Phthalocyanine, chloroferric

Ferrous phthalocyanine is aerially oxidized in concentrated hydrochloric acid suspension to chloroferric phthalocyanine (LXXIV) (11). The ease with which this is formed suggests that it might be a simple hydrochloride, but this possibility was eliminated by quantitative oxidation (89), which indicated the presence of ferric ion. The magnetic behavior is quite different from that of ferrous phthalocyanine (215) (see Section V,D), and is interpreted in terms of a dimer involving metal-metal bonds. An X-ray structural analysis is really required to prove this point, however. The complex (LXXIV) sublimes almost quantitatively, ferrous phthalocyanine and hydrogen chloride being formed (10, 213). The source of the hydrogen is a mystery and further work is required. 

Most of the labile metal phthalocyanines react at a similar rate, indicating that demetallation occurs rapidly by reaction (LXXX) which is followed more slowly by reactions (LXXXII)-(LXXXIV). There is some evidence that silver and chloroferric phthalocyanines may undergo some ring cleav-... 

Certain metal derivatives, particularly the ferrous and chloroferric complexes, catalyze the decomposition of hydrogen peroxide. They are themselves destroyed in the process (58, 127, 871). Paquot and his coworkers have extensively investigated the catalytic properties of the phthalocyanines (71, 270-277). Nickel phthalocyanine is a useful catalyst for the autoxidation of a-carbon atoms of ethylenic molecules. Thus nickel phthalocyanine (0.4%) catalyzes the aerial oxidation of cyclo-... 

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