Novel Copper (II) Thiodibenzoic Acid Coordination Polymers by in situ Extrusion of Sulfur from 2, 2′-Dithiodibenzoic Acid and the Unique Oxidation of Disulfide to Sulfate
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26 November 2022
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Novel Copper (II) Thiodibenzoic Acid Coordination Polymers by in situ Extrusion of Sulfur from 2, 2′-Dithiodibenzoic Acid and the Unique Oxidation of Disulfide to Sulfate
Slow diffusion reaction of 2,2′-dithiodibenzoic acid (dtdb) with CuCl2 in the presence of N-donor ligands results in the formation of different coordination polymers where both S–S and C–S scission and oxidation of S is observed. X-ray diffraction analysis of [Cu(tdb)(phen)(H2O)]2·2H2O.2DMF] (1), [Cu(tdb)(py)2(H2O)]2 (3), and [Cu(tdb)(bipy)(H2O)]2·0.5H2O (4) (tdb = thiodibenzoic acid, phen = phenanthroline, py = pyridine, bipy = 2,2′-bipyridine) show that the metal ions are coordinated to the carboxylate oxygen atoms of the in situ generated tdb ligand in a monodenate fashion. In [Cu(phen)(SO4)2(H2O)2]n (2) and [Cu(bipy)(SO4)2(H2O)2]n (5), the sulfur is oxidized to sulfate ions prior to coordination with the metal. Complex 1 has a dimeric structure with π–π interactions between the phen ligands, whereas 3 and 4 form 1D polymeric chains.
