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The dinuclear title complex, [Co2(C15H8O7)2(H2O)6], lies across an inversion center. The unique CoII ion is coordinated in a slightly distorted octa­hedral coordination geometry by two O atoms from a chelating 4-(carb­oxy­phen­oxy)phthalate ligand, three water O atoms and a further O atom from a bridging carboxyl­ate group of a symmetry-related 4-(carb­oxy­phen­oxy)phthalate ligand. In the crystal, O—H...O hydrogen bonds link the mol­ecules into a three-dimensional network.

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The title compound, [Zn(CH3CO2)Cl(C14H14N4)]n, is a one-dimensional coordination polymer in which the ZnII ion is tetrahedrally ­coordinated by two N atoms of a bridging 1,1′-[1,4-phenyl­enebis(methyl­ene)]di-1H-imidazole ligand, an acetate O atom and a Cl atom. The Cl atom, two acetate O atoms and two acetate C atoms are located on a mirror plane. The coordination of the diimidazole ligand to the ZnII ion gives an infinite one-dimensional zigzag structure along the b-axis direction with the charge balanced by the chloride and acetate ions.

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In the title mol­ecule, C37H48O4S, the benzene rings in the biphenyl fragment are inclined to each other at 61.1 (1)°. The hy­droxy group is involved in a weak intra­molecular O—H...Osulfonate hydrogen bond. One tert-butyl group is disodered over two orientations in a 0.682 (17):0.318 (17) ratio. In the crystal, weak C—H...O hydrogen bonds link the mol­ecules into columns in direction [100].
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