Category: 18346-57-1

Sengupta, Debabrata published the artcileIsolation of a Bimetallic Cobalt(III) Nitride and Examination of Its Hydrogen Atom Abstraction Chemistry and Reactivity toward H₂, Application of Cobalt(II) dibromo(1,2-dimethoxyethane), the publication is Journal of the American Chemical Society (2020), 142(18), 8233-8242, database is CAplus and MEDLINE.

Room temperature photolysis of the bis(azide)cobaltate(II) complex [Na(THF)_x][(^ketguan)Co(N₃)₂] (^ketguan = [(tBu₂CN)C(NDipp)₂]^–, Dipp = 2,6-diisopropylphenyl) (3a) in THF cleanly forms the binuclear Co nitride Na(THF)₄{[(^ketguan)Co(N₃)]₂(μ-N)} (1). Compound 1 represents the 1st example of an isolable, bimetallic Co nitride complex, and it was fully characterized by spectroscopic, magnetic, and computational analyses. D. functional theory supports a Co^III=N=Co^III canonical form with significant π-bonding between the Co centers and the nitride atom. Unlike other Group 9 bridging nitride complexes, no radical character is detected at the bridging N atom of 1. Indeed, 1 is unreactive toward weak C-H donors and even co-crystallizes with a mol. of cyclohexadiene (CHD) in its crystallog. unit cell to give 1·CHD as a room temperature stable product. Notably, addition of pyridine to 1 or photolyzed solutions of [(^ketguan)Co(N₃)(py)]₂ (4a) leads to destabilization via activation of the nitride unit, resulting in the mixed-valent Co(II)/Co(III) bridged imido species [(^ketguan)Co(py)][(^ketguan)Co](μ-NH)(μ-N₃) (5) formed from intermol. H atom abstraction (HAA) of strong C-H bonds (BDE ~100 kcal/mol). Kinetic rate anal. of the formation of 5 in the presence of C₆H₁₂ or C₆D₁₂ gives a KIE = 2.5 ± 0.1, supportive of a HAA formation pathway. The reactivity of the authors’ system was further probed by photolyzing benzene/pyridine solutions of 4a under H₂ and D₂ atms. (150 psi), which leads to the exclusive formation of the bis(imido) complexes [(^ketguan)Co(μ-NH)]₂ (6) and [(^ketguan)Co(μ-ND)]₂ (6-D), resp., as a result of dihydrogen activation. These results provide unique insights into the chem. and electronic structure of late 3d metal nitrides while providing entryway into C-H activation pathways.

Journal of the American Chemical Society published new progress about 18346-57-1. 18346-57-1 belongs to bromides-buliding-blocks, auxiliary class Cobalt, name is Cobalt(II) dibromo(1,2-dimethoxyethane), and the molecular formula is C7H5Br2F, Application of Cobalt(II) dibromo(1,2-dimethoxyethane).

Referemce:
https://en.wikipedia.org/wiki/Bromide,
bromide – Wiktionary

Farley, Conner M. published the artcileCatalytic [5 + 1]-Cycloadditions of Vinylcyclopropanes and Vinylidenes, Name: Cobalt(II) dibromo(1,2-dimethoxyethane), the publication is Journal of the American Chemical Society (2020), 142(10), 4598-4603, database is CAplus and MEDLINE.

Polysubstituted cyclohexenes bearing 1,3 (meta) substitution patterns are challenging to access using the Diels-Alder reaction (the ortho-para rule). Here, a cobalt-catalyzed reductive [5 + 1]-cycloaddition between a vinylcyclopropane and a vinylidene to provide methylenecyclohexenes bearing all-meta relationships has been reported. Vinylidene equivalent are generated from 1,1-dichloroalkenes using Zn as a stoichiometric reductant. Exptl. observations are consistent with a mechanism involving a cobaltacyclobutane formed from a [2 + 2]-cycloaddition between a cobalt vinylidene and a vinylcyclopropane.

Journal of the American Chemical Society published new progress about 18346-57-1. 18346-57-1 belongs to bromides-buliding-blocks, auxiliary class Cobalt, name is Cobalt(II) dibromo(1,2-dimethoxyethane), and the molecular formula is C4H10Br2CoO2, Name: Cobalt(II) dibromo(1,2-dimethoxyethane).

