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A mononuclear non-heme Mn(III)-aqua complex, [(dpaq)MnIII(OH2)]2+ (1, dpaq = 2-[bis(pyridin-2-ylmethyl)]amino-N-quinolin-8-yl-acetamidate), is capable of conducting hydrogen atom transfer (HAT) reactions much more efficiently than the corresponding Mn(III)-hydroxo complex, [(dpaq)MnIII(OH)]+ (2); the high reactivity of 1 results from the positive one-electron reduction potential of 1 (Ered vs SCE = 1.03 V), compared to that of 2 (Ered vs SCE = -0.1 V). The HAT mechanism of 1 varies between electron transfer followed by proton transfer and one-step concerted proton-coupled electron transfer, depending on the one-electron oxidation potentials of substrates. To the best of our knowledge, this is the first example showing that metal(III)-aqua complex can be an effective H-atom abstraction reagent.

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Reference：
Iron Catalysis in Organic Synthesis | Chemical Reviews,
Iron Catalysis in Organic Synthesis: A Critical Assessment of What It Takes To Make This Base Metal a Multitasking Champion

Chemical engineers ensure the efficiency and safety of chemical processes, adapt the chemical make-up of products to meet environmental or economic needs, and apply new technologies to improve existing processes. Quality Control of 1,1′-Dibromoferrocene. Catalysts allow a reaction to proceed via a pathway that has a lower activation energy than the uncatalyzed reaction. Introducing a new discovery about 1293-65-8, Name is 1,1′-Dibromoferrocene

A novel polar dppf derivative possessing only planar chirality, 1?,2-bis(diphenylphosphino)-ferrocene-1-carboxylic acid (Hdpc), has been synthesised in racemic form and resolved into enantiomers via esters with d-glucose diacetonide ((Rp)- and (Sp)-3). (R p)-Hdpc was further converted to a series of N-substituted amides that were studied as ligands for Pd-catalysed enantioselective allylic alkylation of racemic (E)-1,3-diphenylprop-2-en-1-yl acetate or ethyl carbonate with malonate esters, showing high activity and good enantioselectivity (er up to 10: 90). The catalytic results were correlated with the structural data (X-ray diffraction and solution NMR) for (eta3-allyl)palladium(ii) complex (Rp)-[Pd(eta3-1,3-Ph2C 3H3){Fe(eta5-C5H 3-1-(C(O)NHCH2Ph)-2-(PPh2-kappaP)) (eta5-C5H4PPh2-kappaP)}]ClO 4 (16) as a model of the plausible reaction intermediate. A further study into the coordination properties of Hdpc led to isolation of chelate complex [PdCl2(Hdpc-kappa2P,P?)] (12). The crystal structures of rac-Hdpc, methyl ester of (Rp)-Hdpc, glycoside (R p)-3, and 12·Me2CO suggested a close structural relationship between dppf and Hdpc. The Royal Society of Chemistry and the Centre National de la Recherche Scientifique 2009.

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Reference：
Iron Catalysis in Organic Synthesis | Chemical Reviews,
Iron Catalysis in Organic Synthesis: A Critical Assessment of What It Takes To Make This Base Metal a Multitasking Champion

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Various metalloligands and inorganic-organic hybrid bridging ligands have been incorporated in polynuclear complexes and bimetallic coordination polymers. Ferrocene, exhibiting redox activity and facile chemical modification, is a versatile metalloligand component. However, most metal complexes with ferrocene-containing ligands form discrete low-dimensional chelate complexes or coordination polymers. Thus, we designed and synthesized ferrocene-based multidentate ligands, 1,2-di(4-pyridylthio)ferrocene (L1) and 1,2-di(2-pyridylthio)ferrocene (L2). Here we report the synthesis and structures of molecular square complexes and coordination polymers containing L1, which reacted with M(hfac)2 (hfac = 1,1,1,5,5,5-hexafluoroacetylacetonate) and AgCF3SO3 to yield molecular square complexes [M(hfac)2(L1)]2·2C6H5CH3 [M = Ni (1) and Co (2)] and [Ag(CF3SO3)(L1)(H2O)0.5]2·2CH2Cl2·H2O (3). The molecular square units comprise two metal ions bridged by two ligands. Isomorphic complexes 1 and 2 accommodate two toluene molecules above and below the molecular square. L1 reacted with Cu(hfac)2 and CuI to yield zigzag, {[Cu(hfac)2(L1)]}n·0.25n(CH2Cl2) (4), and ribbon-shaped, {[Cu4I4(L1)2]}n (5), coordination polymers. In 4, L1 behaves as a bidentate N,N-ligand bridging the CuII ions, while in 5 it acts as a tridentate S,N,N-ligand linking the stepped-cubane Cu4I4 units. L1 reacted with AgX to form two-dimensional coordination polymers {[Ag(ClO4)(L1)]}n (6) and {[Ag(L1)]PF6}n (7), in which it acted as a tetradentate S,S,N,N-ligand. These complexes have topologies based on multidentate coordination of 1,2-substituted L1.

