Category: 18346-57-1

Meyer, Franc published the artcileTuning the metal-metal separation in pyrazolate-based dinuclear complexes by the length of chelating side arms, Safety of Cobalt(II) dibromo(1,2-dimethoxyethane), the publication is Journal of the Chemical Society, Dalton Transactions: Inorganic Chemistry (1998), 207-214, database is CAplus.

Six dinuclear Co(II) complexes of pyrazolate ligands with multidentate chelating side arms {3,5-(R₂NCH₂)₂C₃N₂H₂; R₂N = [Me₂N(CH₂)₃]₂N (HL¹) or (Et₂NCH₂CH₂)₂N (HL²)} were prepared and characterized. The reaction of L¹ and L² with 2 equiv of [Co(MeCN)₆][BF₄]₂ and NaBPh₄ proceeds via the isolable compounds [Co₂L¹(BF₄)][BPh₄]₂ (1a) and [Co₂L²(BF₄)][BPh₄]₂ (2a) finally to afford dinuclear [Co₂L¹F][BPh₄]₂ (1b) and [Co₂L²(F)(H₂O)][BPh₄]₂ (2b), resp., where a fluoride was abstracted from the BF₄^– starting material in both cases. While the longer side arms in 1b allow for an exogenous bridging position of the fluoride, an addnl. H₂O mol. is incorporated in 2b to form an FHO(H) moiety with an unusually short F-H-O bridge between the two Co centers. Evidence is reported for the reversible extrusion of the H₂O mol. from 2b. Treatment of 2b with KBr or NaN₃ yielded the resp. bromo- and azido-bridged complexes [Co₂L²Br][BPh₄]₂ (3) and [Co₂L²(N₃)][BPh₄]₂ (4), where in the latter case the azide adopts a μ-1,3-bridging mode. The magnetic properties of 3 and 4 were studied in the temperature range 8-200 K. Complexes 1b, 2b·3MeCN, 3·0.25Et₂O and 4·Me₂CO were also characterized by x-ray crystallog.

Journal of the Chemical Society, Dalton Transactions: Inorganic 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, Safety of Cobalt(II) dibromo(1,2-dimethoxyethane).

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

Herberich, G. E. published the artcileDerivatives of 1,2-diborabenzene. II. (1,2-Dibora-3,5-cyclohexadiene)metal complexes. Crystal structure of (C₅Me₅)Rh(C₄H₄B₂Cl₂), Recommanded Product: Cobalt(II) dibromo(1,2-dimethoxyethane), the publication is Journal of Organometallic Chemistry (1988), 355(1-3), 473-84, database is CAplus.

The 1,2-diboratabenzene derivative Li₂[C₄H₄B₂(NMe₂)₂] reacts with various transition metal compounds to form sandwich and triple-decker complexes such as (C₆Me₆)RuL (I), (C₅Me₅)RhL (II), (μ-L)[Rh(COD)]₂ (III, COD = 1,5-cyclooctadiene), NiL₂, Fe(CO)L₂ (IV), and Co₂(CO)₄L₂ (V), where L = 1,2-bis(dimethylamino)-1,2-dibora-3,5-cyclohexadiene in all cases. Barriers to internal rotation around the B-N bond are 48(1), 56(1), and 38(1) kJ/mol for I–III, resp., while IV and V are rigid on the NMR time scale. Nucleophilic substitution reactions at B were examined for the Rh complex II. The Lewis acids BF₃·OEt₂ and BCl₃ bring about substitution to give (C₅Me₅)Rh[C₄H₄B₂F(NMe₂·BF₃)] and (C₅Me₅)Rh(C₄H₄B₂Cl₂) (II), resp. Attempted substitution with Al₂Me₆ and with AlH₃ in THF effected a novel ring contraction to produce the borole complexes (C₅Me₅)Rh(C₄H₄BR) (R = Me, H); similarly, traces of air transform VI into (C₅Me₅)Rh(C₄H₄BCl). The structure of VI, determined by x-ray diffraction confirms the η⁶-bonding mode of the diboracyclohexadiene ligand.

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, Recommanded Product: Cobalt(II) dibromo(1,2-dimethoxyethane).

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

Schroer, Hans P. published the artcileBehavior of some metal halides toward dimethyl glycol ether, Name: Cobalt(II) dibromo(1,2-dimethoxyethane), the publication is Zeitschrift fuer Chemie (1967), 7(6), 238, database is CAplus.

Some metal halides (I), gave adducts with dimethyl glycol ether (II) in the absence of moisture and of air. The adducts prepared were (I, I:II molar ratio in the adduct, and color given): CoBr2, 1:1, blue; CoCl2, 1:1, blue; FeCl3, 1:1, yellow brown; FeCl2, 1:1, white; CdI2, 1:1, colorless; NiBr2, 1:2, orange; CuCl2, 1:0.5, brown; MoCl3, 1:1, red.