Referemce:
https://en.wikipedia.org/wiki/Bromide,
bromide – Wiktionary

Fowles, Gerald W. A. published the artcileDonor properties of simple ethers. II. Complexes of manganese(II), iron(II), cobalt(II) and nickel(II) halides with tetrahydrofuran and 1,2-dimethoxyethane, Name: Cobalt(II) dibromo(1,2-dimethoxyethane), the publication is Journal of Inorganic and Nuclear Chemistry (1969), 31(10), 3119-31, database is CAplus.

The reactions of several dihalides of Mn(II), Fe(II), Co(II), Ni(II), cu (II), and Cd(II), and Fe(III) chloride with tetrahydrofuran and 1,2-dimethoxyethane have been investigated and the following complexes prepared: MCl2.1.5-C4H8O (M = Mn, Fe, or Co), CoX2.C4H8O (X = Br or I), NiCl2.C4H8O.EtOH, MX2.C4H10O2 (M = Mn, Fe, Co, Ni, or Cd and X = Cl, Br, or I), FeCl3.C4H10O2, and 2CuCl2.C4H10O2. The structures of several of these complexes have been deduced from a study of their electronic spectra, far-ir spectra, and room temperature magnetic properties. However, the magnetic moments of several of these complexes (e.g. pseudotetrahedral CoX2.-C4H10O2) are unusual in that they exhibit marked temperature dependence, although the ground state formally is an orbital singlet. The tetrahydrofuran derivatives MCl2.1.5C4H8O are of unusual stoichiometry, and while it is suggested that these products are a 1:1 mixture of tetrahedral CoCl2.2C4H8O and octahedral CoCl2.C4H8O their structure remains in some doubt.

Journal of Inorganic and Nuclear Chemistry published new progress about 18346-57-1. 18346-57-1 belongs to bromides-buliding-blocks, auxiliary class Cobalt, name is Cobalt(II) dibromo(1,2-dimethoxyethane), and the molecular formula is C4H10Br2CoO2, Name: Cobalt(II) dibromo(1,2-dimethoxyethane).

Referemce:
https://en.wikipedia.org/wiki/Bromide,
bromide – Wiktionary

Bauer, Heiko published the artcileChromocene, ferrocene, cobaltocene, and nickelocene derivatives with isopropyl and methyl or trimethylsilyl substituents, Application of Cobalt(II) dibromo(1,2-dimethoxyethane), the publication is Journal of Organometallic Chemistry (2016), 63-73, database is CAplus.

From sodium 2,3-diisopropyl-1,4-dimethyl-cyclopentadienide and MBr₂(dme) (M = Fe, Co, Ni) the corresponding ferrocene (1), cobaltocene (2) and nickelocene (3) could be obtained as pure, crystalline solids. From an analogous reaction of sodium 2,3,5-triisopropyl-1,4-dimethyl-cyclopentadienide with FeCl₂, only the mixed-substituted ferrocene (³₂Cp)(²₂Cp)Fe (4) could be crystallized (³₂Cp = 2,3,5-triisopropyl-1,4-dimethyl-cyclopentadienyl, ²₂Cp = 2,3-diisopropyl-1,4-dimethyl-cyclopentadienyl). The trimethylsilyl substituted ferrocene (5) and nickelocene (6) were synthesized from the corresponding metal halides and potassium 2,3-diisopropyl-1,4-dimethyl-5-trimethylsilyl-cyclopentadienide as well as a series of chromocenes with silylated or alkylated cyclopentadienyl ligands (7–10) from chromium(II) acetate. Octaisopropylnickelocene (11) has been obtained and converted to octaisopropylnickelocenium hexafluorophosphate (12). 1,2,3,4-Tetraisopropylnickelocenium tetrabromoaluminate (13) was obtained from tetraisopropylcyclopentadienylnickel(II) tetrabromoaluminate and nickelocene. Crystal structures have been obtained for metallocenes 1–5, 7–9, and 11.

Journal of Organometallic Chemistry published new progress about 18346-57-1. 18346-57-1 belongs to bromides-buliding-blocks, auxiliary class Cobalt, name is Cobalt(II) dibromo(1,2-dimethoxyethane), and the molecular formula is C4H10Br2CoO2, Application of Cobalt(II) dibromo(1,2-dimethoxyethane).