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Reference：
Iron Catalysis in Organic Synthesis | Chemical Reviews,
Iron Catalysis in Organic Synthesis: A Critical Assessment of What It Takes To Make This Base Metal a Multitasking Champion

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We have measured the optical absorption of gaseous ferrocene, 1,1 prime -dimethylferrocene, 1,1 prime -dibromoferrocene, and 1,1 prime -dichloroferrocene using synchrotron radiation. From these data we have estimated the ligand field parameters and noted increasing e//2//g(d) to Cp( pi ) overlap with increasing charge transfer from the Cp ring to the substitution. The optical absorption spectra for ferrocene, dibromoferrocene, and dichloroferrocene are remarkably similar. The halogen substitutions result in greater Cp( pi ) to e//2//g-(d(x2-y2)) hybridization. The e//2//g orbitals become more bonding while the a//1//g and e//1//g orbitals become more non-bonding or antibonding. This change is reflected in a change of the ligand field parameters.

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Reference：
Iron Catalysis in Organic Synthesis | Chemical Reviews,
Iron Catalysis in Organic Synthesis: A Critical Assessment of What It Takes To Make This Base Metal a Multitasking Champion

Chemical engineers ensure the efficiency and safety of chemical processes, adapt the chemical make-up of products to meet environmental or economic needs, and apply new technologies to improve existing processes. Related Products of 1293-65-8. Catalysts allow a reaction to proceed via a pathway that has a lower activation energy than the uncatalyzed reaction. Introducing a new discovery about 1293-65-8, Name is 1,1′-Dibromoferrocene

Modifying the reactivity of substrates by encapsulation is a fundamental principle of capsule catalysis. Here we show an alternative strategy, wherein catalytic activation of otherwise inactive quinone “co-factors” by a simple Pd2L4 capsule promotes a range of bulk-phase, radical-cation cycloadditions. Solution electron-transfer experiments and cyclic voltammetry show that the cage anodically shifts the redox potential of the encapsulated quinone by a significant 1 V. Moreover, the capsule also protects the reduced semiquinone from protonation, thus transforming the role of quinones from stoichiometric oxidants into catalytic single-electron acceptors. We envisage that the host-guest-induced release of an “electron hole” will translate to various forms of non-encapsulated catalysis that involve other difficult-to-handle, highly reactive species.

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Reference：
Iron Catalysis in Organic Synthesis | Chemical Reviews,
Iron Catalysis in Organic Synthesis: A Critical Assessment of What It Takes To Make This Base Metal a Multitasking Champion

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[Problem] measuring telomerase activity of the compounds. [Solution] type I (R1 The alkylene group of C1 a-6; R2 , R3 And R4 The alkyl group is C1 a-3; and n is 0 or 1 m is, at least one of 1) naphtha range imido derivative. [Drawing] no (by machine translation)

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Iron Catalysis in Organic Synthesis | Chemical Reviews,
Iron Catalysis in Organic Synthesis: A Critical Assessment of What It Takes To Make This Base Metal a Multitasking Champion

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Conjugated microporous polymers (CMPs) have full access to the organic synthesis toolbox and feature-rich functionality, structural diversity, and high surface area. We incorporated ferrocene (Fc) into the backbones of CMPs and systematically engineered their optical energy gaps. Compared with the CMPs without Fc units yet adopting a similar molecular orbital level, Fc-based CMPs can sufficiently generate reactive oxygen species (ROS) under visible light. The resultant ROS are able to effectively decompose the absorbed pollutants, including organic dyes and chemical warfare agents. Specifically, Fc-based CMPs significantly outperform commercial TiO2 (P25) in the degradation of methylene blue and are capable of converting 2-chloroethyl ethyl sulfide (a mustard gas simulant) into a completely nontoxic product.

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Reference：
Iron Catalysis in Organic Synthesis | Chemical Reviews,
Iron Catalysis in Organic Synthesis: A Critical Assessment of What It Takes To Make This Base Metal a Multitasking Champion

