66788-58-7

Basic information

• Product Name: 4-Bromo-benzenesulfonic acid potassium salt
• Synonyms: 4-BROMO-BENZENESULFONIC ACID POTASSIUM-SALT 98%;4-Bromo-benzenesulfonic acid potassium salt;Potassium 4-bromobenzenesulfonate
• CAS NO: 66788-58-7
• Molecular Formula: C₆H₄BrO₃S*K
• Molecular Weight: 275.16
• Mol File: 66788-58-7.mol
• Article Data: 3

Chemical Properties

• Appearance: /
• CAS DataBase Reference: 4-Bromo-benzenesulfonic acid potassium salt(CAS DataBase Reference)
• NIST Chemistry Reference: 4-Bromo-benzenesulfonic acid potassium salt(66788-58-7)
• EPA Substance Registry System: 4-Bromo-benzenesulfonic acid potassium salt(66788-58-7)

Safety Data

• Hazardous Substances Data: 66788-58-7(Hazardous Substances Data)

Usage

General Description

4-Bromo-benzenesulfonic acid potassium salt is a chemical compound that consists of a potassium cation and a 4-bromo-benzenesulfonic acid anion. It is a white to off-white solid that is soluble in water and alcohol. 4-Bromo-benzenesulfonic acid potassium salt is commonly used as a reagent in organic synthesis and as a catalyst in various chemical reactions. It is also used in the production of pharmaceuticals, dyes, and other organic compounds. Additionally, it can be employed in the treatment of wastewater and as a corrosion inhibitor in industrial processes. Overall, 4-Bromo-benzenesulfonic acid potassium salt has a range of applications in the field of chemistry and industrial processes.

InChI:InChI=1/C6H5BrO3S.K/c7-5-1-3-6(4-2-5)11(8,9)10;/h1-4H,(H,8,9,10);/q;+1/p-1

Upstream product

• 58816-79-8 1,2,2,3,3,4,4,5,5,6,6-undecafluorocyclohexanecarbonyl chloride 
• 13939-73-6 2-(pyrrolidin-(2E/2Z)-ylidene)acetonitrile 
• 33843-80-0 perfluorocyclohexancarbohydrazide 
• 108-86-1 bromobenzene 
• 98-58-8 4-bromobenzenesulfonyl chloride 
• 127-08-2 potassium acetate 
• 6588-63-2 1,2,2,3,3,4,4,5,5,6,6-undecafluorocyclohexanecarbonyl fluoride 

Downstream Products

• 623-26-7 terephthalonitrile 

Relevant articles and documents

Square-planar 2-toluenido(triphenylphosphane)nickel(II) complexes containing bidentate N,O ligands: An example of planar chirality

Nickel(II) complexes comprising electronically delocalised N,O-chelating ligands are active catalysts in the copolymerisation of carbon monoxide and ethene. Elucidating the mechanism of catalysis presupposes the basic understanding of the intramolecular flexibility of such transition metal complexes. Several nickel(II) complexes with or without planar chirality were synthesised and characterised by NMR spectroscopic techniques and X-ray diffraction.

The acetolysis of exo- and endo-5,6-Dimethylidene-2-Norbornyl p-Bromobenzenesulfonates and of their Optically Active and Deuterium-Labelled Derivatives

The buffered (AcOK) acetolyses of exo (11) and endo-5,6-dimethylidene-2-norbornyl brosylate (12) yielded exo-5,6-dimethylidene-2-norbornyl (16) and (3-methylidene-2-nortricyclyl)methyl acetates (18).Endo-5,6-dimethylidene-2-norbornyl (17) and 2-methylidene-3-tricyclo3,6>octyl acetates (20) could not be detected.The titrimetric rate constants of the acetolysis of 11 (kt(exo)=(4.49+/-0.02)E-3/s at 25 deg C, ΔH(excit.)=23.6+/-0.7 kcal/mol ΔS(excit.)=0.7+/-2 cal/mol*K) and 12 (kt(endo)=(1.9+/-0.08)E-9/s at 25 deg C, ΔH(excit.)=27+/-1kcal/mol, ΔS(excit.)=-8+/-2.5 cal/mol*K)were measured and compared with the polarimetric rateconstants (ka/kt(exo)=6.8at 25 deg C, ka/kt(endo)=1.0 at 121 deg C) of the buffered acetolyses of the optically active brosylates (+)-11 and (+)-12.Neither a common-ion (KOBs) nor a special ion effect (LiClO4) on kt(exo) could be detected, although external return might well intervene as some exo-5,6-dimethylidene-2-norbornyl tosylate (21) was formed upon solvolysis in the presence of KOTs.Acetolysis of (+)-11 yielded completely racemized products, whereas (+)-12 led to incomplete racemization.The buffered acetolysis of exo (3exo-D)-5,6-dimethylidene-2-norbornyl brosylate (24) furnished (3exo-D)-(26: 37.5percent), exo-(7syn-D)-5,6-dimethylidene-2-norbornyl (27: 37.5percent) and methyl acetates (28:25percent).The acetolysis f endo(2exo-D)-5,6-dimethylidene-2-norbornyl brosylate(25) yielded (2endo-D)(29:54percent), exo-(1-D)-5,6-dimethylidene-2-norbornyl (30:36percent) and ,(6-D)-3-methylidene-2-nortricyclyl>methyl acetates (31:10percent).Product analysis and deuterium label distribution was established by a combination of GC.,1H-NMR.,2H-(1H)-NMR. and MS techniques.The results are rationalized by involking anchimerically assisdted ionization of the exo brosylate 11 to symmetrical ion-pairs cyclopropyl carbinyl cation intermediates) which undergo internal (and probably also internal) return.Acetolyses of the endo-brosylate 12 is not anchimetrically assisted and leads initially to non-symmetrical ion pairs.These evolve to symmetrical ion pair intermediates or, to a minor extent, are intercepted by solvent.