Tag: M.W:200-300

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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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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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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Recommanded Product: Bromoferrocene. 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 Synthesis of perfluoroalkylthio-substituted ferrocenes.

Mono- and bis(trifluoromethylthio)-substituted and perfluorooctanesulfonylferrocene derivatives were prepared by nucleophilic substitution reactions on the ferrocene core. Thus, Hg(SCF3)2 was activated in situ by Cu and used for nucleophilic displacement reactions of bromide. Trifluoromethylsulfonylferrocene was not accessible by this method. The reaction of lithioferrocene with trifluoromethylsulfonyl chloride gave chloroferrocene in small yield, presumably due to the high lattice energy of solid LiF. On the other hand, the known trifluoromethylferrocene was obtained as the only isolable compound from the photochem. reaction of CF3SSCF3 with ferrocene. The same product was detected in small amounts in the reaction of chloromercuryferrocene with trifluoromethylsulfonyl chloride. It thus appears that most established methods for trifluoromethylation of purely organic compounds fail for ferrocene due to concurring redox reactions. The new compounds have been comprehensively characterized by elemental analyses, NMR and IR spectroscopy, mass spectrometry, and electrochem. The SCF3 group appears to be almost as electron-withdrawing as a trifluoromethyl group on the ferrocene core.

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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 Measurements of structural and quadrupole coupling parameters for bromoferrocene using microwave spectroscopy, the main research direction is ferrocene bromo microwave spectroscopy; quadrupole coupling bromoferrocene; rotational spectra bromoferrocene; mol structure bromoferrocene.Application of 1273-73-0.

Rotational spectra for two isotopomers of bromoferrocene were measured using pulsed-beam Fourier transform microwave spectroscopy. Transitions were observed for the 79Br and 81Br isotopomers in the 5-9 GHz range. Rotational constants and the quadrupole coupling tensors were obtained. The rotational constants and quadrupole coupling parameters for 79Br are A = 1272.110(1), B = 516.1125(2), C = 441.3775(2), eQqaa=267.16(3), eQqab=-409.81(4), and eQqbb=21.49(4), and those for 81Br are A = 1271.045(4), B = 510.0079(2), C = 436.7687(2), eQqaa=225.40(6), eQqab=-341.62(4), and eQqbb=15.65(4). The measured rotational constants were used to determine the following structural parameters of bromoferrocene: r(Fe-(C5H5))=1.63(2), r(Fe-(C5H4Br))=1.67(3), r(C-Br)=1.875(11), and r(C-C)=1.433(1) A. The values of the quadrupole coupling parameters in the principal quadrupole axis systems and the C-Br bond axis systems are compared with similarly derived parameters for chloroferrocene, chlorobenzene, and bromobenzene. Previous data for chloroferrocene was reanalyzed to obtain refined quadrupole parameters.

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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 Crystal and molecular structure of the complex boron triferrocenyl-pyridine, the main research direction is crystal structure trisferrocenylboron pyridine complex; mol structure trisferrocenylboron pyridine complex; ferrocenylboron pyridine complex structure.Quality Control of Bromoferrocene.

X-ray study of the title tris(ferrocenyl)boron pyridine complex confirms that in the solid state its structure is similar to that inferred from chem. and spectroscopic evidence. The B atom is coordinated by 3 ferrocenyl groups and a pyridine ring in a distorted tetrahedral array. The mol. has a nearly 3-fold axis normal to the plane defined by the ferrocenyl groups. The B-N distance of 1.656 (5) Å is larger than that obtained for other compounds studied. The pyridine and cyclopentadienyl rings are planar. The H atoms of the cyclopentaidenyl rings are displaced significantly toward their corresponding Fe atom. The mols. in the crystal are packed at normal van der Waals distances. No unusually short intermol. contacts are noted.

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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.Tennyson, Andrew G.; Khramov, Dimitri M.; Varnado, C. Daniel; Creswell, Philip T.; Kamplain, Justin W.; Lynch, Vincent M.; Bielawski, Christopher W. researched the compound: Bromoferrocene( cas:1273-73-0 ).Electric Literature of C10BrFe.They published the article 《Indirectly Connected Bis(N-Heterocyclic Carbene) Bimetallic Complexes: Dependence of Metal-Metal Electronic Coupling on Linker Geometry》 about this compound( cas:1273-73-0 ) in Organometallics. Keywords: indirectly connected bis heterocyclic carbene diiron preparation electronic coupling; linker geometry electronic coupling imidazolylidene azido isothiocyanato ferrocene; crystal mol structure electrochem redox imidazolylidene azido isothiocyanato ferrocene. We’ll tell you more about this compound (cas:1273-73-0).

