Polymeric phthalocyanines and their precursors, 8. Synthesis and analytical characterization of polymers from 1,2,4,5‐benzenetetracarbonitrile

Abstract Polymers 3 were prepared by reaction of 1,2,4,5‐benzenetetracarbonitrile ( 2 ) or 2,3,9,10,16,17,23,24‐(29 H , 31 H )‐phthalocyanineoctacarbonitrile ( 5a ) with various metal salts or metals. The polymer structures were investigated by comparing their IR and UV/VIS spectra with those of 5 . Structurally uniform polymeric phthalocyanines 3 with a number of phthalocyanine units P c ⩾ 8, containing only nitrile end groups, were obtained from 2 or 5a with various copper salts. By saponification of 3 polymers ( P c ⩾ 3) with carboxylic acid end groups were obtained. The reactions of 2 or 5a with other metal salts or metals yielded polymers of varying structural uniformity. Metal free 3a was also synthesized.