Zincum bromatum

Base Information

• Chemical Name: Zincum bromatum
• CAS No.: 7699-45-8
• Molecular Formula: Br₂Zn
• Molecular Weight: 225.198
• European Community (EC) Number: 231-718-4
• UN Number: 3077,9156
• UNII: OO7ZBU9703
• DSSTox Substance ID: DTXSID8052512
• Nikkaji Number: J44.259C
• Wikipedia: Zinc bromide
• Mol file: 7699-45-8.mol

Synonyms:7699-45-8;ZINCBROMIDE;zinc;dibromide;zinc (II) bromide;7899-45-8;ACMC-209p7h;dibromozinc;Br2Zn;ZINCUM BROMATUM;Br2-Zn;ZBR (CHRIS Code);Bromuro de cinc (znbr2);ZINC BROMIDE [MI];ZINC BROMIDE [HSDB];ZINC BROMIDE [WHO-DD];ZINCUM BROMATUM [HPUS];DTXSID8052512;VNDYJBBGRKZCSX-UHFFFAOYSA-L;NA9156;AKOS015833001;Z0013

Chemical Property of Zincum bromatum

Chemical Property:

• Appearance/Colour: white powder
• Melting Point: 394 °C(lit.)
• Boiling Point: 697oC
• PSA: 0.00000
• Density: 4.22
• LogP: 1.68870
• Water Solubility.: soluble, 447 g/100 mL (20℃)
• Hydrogen Bond Donor Count: 0
• Hydrogen Bond Acceptor Count: 2
• Rotatable Bond Count: 0
• Exact Mass: 223.76377
• Heavy Atom Count: 3
• Complexity: 0
• Transport DOT Label: Class 9

Purity/Quality:

99% ^*data from raw suppliers

Safty Information:

• Pictogram(s): C,N
• Hazard Codes: C:Corrosive;;
• Statements: R34:; R50:
• Safety Statements: S26:; S29:; S36/37/39:; S45:; S61:

MSDS Files:

SDS file from LookChem

Total 1 MSDS from other Authors

Useful:

• Chemical Classes: Metals -> Metals, Inorganic Compounds
• Canonical SMILES: [Zn+2].[Br-].[Br-]
• General Description: Zinc bromide (ZnBr?), also known as dibromozinc or zinc dibromide, serves as a key component in a polystyrene-supported zinc bromide-ethylenediamine complex, functioning as a highly efficient and reusable heterogeneous catalyst for the synthesis of α,β-acetylenic ketones. This catalytic system facilitates the cross-coupling of acid chlorides with terminal alkynes, offering excellent yields and operational simplicity while promoting eco-friendly practices through reduced waste and easy catalyst recovery.

Technology Process of Zincum bromatum

There total 48 articles about Zincum bromatum which guide to synthetic route it. The literature collected by LookChem mainly comes from the sharing of users and the free literature resources found by Internet computing technology. We keep the original model of the professional version of literature to make it easier and faster for users to retrieve and use. At the same time, we analyze and calculate the most feasible synthesis route with the highest yield for your reference as below:

synthetic route:

Reference yield: 100.0%

phenylzinc chloride (28557-00-8) + allyl bromide (106-95-6) → allylbenzene (300-57-2,57807-91-7) + biphenyl (92-52-4,1594-86-1) + zinc dibromide (7699-45-8)

Guidance literature:

tetrakis(triphenylphosphine) palladium⁽⁰⁾; In tetrahydrofuran; Ar atmosphere; stirring (20°C, 5 mole-% catalyst, 3.5 h);

DOI:10.1007/BF00959210

Reference yield: 97.0%

hydrogen bromide (10035-10-6,12258-64-9) + zinc(II) oxide → zinc dibromide (7699-45-8)

Guidance literature:

In water; at 50 ℃;

Reference yield: 90.0%

quinoline (91-22-5) + 2-methyl-2-propenylzinc bromide (29777-16-0) → zinc dibromide (7699-45-8) + zinc (7440-66-6) + 4-(2-methylallyl)quinoline

Guidance literature:

In tetrahydrofuran; byproducts: H2; the mixt. was refluxed at 65°C for 6 h, cooled to 0°C; filtered;

DOI:10.1023/A:1015065721466

upstream raw materials:

bromine

zinc

hydrogen bromide

disulphur dibromide

Downstream raw materials:

C₆H₅C(OC₂H₅)CHZnBr₂

Br₂(p-toluidine)2zinc(II)

Zn(N,N-dicyclohexyl-2-benzthiazolylsulfenamide)2Br₂

{Zn(C₁₀H₁₃N₃OS)2Br₂}

Refernces

Polystyrene-supported zinc bromide-ethylenediamine complex as a reusable and highly efficient heterogeneous catalyst for the synthesis of α,β-acetylenic ketones

10.1055/s-0030-1258365

The study presents the development and application of a polystyrene-supported zinc bromide-ethylenediamine complex as a reusable and highly efficient heterogeneous catalyst for the synthesis of α,β-acetylenic ketones. This catalyst enables the rapid and efficient synthesis of these ketones through the cross-coupling of acid chlorides with terminal alkynes, yielding good-to-excellent results. The chemicals used in the study include chloromethylated polystyrene, ethylenediamine, zinc(II) bromide, various acid chlorides, and terminal alkynes. The purpose of these chemicals is to create a catalyst that can be easily prepared, is stable, reusable, and efficient under the reaction conditions, and to synthesize α,β-acetylenic ketones, which are important intermediates in organic synthesis with applications as three-carbon building blocks for the synthesis of heterocycles. The study highlights the advantages of using heterogeneous catalysts in coupling reactions, such as waste reduction and ease of catalyst recovery and reuse, contributing to a simpler and more eco-friendly experimental procedure.