Reaction #2161225

Reaction equation

water

cobalt acetate tetrahydrate

porphyrin

( 2 )

tetrakis(4-ethynylphenyl)porphyrin

→

cobalt tetrakis(4-ethynylphenyl)porphyrin

Yield 65.0%

Solvents

DMF

DMF

Conditions

Workup

1. 1
   OtherThe mixture obtained
2. 2
   Temperaturewas refluxed for 20 hours
3. 3
   ExtractionThe mixture was subsequently extracted with ethanol (4×200 ml)
4. 4
   Otherthe organic phase was then evaporated
5. 5
   workup.DISSOLUTIONThe residue was dissolved in 300 ml of ethanol
6. 6
   Washthe organic phase was washed with 3×200 ml of water
7. 7
   Dryingdried over sodium sulfate
8. 8
   OtherThe solvent was evaporated off

Procedure

A solution of 8.71 g (35 mmol) of cobalt acetate tetrahydrate (Co(CH3COO)2.4H2O) in 100 ml of DMF was added portionwise to a solution of 1.7 g (2.39 mmol) of porphyrin TEPP (2) as obtained above in step 2), in 500 ml of DMF. The mixture obtained was refluxed for 20 hours. The heating was stopped and 150 ml of water were added to the reaction medium. The mixture was subsequently extracted with ethanol (4×200 ml) and the organic phase was then evaporated. The residue was dissolved in 300 ml of ethanol, and the organic phase was washed with 3×200 ml of water and dried over sodium sulfate. The solvent was evaporated off and the cobalt tetrakis(4-ethynylphenyl)porphyrin (Co-TEPP) (4) (1.19 g; 1.55 mmol; yield: 65%) was obtained in the form of a powder that was purple/black in color, and red in solution in chloroform.

Source