Zeitschrift fuer Chemie 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

Li, Yan published the artcileLigand-Controlled Cobalt-Catalyzed Regiodivergent Alkyne Hydroalkylation, Recommanded Product: Cobalt(II) dibromo(1,2-dimethoxyethane), the publication is Journal of the American Chemical Society (2022), 144(30), 13961-13972, database is CAplus and MEDLINE.

Herein, a ligand-controlled cobalt-catalyzed regiodivergent alkyne hydroalkylation was reported. The sensible selection of bisoxazoline and pyridine-oxazoline ligands led to reliable and predictable protocols that provided (E)-1,2-disubstituted and 1,1-disubstituted alkenes with high E/Z stereoselectivity and regioisomeric ratio starting from identical terminal alkyne and alkyl halide substrates and produced trisubstituted alkenes in the case of internal alkynes. This method exhibited a broad scope for terminal and internal alkynes with a wide range of activated and unactivated alkyl halides and shows excellent functional group compatibility.

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, Recommanded Product: Cobalt(II) dibromo(1,2-dimethoxyethane).

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

Zhong, Yongliang published the artcileFunctionalized Polyesters via Stereoselective Electrochemical Ring-Opening Polymerization of O-Carboxyanhydrides, Recommanded Product: Cobalt(II) dibromo(1,2-dimethoxyethane), the publication is ACS Macro Letters (2020), 9(8), 1114-1118, database is CAplus and MEDLINE.

Ring-opening polymerization is used to prepare polyesters with precisely controlled mol. weights, mol. weight distributions, and tacticities. Herein, we report a Co/Zn catalytic system that can be activated by an elec. current to mediate efficient ring-opening polymerization of enantiopure O-carboxyanhydrides, allowing for the synthesis of isotactic functionalized polyesters with high mol. weights (>140 kDa) and narrow mol. weight distributions (M_w/M_n < 1.1). We also demonstrate that these catalysts can be used for stereoselective ring-opening polymerization of racemic O-carboxyanhydrides to synthesize syndiotactic or stereoblock copolymers with different glass transition temperatures compared with their atactic counterparts.

ACS Macro 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 C18H10F3NO3S2, Recommanded Product: Cobalt(II) dibromo(1,2-dimethoxyethane).

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

Herberich, Gerhard E. published the artcileBis(boryl)metallocenes. 2. Syntheses of 1,1′-Bis(boryl)cobaltocenium Complexes, Name: Cobalt(II) dibromo(1,2-dimethoxyethane), the publication is Organometallics (1998), 17(22), 4769-4775, database is CAplus.

Bis(boryl)cobaltocenes Co(C₅H₄BR₂)₂ (1) can be made from CoBr₂(DME) and alkali metal borylcyclopentadienides M(C₅H₄BR₂) (M = Li, Na) (2). The two dialkylamino compounds 1c (R = NMe₂) and 1d (R = NEt₂) can be obtained in this way. Oxidation with C₂Cl₆ provides the ionic cobaltocenium chlorides (1c)Cl and (1d)Cl. Further cobaltocenium compounds can be synthesized by modification of the substituents at B. Treatment of (1d)Cl with excess BCl₃ affords the highly reactive chloride Co(C₅H₄BCl₂)(C₅H₄BCl₃) (5). Pinacolysis of 5 then affords the monosubstitution product Co[C₅H₄B(OCMe₂)₂](C₅H₄BCl₃) (9) and the disubstitution product [Co{C₅H₄B(OCMe₂)₂}₂]Cl [(1h)Cl], resp., depending on stoichiometry and reaction conditions. Reaction of 5 with tetramethyltin replaces two Cl atoms with Me groups to give Co(C₅H₄BMe₂)(C₅H₄BCl₃) (10), while the more reactive trimethylaluminum replaces four Cl substituents to give [Co(C₅H₄BMe₂)₂]AlCl₄ [(1b)AlCl₄] and, after metathesis with NBu₄PF₆ in CH₂Cl₂, the more convenient hexafluorophosphate (1b)PF₆. The corresponding cobaltocene 1b is then accessible via conventional amalgam reduction of (1b)AlCl₄. Reaction of 5 with com. AsF₃ affords the robust inverse chelate Co(C₅H₄BF₂)₂(μ-OH) (11). Three structural types are encountered for the cobaltocenium derivatives: (i) ionic compounds (type A) such as (1c,d,h)Cl, (1b)AlCl₄, and (1b)PF₆; (ii) zwitterionic or semiquaternized compounds (type B) with one trigonal and one tetrahedral B center such as 5, 9, and 10; of these, 5 is fluxional in solution with two effectively equivalent ligands while 9 and 10 display static structures; and (iii) the inverse chelate structure of 11 (type C) which is found in the crystal and in solution The crystal and mol. structures of 11 were determined by x-ray crystallog.

Organometallics 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