycles. Compound: Bromoferrocene, is researched, Molecular C10BrFe, CAS is 1273-73-0, about Reactions of haloferrocenes. II. Kinetic studies of the reaction of haloferrocene with copper(1) chloride-pyridine complex. Author is Sato, Masaru; Motoyama, Izumi; Hata, Kazuo.

The reaction of bromoferrocene with CuCl-C5H5N complex was second-order; first-order in each of bromoferrocene and CuCl-C5H5N. Competitive reactions between bromoferrocene and PhBr indicated that bromoferrocene was 103 times more reactive than PhBr in the halogenexchange reaction. The effects of pyridine bases on the halogen-exchange reaction of bromoferrocene were examined, and the trend of results was different from that of PhBr.

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Recommanded Product: 1,2,3,4-Tetrahydroquinoline-3-carboxylic acid. Aromatic compounds can be divided into two categories: single heterocycles and fused heterocycles. Compound: 1,2,3,4-Tetrahydroquinoline-3-carboxylic acid, is researched, Molecular C10H11NO2, CAS is 114527-53-6, about Reduction of quinolinecarboxylic acids by Raney nickel. Author is Gracheva, I. N.; Tochilkin, A. I..

The heterocyclic nucleus of quinolinecarboxylic acids was reduced by Raney Ni in alkali media giving 1,2,3,4-tetrahydroquinoline-2-, -3-, -4-, -5-, -6-, and -8-carboxylic acids. Their Et esters were also prepared

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Safety of Ethyl 3,5-Dimethyl-2-pyrrolecarboxylate. Aromatic compounds can be divided into two categories: single heterocycles and fused heterocycles. Compound: Ethyl 3,5-Dimethyl-2-pyrrolecarboxylate, is researched, Molecular C9H13NO2, CAS is 2199-44-2, about Synthesis and some reactions of pyrroles with aliphatic acyl substituents. Author is Mironov, A. F.; Ol’shanskaya, N. B.; Zhestkov, V. P.; Evstigneeva, R. P..

4-Acylpyrrolecarboxylates (I; R = EtCO, C15H31CO, C17H35CO) were prepared in about quant. yields of Friedel-Crafts acylation of I (R = H). Reduction of I by NaBH4 gave 82-97% of alc. (II; R = Et, C15H31, R1 = H). Heating II (R = C15H31, R1 = H) in pyridine with Ac2O gave 96% acryl derivative II (R = C15H31, R1 = Ac). Treatment of I (R = C17H35CO) with Pb(OAc)4 gave an acylated intermediate which with 40% HBr and MeOH gave 85% pyrrole (III; R = C17H35CO, R1 = MeO). Similarly III (R = C15H31CO, R1 = Cl) was obtained in 75% yield.

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Safety of Bromoferrocene. 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: Bromoferrocene, is researched, Molecular C10BrFe, CAS is 1273-73-0, about Reactions of haloferrocenes with organolithium compounds. Author is Sonoda, Akio; Moritani, Ichiro.

Reactions of BuLi or PhLi with chloroferrocene (I), 1,1′-dichloroferrocene (II), and bromoferrocene (III) were investigated. I (0.802 g) in 25 ml Et2O treated with 200 millimoles. BuLi in Et2O and quenched with H2O gave 0.033 g ferrocene (IV) and 0.534 g I. Lithiation of 0.870 g I followed by carbonation and esterification afforded 0.398 g Me 2-chloroferrocenecarboxylate (V) and 0.051 g di-Me 2-chloroferrocene-1,1′-dicarboxylate. Similarly I and PhLi gave 21% V. Heating I and PhLi 4.5 hr and quenching with H2O afforded 50% I, 8% IV, and 24% phenylferrocene (V). However no ferrocyne was detected in attempted capture with some dienes. Similarly lithiation of II followed by carbonation and esterification gave meso and racemic forms, m. 117-17.5° and 110-11°, of di-Me 2,2′-dichloroferrocenedicarboxylates in 48% yield. The reaction of III with BuLi at -78° followed by quenching with H2O gave 36% IV and 37% IV, whereas lithiation at room temperature gave 99% IV. Treating III with PhLi also afforded small amount of V. Lithiation at the 2-position is favored in the case of the Cl compound whereas Br-Li exchange is favored in the case of the Br compound I lithiated with BuLi and treated with HgBr2 gave bis(2-chloroferrocenyl)mercury (VI), m. 219-20°. Similarly bis(2,1′-dichloroferrocenyl)mercury was prepared Attempted capture of ferrocyne by heating VI in tetracyclone ended in failure, the product being IV.

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The reaction of an aromatic heterocycle with a proton is called a protonation. One of articles about this theory is 《Perylene and its derivatives. XLIX. The perylene trihalides of K. Brass and E. Clar》. Authors are Zinke, A.; Pongratz, A.; Scholtis, K.; Hanus, F..The article about the compound:Ethyl 3,5-Dimethyl-2-pyrrolecarboxylatecas:2199-44-2,SMILESS:O=C(C1=C(C)C=C(C)N1)OCC).Name: Ethyl 3,5-Dimethyl-2-pyrrolecarboxylate. Through the article, more information about this compound (cas:2199-44-2) is conveyed.

cf. C. A. 30, 6362.7. It had been shown that Brass and Clar’s “”perylene tribromide”” (C. A. 27, 720) is not a substance of constant composition and that the primary product of the action of Br on perylene is rather a tetrabromide. In a reply, B. and C. (C. A. 30, 6735.3) lay stress on the constancy in composition of their tribromide and deplore the fact that Z. and P. give the results of only 1 of the numerous analyses of their Br product. To meet this criticism a number of further bomb determinations are reported, although the authors believe their earlier data suffice to establish their contention. B. and C. also doubt the constancy of the composition of the tetrabromide and believe the higher Br values obtained by Z. and P. are due to the fact that they did not remove the excess of Br at an elevated temperature Some determinations are now reported in which the excess Br was removed with a current of warm (50-60°) air; they, too, show distinctly that 4 atoms Br are first taken up. Repeated treatment of the product with warm air showed that the loss in weight is at first due almost exclusively to evaporation of the mechanically attached Br, and when this ceases to be given off the compound has the composition of a tetrabromide. Further loss of Br as HBr occurs at an appreciably slower rate; a preparation kept in a desiccator for hrs. still contained considerably more Br than the amount calculated for a tribromide. The substance prepared by the action of I on perylene in hot benzene according to the (very incomplete) directions of B. and C. likewise has not a constant composition and was always found to contain more I than that calculated for a triiodide; the I content of the beautifully crystalline product depended on the concentration and the total amount of I dissolved in the benzene.

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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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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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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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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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