Referemce:
https://en.wikipedia.org/wiki/Bromide,
bromide – Wiktionary

Huang, Weichen published the artcileCobalt-Catalyzed Asymmetric Cross-Coupling Reaction of Fluorinated Secondary Benzyl Bromides with Lithium Aryl Boronates/ZnBr₂, Recommanded Product: Cobalt(II) dibromo(1,2-dimethoxyethane), the publication is Organic Letters (2020), 22(11), 4327-4332, database is CAplus and MEDLINE.

A cobalt-catalyzed asym. cross-coupling of α-bromo-α-fluorotoluene derivatives with a variety of aryl zincates derived from lithium aryl Bu pinacol boronates and ZnBr₂ under mild reaction conditions was described. In addition to mild reaction conditions, another advantage includes the compatibility of various common functional groups such as fluoride, chloride, bromide, cyano, or ester groups. Furthermore, this protocol was successfully applied to the enantioselective synthesis of three fluorinated derivatives of biol. active compounds or drug mols.

Organic Letters published new progress about 18346-57-1. 18346-57-1 belongs to bromides-buliding-blocks, auxiliary class Cobalt, name is Cobalt(II) dibromo(1,2-dimethoxyethane), and the molecular formula is C4H10Br2CoO2, Recommanded Product: Cobalt(II) dibromo(1,2-dimethoxyethane).

Referemce:
https://en.wikipedia.org/wiki/Bromide,
bromide – Wiktionary

Katz, Thomas J. published the artcileSynthesis and properties of optically active helical metallocene oligomers, COA of Formula: C4H10Br2CoO2, the publication is Journal of the American Chemical Society (1993), 115(8), 3182-98, database is CAplus.

Syntheses are described for optically active oligomers, of I (R = H, SiMe₃) and CO⁺PF₆^–. The steps required have three essential features: (1) a bromine directs a photocyclization, blocking both the position it occupies and the one adjacent. (2) An acid scavenger (propylene oxide) prevents benzylic ethers from being eliminated during photocyclization. (3) The stereogenicity of one carbon controls the direction in which the helix winds. The oligomers are the first to be prepared in which metallocenes are joined by conjugated systems of double bonds. Their optical activity is very high. The cyclic voltammogram of the Co-containing oligomer of I (R = H) (II) shows two cathodic waves whose closeness implies that the interaction between adjacent units is weak. When II is reduced electrochem. on Pt, a film of neutral oligomers is produced. This film is conductive, and it catalyzes charge transfer. Its weight, measured using a quartz crystal microbalance after the amount of reduction was analyzed coulometrically, measured the mol. weight of II.

Journal of the American Chemical Society published new progress about 18346-57-1. 18346-57-1 belongs to bromides-buliding-blocks, auxiliary class Cobalt, name is Cobalt(II) dibromo(1,2-dimethoxyethane), and the molecular formula is C4H10Br2CoO2, COA of Formula: C4H10Br2CoO2.

Referemce:
https://en.wikipedia.org/wiki/Bromide,
bromide – Wiktionary

Koelle, U. published the artcileCpCoBr intermediates in the cyclopentadienylation of CoBr₂ with sodium cyclopentadienide, Computed Properties of 18346-57-1, the publication is Journal of Organometallic Chemistry (1982), 233(2), 253-8, database is CAplus.

Reaction of CoBr₂ and NaCp (Cp = η⁵-cyclopentadienyl) at low temperature, followed by addition of diene or acetylene gives the complexes CpCo(diene). The scope and mechanism of this novel reaction were investigated. The intermediate is [CpCoBr]₂. Further reaction of Cp₂Co and CoBr₂ gives [CoCp₂]Br and Co, the amounts of which vary with the reaction time.

Journal of Organometallic Chemistry published new progress about 18346-57-1. 18346-57-1 belongs to bromides-buliding-blocks, auxiliary class Cobalt, name is Cobalt(II) dibromo(1,2-dimethoxyethane), and the molecular formula is C4H10Br2CoO2, Computed Properties of 18346-57-1.

