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The reaction of malondialdehyde with mercaptoacetic acid furnishes a tetraacid which upon condensation with 1,2-diaminobenzene gives the tetrathioethertetrabenzimidazole binucleating ligand (L). One copper(I) and three copper(II) complexes of this ligand have been isolated. The latter are not stable in solution where they are reduced by the solvent or the ligand itself. An investigation of the...
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