Synthesis of octochlorosubstituted cobalt(II) and copper(II) complexes with phthalocyanine

Abstract

A modified method for the synthesis of metallooctachlorophthalocyanines and methods for their purification based on their sequential treatment with hydrochloric acid (10%) sodium hydroxide (2M), then again with hydrochloric acid (10%), pyridine (O.S.C.) in 1,2,4- trichlorobenzene as a solvent is presented. As a result, the degree of purification of copper ion complexes was achieved, 99% versus the best result using methods known in the literature 93%, for cobalt the degree of purity was 98% versus 88%. The yield of the products is also higher than in the known methods and amounted to 78, cobalt -43 for copper compounds. Physico-chemical methods have established that after the final stage of purification-pyridine treatment, impurities are removed, including cyanuric acid, the decomposition product of urea, the results of elemental analysis for carbon, hydrogen, nitrogen conducted on the ThermovomTypFlashEA 1112 analyzer complexes of cobalt (II), copper (II) with phthalocyanine, the assignment of bands of IR spectra recorded in KBr tablets on the Nicolet IR-200 FT - IR spectrophotometer, UV- the spectra of sulfuric acid solutions of metallooctachlorophthalocyanines taken on a Varian, UV - Vis/NIR spectrometer.