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AMMONIUM CERIUM(IV) SULFATE

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AMMONIUM CERIUM(IV) SULFATE Basic information

Product Name:
AMMONIUM CERIUM(IV) SULFATE
Synonyms:
  • Ammoniumcericsulfate,tetrah
  • Sulfuricacid,ammoniumcerium(4+)salt(4:4:1)
  • sulfuricacid,ammoniumcerium(4++)salt(4:4:1)
  • tetraammoniumceriumtetrakis(sulphate)
  • TETRAAMMONIUM CERIUM(IV) SULFATE
  • TETRA-AMMONIUM CERIUM(IV) SULPHATE
  • CERIUM (IV) AMMONIUM SULFATE
  • CERIUM AMMONIUM SULFATE
CAS:
7637-03-8
MF:
CeH5NO4S
MW:
255.22
EINECS:
231-567-4
Product Categories:
  • Inorganics
  • Catalysis and Inorganic Chemistry
  • Cerium Salts
  • CeriumMetal and Ceramic Science
  • Chemical Synthesis
  • Salts
Mol File:
7637-03-8.mol
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AMMONIUM CERIUM(IV) SULFATE Chemical Properties

solubility 
sol water, dil. H2SO4 ,dil. H2SO4-MeCN.
form 
Liquid
color 
Clear orange
CAS DataBase Reference
7637-03-8(CAS DataBase Reference)
EPA Substance Registry System
Sulfuric acid, ammonium cerium(4+) salt (4:4:1) (7637-03-8)
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Safety Information

Hazard Codes 
Xi
Risk Statements 
36/37/38-36/38
Safety Statements 
26-36
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AMMONIUM CERIUM(IV) SULFATE Usage And Synthesis

Uses

convenient reagent for oxidation of aromatic rings, and halophenols to quinones, for regioselective Baeyer–Villiger oxidation, and oxidative aromatization.

Reactions

Cerium(IV) ion is a potent one-electron oxidant. cerium(IV) ammonium nitrate (CAN), is the most widely utilized cerium(IV) oxidizing agent, but cerium(IV) ammonium sulfate (CAS) is a good substitute when complications due to the involvement of nitrate ligands occur, resulting in side products such as nitrate esters.
Synthesis of Quinones by Oxidation of Aromatic Rings.
The most important application of CAS is in the oxidation of aromatic rings. CAN oxidizes polycyclic aromatic hydrocarbons only in moderate yields (20–60%), and these reactions are often complicated by the formation of nitrate esters. In contrast, CAS generally oxidizes aromatic hydrocarbons to quinones in goodyields.Forexample,naphthalene is oxidized to 1,4-naphthoquinone in excellent yield by CAS in a dilute mixture of H2SO4 and MeCN (eq1).

storage

cerium(IV) ammonium sulfate is a stable reagent and precautions required for handling strong oxidizing agents such as potassium permanganate will be sufficient. Cerium is reputed to be of low toxicity.

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