Hydrochloric Acid → 1,10-Phenanthroline

HRID 255949Notes

Reaction equation

HRID 255949 reaction equation
C1([C:7]2[C:20]3[C:11](=[C:12]4[C:17](=[CH:18][CH:19]=3)[C:16](C3C=CC=CC=3)=[CH:15][CH:14]=[N:13]4)[N:10]=[CH:9][CH:8]=2)C=CC=CC=1.BrBr.O.Cl.BrBr>C(O)C>[N:10]1[C:11]2[C:20](=[CH:19][CH:18]=[C:17]3[C:12]=2[N:13]=[CH:14][CH:15]=[CH:16]3)[CH:7]=[CH:8][CH:9]=1

Participants

6

Reactant 4

HCID 313Hydrochloric AcidHCID 24408BromineHCID 728124,7-Diphenyl-1,10-phenanthroline2×HCID 86741833Bromine hydrate

Product 1

HCID 13181,10-Phenanthroline

Reagents, catalysts & solvents 1

HCID 702EthanolSolvent

Procedure

Bis (4,7-diphenyl-1,10-phenanthroline)cobalt(III) chloride, (DIP)2Co(III)Cl2, was prepared as follows: 4,7-diphenyl-1,10-phenanthroline (Aldrich) was dissolved in a minimum volume of ethanol to which one half stoichiometric CoCl2.6H2O was added. The green-brown solution was oxidized by using Br2 /H2O, and a heavy orange precipitate formed immediately. The solution was refluxed for 1 h, and concentrated hydrochloride was added. The bromine oxidation was then repeated. The crude complex was recrystallized in aqueous ethanol. Other cobalt(III) complexes of this invention may be prepared by this method by substituting the appropriate ligand for 4,7-diphenyl-1,10-phenanthroline.

Workup

  1. additionwas added
  2. customa heavy orange precipitate formed immediately
  3. temperatureThe solution was refluxed for 1 h
  4. customThe crude complex was recrystallized in aqueous ethanol
  5. customOther cobalt(III) complexes of this invention may be prepared by this method

Sources & evidence

ORD record
ord-253f58096d5f45b08cac89ff024e9f05
Source dataset
uspto-grants-1987_10
Patent number
US04699978

Reaction notes

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