Tag: M.W:200-300

SDS of cas: 1273-73-0. Aromatic heterocyclic compounds can also be classified according to the number of heteroatoms contained in the heterocycle: single heteroatom, two heteroatoms, three heteroatoms and four heteroatoms. Compound: Bromoferrocene, is researched, Molecular C10BrFe, CAS is 1273-73-0, about Electronic effects in the ferrocene ring system by proton magnetic resonance spectroscopy. Author is Slocum, D. W.; Engelmann, T. R.; Lewis, Robert; Kurland, R. J..

Results of a proton magnetic resonance study of the chem. shifts of ring protons of representative monosubstituted ferrocene compounds are reported. The substituents cover a span from strongly electron-donating groups to strongly electron-withdrawing. Some relations appear to exist between the ring-proton chem. shifts in these compounds and those reported for the corresponding monosubstituted benzene compounds The chem. shifts recorded were precisely measured. As such, they serve to revise the data reported while this work was in progress. 15 references.

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The reaction of an aromatic heterocycle with a proton is called a protonation. One of articles about this theory is 《Reaction of metallocenes with thiocyanogen》. Authors are Dove, M. F. A.; Sowerby, D. B..The article about the compound:Bromoferrocenecas:1273-73-0,SMILESS:Br[C-]12[Fe+2]3456789([C-]%10C6=C7C8=C9%10)C1=C3C4=C25).Computed Properties of C10BrFe. Through the article, more information about this compound (cas:1273-73-0) is conveyed.

An Et2O solution of (SCN)2 was added slowly to a solution of ferrocene to give a dark brown, unidentified powder, which was not a simple thiocyanate, although ferricinium ions were present. Using CH2 Cl2 as solvent a darkcolored crystalline product [(C5H5)2Fe]2Fe(NCS)4 precipitated Ir spectra showed strong bands at 3095, 1414, 1010, and 850 cm.-1 characteristic of the ferricinium ion and at 2055, 480, and 262 cm.-1 due to the iron thiocyanate group. The electronic spectrum in a KBr disk showed a strong maximum at 20.3 kK with a shoulder at 15.8 kK. An analogous reaction between cobaltocene and (SCN)2 in Et2 O at room temperature yielded as the main product yellow crystalline cobalticinium thiocyanate as shown by elemental anal., ir and electronic spectra, conductivity, and proton N.M.R.

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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 Interaction of cerium(IV) acetylacetonate with organometallic compounds, the main research direction is cerium acetylacetonato; sodium cerium acetylacetonato; lithium cerium acetylacetonato; cyclopentadienylsodium acetylacetonatocerium reaction; ferrocenyllithium acetylacetonatocerium reaction; naphthylsodium acetylacetonatocerium reaction.Name: Bromoferrocene.

L4Ce (L = acetylacetonato) was prepared in 70% yields by treating Ce(SO4)2.2(NH4)2SO4 with LH and its reaction with cyclopentadienylsodium (I), ferrocenyllithium and naphthylsodium studied. Thus, treating L4Ce with I gave 83% NaCeL4.

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Pickett, Tom E.; Richards, Christopher J. 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 ).Recommanded Product: 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.

The effect of 29 commonly encountered substituents on the chem. shifts of α, β and C5H5 positions in monosubstituted ferrocenes are tabulated and employed for determining 1H NMR assignments in 1,2- and 1,1′-disubstituted ferrocene derivatives

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In organic chemistry, atoms other than carbon and hydrogen are generally referred to as heteroatoms. The most common heteroatoms are nitrogen, oxygen and sulfur. Now I present to you an article called Action of halogens on ferrocenylgold-triphenylphosphine, published in 1971, which mentions a compound: 1273-73-0, mainly applied to ferrocenyl gold phosphine bromination, Reference of Bromoferrocene.

Ph3P.AuC5H4FeC5H5 (I) brominated in CCl4 at -20° to a blue, then yellow material and after evaporation gave 55% bromoferrocene and 18% biferrocenyl along with 70% Ph3P.AuBr. Similar results were obtained at -50° in CH2Cl2. I chlorinated as above to 26% chloroferrocene, 70% biferrocenyl, and 98% Ph3P.AuCl. Iodination gave 82% iodoferrocene and 89% Ph3P.AuI.

