Phthalonitrile → Phthalocyanine

Participants

Reaction Steps

Titanium tetrachloride (6.5 ml) is added dropwise to a mixture of phthalodinitrile (25.6 g) and α-chloronaphthalene (150 ml) in a nitrogen stream and the mixture is subjected to reaction at 200°-220° C. for 5 h. The resulting precipitate is recovered by filtration and washed successively with α-chloronaphthalene, chloroform and methanol in the order written. Thereafter, the precipitate is refluxed in aqueous ammonia to complete its hydrolysis, followed by successive washing with water and methanol and drying to obtain titanyl phthalocyanine in an amount of 21.8 g (75.6%).

Provenance & Evidence