334030
Cobalt(II) bromide hydrate
Synonym(s):
Cobaltous bromide hydrate
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About This Item
Linear Formula:
CoBr2 · xH2O
CAS Number:
Molecular Weight:
218.74 (anhydrous basis)
EC Number:
MDL number:
UNSPSC Code:
12161600
PubChem Substance ID:
NACRES:
NA.22
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form
solid
Quality Level
reaction suitability
core: cobalt
reagent type: catalyst
SMILES string
O.Br[Co]Br
InChI
1S/2BrH.Co.H2O/h2*1H;;1H2/q;;+2;/p-2
InChI key
MOTZAWYGLXXRSO-UHFFFAOYSA-L
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Application
Catalyst for C-metal, C-heteroatom and C-C bond formations, addition to unsaturated bonds, cyclizations, functional group transformations, polymerization, oxidations and reductions, carbonylations.
Signal Word
Warning
Hazard Statements
Precautionary Statements
Hazard Classifications
Acute Tox. 4 Dermal - Acute Tox. 4 Inhalation - Acute Tox. 4 Oral - Eye Irrit. 2 - Skin Irrit. 2 - STOT SE 3
Target Organs
Respiratory system
Storage Class Code
11 - Combustible Solids
WGK
WGK 3
Flash Point(F)
Not applicable
Flash Point(C)
Not applicable
Personal Protective Equipment
dust mask type N95 (US), Eyeshields, Gloves
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Gerhard Hilt et al.
Chemical communications (Cambridge, England), (11), 1474-1475 (2005-03-10)
The intermolecular cyclotrimerisation of terminal and internal alkynes can be catalysed by simple cobalt complexes such as a CoBr2(diimine) under mild reaction conditions when treated with zinc and zinc iodide with high regioselectivity in excellent yields.
Efficient cobalt-catalyzed formation of unsymmetrical biaryl compounds and its application in the synthesis of a sartan intermediate.
Muriel Amatore et al.
Angewandte Chemie (International ed. in English), 47(11), 2089-2092 (2008-02-09)
Kei Murakami et al.
Organic letters, 11(11), 2373-2375 (2009-05-12)
Cobalt(II) bromide catalyzes arylzincation of alkynes with arylzinc iodide x lithium chloride complexes in acetonitrile. The scope of the arylzincation is wide enough to use unfunctionalized alkynes, such as 6-dodecyne, as well as arylacetylenes. The inherent functional group compatibility of
Hyacinthe Fillon et al.
Journal of the American Chemical Society, 125(13), 3867-3870 (2003-03-27)
A new chemical method for the preparation of arylzinc intermediates is described in acetonitrile, on the basis of the activation of aryl bromides by low-valent cobalt species arising from the reduction of cobalt halide by zinc dust. This procedure allows
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