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Fukuzumi, Shunichi; Kotani, Hiroaki; Prokop, Katharine A.; Goldberg, David P. published the article 《Electron- and Hydride-Transfer Reactivity of an Isolable Manganese(V)-Oxo Complex》. Keywords: electron hydride transfer reactivity isolable manganese oxo complex.They researched the compound: Bromoferrocene( cas:1273-73-0 ).Synthetic Route of C10BrFe. Aromatic heterocyclic compounds can be divided into two categories: single heterocyclic and fused heterocyclic. In addition, there is a lot of other information about this compound (cas:1273-73-0) here.

The electron-transfer and hydride-transfer properties of an isolated manganese(V)-oxo complex, (TBP8Cz)MnV(O) (1) (TBP8Cz = octa-tert-corrolazinato) were determined by spectroscopic and kinetic methods. The manganese(V)-oxo complex 1 reacts rapidly with a series of ferrocene derivatives ([Fe(C5H4Me)2], [Fe(C5HMe4)2], and [Fe(C5Me5)2] = Fc*) to give the direct formation of [(TBP8Cz)MnIII(OH)]- ([2-OH]-), a two-electron-reduced product. The stoichiometry of these electron-transfer reactions was found to be (Fc derivative)/1 = 2:1 by spectral titration The rate constants of electron transfer from ferrocene derivatives to 1 at room temperature in benzonitrile were obtained, and the successful application of Marcus theory allowed for the determination of the reorganization energies (λ) of electron transfer. The λ values of electron transfer from the ferrocene derivatives to 1 are lower than those reported for a manganese(IV)-oxo porphyrin. The presumed one-electron-reduced intermediate, a MnIV complex, was not observed during the reduction of 1. However, a MnIV complex was successfully generated via one-electron oxidation of the MnIII precursor complex 2 to give [(TBP8Cz)MnIV]+ (3). Complex 3 exhibits a characteristic absorption band at λmax = 722 nm and an EPR spectrum at 15 K with g’max = 4.68, g’mid = 3.28, and g’min = 1.94, with well-resolved 55Mn hyperfine coupling, indicative of a d3 MnIVS = 3/2 ground state. Although electron transfer from [Fe(C5H4Me)2] to 1 is endergonic (uphill), two-electron reduction of 1 is made possible in the presence of proton donors (e.g., CH3CO2H, CF3CH2OH, and CH3OH). In the case of CH3CO2H, saturation behavior for the rate constants of electron transfer (ket) vs. acid concentration was observed, providing insight into the critical involvement of H+ in the mechanism of electron transfer. Complex 1 was also shown to be competent to oxidize a series of dihydronicotinamide adenine dinucleotide (NADH) analogs via formal hydride transfer to produce the corresponding NAD+ analogs and [2-OH]-. The logarithms of the observed second-order rate constants of hydride transfer (kH) from NADH analogs to 1 are linearly correlated with those of hydride transfer from the same series of NADH analogs to p-chloranil.

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Product Details of 63352-97-6. The mechanism of aromatic electrophilic substitution of aromatic heterocycles is consistent with that of benzene. Compound: 2-(7-Bromo-1H-indol-3-yl)acetic acid, is researched, Molecular C10H8BrNO2, CAS is 63352-97-6, about Molecular recognition of indole derivatives by polymers imprinted with indole-3-acetic acid: A QSPR study. Author is Porobic, Ivana; Kontrec, Darko; Soskic, Milan.

Three molecularly imprinted polymers (MIPs) were prepared using the phytohormone indole-3-acetic acid (IAA) as a template mol., 4-vinylpyridine (MIP-1 and MIP-2) or N,N-dimethylaminoethyl methacrylate (MIP-3) as functional monomers, ethylenglycol dimethacrylate as a cross linker and acetonitrile (MIP-1), a methanol-water mixture (MIP-2) or chloroform (MIP-3) as porogens. Retention factors for IAA and 29 indole derivatives were determined by high-performance liquid chromatog., using the molecularly imprinted polymers as stationary phases and acetonitrile as an eluent. High correlations between selectivity factors of above mentioned polymers indicate that their retention mechanisms are basically the same. A quant. structure-property relationships anal. revealed that the presence of the terminal carboxyl group on the 3-side chain plays an essential role in the binding of the indole derivatives to the polymers. The derivatives without the carboxyl group exhibit a drastically lower affinity toward the polymers. Another factor which favors the binding is electronic d. of indole nucleus. Substituents with electro-withdrawing properties enhance the binding, while electro-donating substituents have the opposite effect. The length of the 3-side chain also affects the binding. Indole-3-carboxylic acid having the carboxyl group directly attached to the ring as well as the derivatives whose side chain is longer than that of IAA bind to the polymers with a lower affinity.

