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organic compounds
In the hydrogen-bonded structure of the title complex, O2S(C6H4OH)2.C10H8N2 or C12H10O4S.C10H8N2, the bis-phenol molecules are linked into C(8) chains by means of O-HO=S hydrogen bonds and the 2,2'-bipyridyl units, which act as single acceptors only, are pendent from these chains by means of O-HN hydrogen bonds. Pairs of these chains, related by centres of inversion, are mutually interlocked via their pendent arms.