ZIRCONIUM AND HAFNIUM DIHYDROXY­PHTHALO­CYANINATES: METHODS OF SYNTHESIS AND REACTIVITY

Usually in order to obtain out-of-plane sub­stituted phthalocyanine complexes of zirconium and hafnium (PcML2), the reaction substitution chlorine atoms dichloridophthalocyaninates PcMCl2 is used. How­ever, this method has some limitations because during reaction, hydrogen chloride released, which can initiate hydrolysis starting compounds sensitive an acidic environment, particular, β-ketoesters, which, turn, lead formation by-pro­ducts and, accordingly, a decrease purity yield target complexes. At same time, similar reactions initial are dihydroxyphthalocyaninates (PcM(OH)2), as result interaction with dicarbonyl or carboxylic acids, water formed, does not have negative effect on substances course whole. Methods obtaining based metal alkoxides by corresponding were investigated work. It was established that synthesis PcM(OH)2 occurs low yields (25–40%), increasing temperature from 140 220oC their significant increase. found should be carried out under more stringent conditions than previously described, makes it possible high yields.
 The reactivity when interacting β-diketones aliphatic acids compared PcMCl2. However, noted case β-ketoesterphthalocyanine complexes, use leads increase final products This explained fact released ester group occur.