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Application of 1273-73-0. The mechanism of aromatic electrophilic substitution of aromatic heterocycles is consistent with that of benzene. Compound: Bromoferrocene, is researched, Molecular C10BrFe, CAS is 1273-73-0, about Triferrocenyl complexes of tungsten(VI): the molecular structure in the solid state and dynamic behavior in solution of triferrocenyl(ferrocenyloxy)oxotungsten, WO(OFc)Fc3. Author is Herberhold, Max; Kniesel, Heidemarie; Haumaier, Ludwig; Thewalt, Ulf.

WO(X)Fc3 [X = Cl (I), OMe (II), OFc (III), OBu (IV); Fc = ferrocenyl] were obtained by treating WOCl4 with ferrocenyllithium in THF. Reaction of WOCl4 with a threefold excess of FcLi gives I, which may be converted into II using KOMe. Reaction of WOCl4 with a sixfold excess of FcLi gives a mixture containing III and IV in addition to ferrocene and biferrocene. According to the x-ray crystallog. anal., III has a trigonal-bipyramidal structure with three ferrocenyl ligands occupying the equatorial positions and an axial ferrocenoxy group coordinated trans to the oxo ligand. The three W-C(ferrocenyl) (average 2.092 Å) and the O-C(ferrocenyl) [1.33(1) Å] bond distances are remarkably short. The axial tungsten-oxygen distances correspond to a W:O double and a W-O single bond, resp. The 1H and 13C NMR spectra of III are temperature dependent because of a hindered rotation of the ferrocenyl ligands around the W-C(ferrocenyl) bonds.

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Most of the compounds have physiologically active properties, and their biological properties are often attributed to the heteroatoms contained in their molecules, and most of these heteroatoms also appear in cyclic structures. A Journal, Article, Research Support, U.S. Gov’t, Non-P.H.S., Macromolecular Rapid Communications called Electrochromic Poly(acetylene)s with Switchable Visible/Near-IR Absorption Characteristics, Author is Pauly, Anja C.; Varnado, C. Daniel Jr.; Bielawski, Christopher W.; Theato, Patrick, which mentions a compound: 1273-73-0, SMILESS is Br[C-]12[Fe+2]3456789([C-]%10C6=C7C8=C9%10)C1=C3C4=C25, Molecular C10BrFe, Quality Control of Bromoferrocene.

Ferrocene is incorporated into a poly(acetylene) derivative via the postpolymn. amidation of a polymer precursor bearing pentafluorophenyl ester-leaving groups with aminoferrocene. While the neutral polymer exhibits a strong absorbance at 553 nm due to its conjugated backbone, oxidation of the ferrocene moieties with silver tetrafluoroborate causes the material to absorb in the near-IR (λmax ≈1215 nm). Subsequent reduction of the oxidized polymer with decamethylferrocene restores the initial absorbance profile, demonstrating that the material features switchable visible/near-IR absorption characteristics.

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Reference of (R)-4-(tert-Butyl)-2-(5-(trifluoromethyl)pyridin-2-yl)-4,5-dihydrooxazole. 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: (R)-4-(tert-Butyl)-2-(5-(trifluoromethyl)pyridin-2-yl)-4,5-dihydrooxazole, is researched, Molecular C13H15F3N2O, CAS is 1428537-19-2, about 11-Step Total Synthesis of Teleocidins B-1-B-4.

A unified and modular approach to the teleocidin B family of natural products is presented that proceeds in 11 steps and features an array of interesting strategies and methods. Indolactam V, the known biosynthetic precursor to this family, was accessed through electrochem. amination, Cu-mediated aziridine opening, and a remarkable base-induced macrolactamization. Guided by a desire to minimize concession steps, the tactical combination of C-H borylation and a Sigman-Heck transform enabled the convergent, stereocontrolled synthesis of the teleocidins.

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