Referemce:
https://en.wikipedia.org/wiki/Bromide,
bromide – Wiktionary

Herberich, Gerhard E. published the artcileDerivatives of borole. V. Synthesis of [1-(diisopropylamino)borole]metal complexes and the Diels-Alder dimer of 1-(diisopropylamino)borole, Category: bromides-buliding-blocks, the publication is Chemische Berichte (1985), 118(11), 4303-13, database is CAplus.

Oxidation of Li [1-(diisopropylamino)borolenediide] (I) with SnCl₂ forms the Diels-Alder dimer II. I is a versatile reagent for the formation of [1-(diisopropylamino)borole]metal complexes. Suitable substrates are metal halides (CoBr₃·DME, NiCl₂·DME), organometallic metal halides, and simple metal halides in the presence of CO. Thermal reactions of II with carbonyl compounds may also give borole complexes. Fifteen compounds of Cr, Mn, Fe, Co, Ni, Ru, and Rh, including triple-decked complexes, are described.

Chemische Berichte published new progress about 18346-57-1. 18346-57-1 belongs to bromides-buliding-blocks, auxiliary class Cobalt, name is Cobalt(II) dibromo(1,2-dimethoxyethane), and the molecular formula is C4H10Br2CoO2, Category: bromides-buliding-blocks.

Referemce:
https://en.wikipedia.org/wiki/Bromide,
bromide – Wiktionary

Li, Yan published the artcileCobalt-catalysed enantioselective C(sp³)-C(sp³) coupling, COA of Formula: C4H10Br2CoO2, the publication is Nature Catalysis (2021), 4(10), 901-911, database is CAplus.

Enantioselective C(sp³)-C(sp³) coupling substantially impacts organic synthesis but remains challenging. Cobalt has played an important role in the development of homogeneous organometallic catalysis, but there are few examples of its use in asym. cross-coupling. Here, a cobalt-catalyzed enantioselective C(sp³)-C(sp³) coupling reaction, namely, alkene hydroalkylation, to access chiral fluoroalkanes was reported. This reaction represents a catalyst-controlled enantioselective coupling mode in which a tailor-made auxiliary is unnecessary; via this reaction, an aliphatic C-F stereogenic center can be introduced at the desired position in an alkyl chain.

Nature Catalysis published new progress about 18346-57-1. 18346-57-1 belongs to bromides-buliding-blocks, auxiliary class Cobalt, name is Cobalt(II) dibromo(1,2-dimethoxyethane), and the molecular formula is C4H10Br2CoO2, COA of Formula: C4H10Br2CoO2.

Referemce:
https://en.wikipedia.org/wiki/Bromide,
bromide – Wiktionary

Chaudhuri, N. Ray published the artcileNonisothermal studies of adduct molecules of metallic halides with oxo compounds in solid state. III, SDS of cas: 18346-57-1, the publication is Bulletin of the Chemical Society of Japan (1975), 48(10), 2837-41, database is CAplus.

Nonisothermal studies of some adduct mols. of metal halides with ethylene glycol dimethyl ether (L) of the type MX2Ly in solid state were carried out with a derivatograph, where M = Mn(II), Co(II), Ni(II), Cu(II) or Cd(II), X = Cl- or Br-, and y = 0.5-1. These adduct mols. lost L in single or multiple steps upon heating. Thermally stable intermediate products were isolated and characterized by elemental anal. and ir spectral measurement. The activation energy for each step of decomposition of the adduct was evaluated from the anal. of thermogravimetry, differential thermogravimetry, and DTA curves of the resp. derivatograms. Enthalpy change was evaluated from the DTA peak area and the order of reaction was unity for each step of decomposition Thermal parameters for the above adducts were compared with those for the corresponding type of adducts with oxo-compounds like dioxane or THF.

Bulletin of the Chemical Society of Japan published new progress about 18346-57-1. 18346-57-1 belongs to bromides-buliding-blocks, auxiliary class Cobalt, name is Cobalt(II) dibromo(1,2-dimethoxyethane), and the molecular formula is C4H10Br2CoO2, SDS of cas: 18346-57-1.

Referemce:
https://en.wikipedia.org/wiki/Bromide,
bromide – Wiktionary