Polydi-1,2-(diazinylidene)-ethene-1,2-diols

摘要

Poly[di-1,2-(diazinylidene)-ethene-1,2-diols] having the structure: PPX--C.sub.4 H.sub.2 N.sub.2 --C(OH)C(OH) --C.sub.4 H.sub. 2 N.sub.2 --C(OH) ].sub.n C(OH)--C.sub.4 H.sub.2 N.sub.2 --YP P in which the C.sub.4 H.sub.2 N.sub.2 group is a diazinylidene diradical having each C(OH) group adjacent (ortho) to one but not two ring nitrogen atoms and not adjacent (ortho) to each other; X and Y are terminal formyl (CHO) groups or groups derived from them by oxidation; and n has a value of zero to seven--are prepared by a cyanide ion catalyzed condensation of pyrazine-2,5-dicarboxaldehyde, pyridazine-3, 6- dicarboxaldehyde; or pyrimidine-4,6-dicarboxaldehyde as the only aldehydes which provide the requisite structures. The polymers form complexes with metal ions including manganese, which is insoluble, and vanadium, which is soluble.