Reaction of 1,1′,3,3′-tetra(tert-amyl)benzobis(imidazolylidene) (1) with 2 equivalent of FcN3 or FcNCS afforded bisadducts [(FcN3)2(1)] (2) or [(FcNCS)2(1)] (3), resp. (Fc = ferrocene). These represent the first examples of complexes comprising metals indirectly connected to the carbene atoms of N-heterocyclic carbenes (NHCs) via their ligand sets. Cyclic and differential pulse voltammetry indicated that bis(NHC) 1 facilitated significant electronic coupling between ferrocene centers in 2 (ΔE = 140 mV), but not in 3. The different degrees of electronic interaction are due to geometric factors: the triazene linker in 2 is nearly coplanar with the bis(NHC) scaffold, whereas the isothiocyanate linker is orthogonal, as determined by x-ray crystallog. Employing this “”indirect connection”” strategy should enable tuning of metal-metal interactions by simple alteration the organic linker between NHC and MLn fragments rather than complete redesign thereof. Given that NHC-reactive azide or isothiocyanate groups can be incorporated into both organic and inorganic compounds, this approach is envisioned to facilitate access to otherwise inaccessible catalysts and materials.

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In general, if the atoms that make up the ring contain heteroatoms, such rings become heterocycles, and organic compounds containing heterocycles are called heterocyclic compounds. An article called Palladium-catalyzed enantioselective Heck alkenylation of trisubstituted allylic alkenols: a redox-relay strategy to construct vicinal stereocenters, published in 2017, which mentions a compound: 1428537-19-2, Name is (R)-4-(tert-Butyl)-2-(5-(trifluoromethyl)pyridin-2-yl)-4,5-dihydrooxazole, Molecular C13H15F3N2O, Related Products of 1428537-19-2.

An enantioselective, redox-relay Heck alkenylation of trisubstituted allylic alkenol substrates with alkenyl triflates was developed to afford alkenyl aldehydes/ketones e.g., I. This process enabled the construction of vicinal stereocenters in high diastereo- and enantioselectivity and allowed the formation of enolizable α-carbonyl methyl-substituted stereocenters with no observed epimerization under the reported reaction conditions.

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Khobragade, Dushant A.; Mahamulkar, Shraddha G.; Pospisil, Lubomir; Cisarova, Ivana; Rulisek, Lubomir; Jahn, Ullrich published an article about the compound: Bromoferrocene( cas:1273-73-0,SMILESS:Br[C-]12[Fe+2]3456789([C-]%10C6=C7C8=C9%10)C1=C3C4=C25 ).Product Details of 1273-73-0. Aromatic heterocyclic compounds can be classified according to the number of heteroatoms or the size of the ring. The authors also want to convey more information about this compound (cas:1273-73-0) through the article.

A series of mono- and 1,1′-diheteroatom-substituted ferrocene derivatives as well as acylated ferrocenes was prepared efficiently by a unified strategy that consists of selective mono- and 1,1′-dilithiation reactions and subsequent coupling with carbon, phosphorus, sulfur and halogen electrophiles. Chem. oxidation of the ferrocene derivatives by benzoquinone, 2,3-dichloro-5,6-dicyanobenzoquinone, AgPF6, or 2,2,6,6-tetramethyl-1-oxopiperidinium hexafluorophosphate provided the corresponding ferrocenium salts. The redox potentials of the synthesized ferrocenes were determined by cyclic voltammetry, and it was observed that all new ferrocenium salts have stronger oxidizing properties than standard ferrocenium hexafluorophosphate. An initial application of selected derivatives in an oxidative bicyclization revealed that they mediate the transformation under considerably milder conditions than ferrocenium hexafluorophosphate. Quantum chem. calculations of the reduction potentials of the substituted ferrocenium ions were carried out by using a standard thermodn. cycle that involved the gas-phase energetics and solvation energies of the contributing species. A remarkable agreement between theory and experiment was found: the mean average deviation amounted to only 0.030 V and the maximum deviation to 0.1 V. This enabled the anal. of various phys. contributions to the computed reduction potentials of these ferrocene derivatives, thereby providing insight into their electronic structure and physicochem. properties.

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Computed Properties of C10BrFe. 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 Oxidative purification of halogenated ferrocenes. Author is Inkpen, Michael S.; Du, Shuoren; Driver, Mark; Albrecht, Tim; Long, Nicholas J..

Authors report the large scale syntheses and oxidative purification’ of fcI2, fcBr2 and FcBr (fc = ferrocene-1,1′-diyl, Fc = ferrocenyl). These valuable starting materials are typically laborious to sep. via conventional techniques, but can be readily isolated by taking advantage of their increased E1/2 relative to FcH/FcX contaminants. The work extends this methodol. towards a generic tool for the separation of redox active mixtures

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