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A series of thiophene tungsten Fischer carbene complexes of type [(CO)5W=C(OMe)R] (1, R = 2-Th; 4, R = fcthFc) and [(CO)5W=C(OMe)-R?-(OMe)C=W(CO)5] (2, R? = th; 5, R? = fcthfc) was synthesized for investigating low energy charge transfer interactions between the carbene substituents and the transition metal carbonyl fragment incorporating the thiophene heterocyclic system (Th = Thienyl; th = 2,5-thiendiyl; Fc = ferrocenyl; fc = 1,1?-ferrocenediyl). Electrochemical investigations were carried out on these complexes to get a closer insight into the electronic properties of 1, 2, 4 and 5. Typical electrode reactions could be found for the carbene reductions itself and for the tungsten carbonyl oxidation processes in all metal carbene complexes. However, for the thiophene complex 2 two well-separated one-electron reduction events were observed, suggesting an interaction of the Fischer carbene moieties in 2-, over the thiophene bridge. Reversible one-electron redox events for the ferrocenyl moieties in complexes 4 and 5 were also observed. During the UV-Vis-NIR spectroelectrochemical investigations typical low energy absorptions for the mixed-valent alpha,alpha?-diferrocenyl thiophene increment were found for these two complexes, as well as high energy NIR absorptions, which were attributed to metal-metal charge transfer transition between the tungsten carbonyl increment and the ferrocenyl units (complexes 4 and 5). Further infrared spectroelectrochemical studies reveal that the electronic interactions between the tungsten carbene and the ferrocenyl electrophores in the corresponding cationic species (4+, 42+, 5+, 52+) can be described with weakly coupled class II systems according to Robin and Day.

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Iron Catalysis in Organic Synthesis | Chemical Reviews,
Iron Catalysis in Organic Synthesis: A Critical Assessment of What It Takes To Make This Base Metal a Multitasking Champion

You could be based in a university, combining chemical research with teaching; in a pharmaceutical company, working on developing and trialing new drugs; name: 1,1′-Dibromoferrocene, or in a public-sector research center, helping to ensure national healthcare provision keeps pace with new discoveries.In a article, mentioned the application of 1293-65-8, Name is 1,1′-Dibromoferrocene, molecular formula is C10Br2Fe

Two homologous ferrocene phosphanylcarboxylic acids, viz., 1?-[(diphenylphosphanyl)methyl]ferrocene-1-carboxylic acid (HL1) and [1?-(diphenylphosphanyl)ferrocenyl]acetic acid (HL2), were synthesized and studied as ligands in PdII complexes. The addition of these hybrid donors to [PdCl2(MeCN)2] led to the bis-phosphane complexes trans-[PdCl2(HL1-kappaP)2] and trans-[PdCl2(HL2-kappaP)2]. In contrast, the reactions of HL1 and HL2 with the PdII acetylacetonate (acac) complexes [(LYC)Pd(acac)], where LYC = 2-[(dimethylamino-kappaN)methyl]phenyl-kappaC1 (LNC) and 2-[(methylthio-kappaS)methyl]phenyl-kappaC1 (LSC), proceeded under proton transfer and replacement of the acac ligand, giving rise to O,P-bridged phosphanylcarboxylate dimers [LYCPd(mu(P,O)-L1)]2 and molecular chelates [LYCPd(L2-kappa2O,P)]2, respectively. The analogous reactions involving 1?-(diphenylphosphanyl)-1-ferrocenecarboxylic acid (Hdpf) provided the macrocyclic tetramer [LNCPd(mu(P,O)-dpf)]4 and the dimer [LSCPd(mu(P,O)-dpf)]2. The reactions of HL1 with [Pd(acac)2] only led to an ill-defined, insoluble material, whereas those with HL2 produced a separable mixture of the bis-chelate complexes trans-[Pd(L2-kappa2O,P)2], cis-[Pd(L2-kappa2O,P)2], and [Pd(acac)(L2-kappa2O,P)].

The result showed that such a combination of chemo- and biocatalysis improved the catalytic yield more than two times compared with that of sole metal catalysis. We will look forword to the important role of 1293-65-8, and how the biochemistry of the body works.name: 1,1′-Dibromoferrocene

Reference：
Iron Catalysis in Organic Synthesis | Chemical Reviews,
Iron Catalysis in Organic Synthesis: A Critical Assessment of What It Takes To Make This Base Metal a Multitasking Champion

Application of 1293-65-8, Chemistry graduates have much scope to use their knowledge in a range of research sectors, including roles within chemical engineering, chemical and related industries, healthcare and more. 1293-65-8, Name is 1,1′-Dibromoferrocene, molecular weight is 335.76. In an Article，once mentioned of 1293-65-8

A new potentially C3-symmetric phosphine ligand ‘manphos’ has been obtained and fully characterized. The ligand which is a tri-ferrocenyl-tetra-phosphine is obtained in a simple and effective two step synthesis starting from 1,1?-dibromoferrocene via the intermediate compound tris-(1?-bromoferrocenyl)phosphine or alternatively via 1′-bromo-1-diphenylphosphinoferrocene. The iso -propylphosphino-analogue of manphos, tris-(1′-diisopropylphosphinoferrocenenyl)phosphine, has also been obtained, in addition to several functionalised derivatives of triferrocenylphosphine where the ferrocene rings have been substituted in the 1?-position.

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Reference：
Iron Catalysis in Organic Synthesis | Chemical Reviews,
Iron Catalysis in Organic Synthesis: A Critical Assessment of What It Takes To Make This Base Metal a Multitasking Champion