Poly[aqua(μ3-pyridazine-4-carboxylato-κ2O:O:O′)lithium]

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catena-Poly[[diaquaterbium(III)]-tetrakis(μ2-pyridine-4-carboxylato-κ2 O:O′)-[diaquaterbium(III)]-bis(μ2-pyridine-4-carboxylato-κ2 O:O′)]

The title complex, [Tb(2)(C(6)H(4)NO(2))(6)(H(2)O)(4)](n), was isolated under hydro-thermal conditions using the ligand pyridine-4-carb-oxy-lic acid (HL) and Tb(2)O(3). The deprotonated L(2-) ligands adopt bridging coordination modes. The central Tb(III) atom is bridged by L(2-) ligands, forming a polymeric chain parallel to the a axis. Supra-molecular O-H⋯N inter-actions link the chains, build...

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4-(4-Pyridyl)pyridinium pentaaqua(pyridazine-4,5-dicarboxylato)praseodymate(III)

In the title complex, (C(10)H(9)N(2))[Pr(C(6)H(2)N(2)O(4))(2)(H(2)O)(5)], the Pr atom is nine-coordinated by nine O atoms from two pyridazine-4,5-dicarboxyl-ate anions and five water mol-ecules. It is noteworthy that there is a protonated bipyridine mol-ecule in the structure. Inter-molecular O-H⋯O, O-H⋯N and N-H⋯N hydrogen bonds are present, resulting in a three-dimensional network.

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trans-Tetraaquabis(pyridazine-4-carboxylato-κO)magnesium(II) dihydrate

The crystal structure of the title compound, [Mg(C(5)H(3)N(2)O(2))(2)(H(2)O)(4)]·2H(2)O, is composed of centrosymmetric monomers in which an Mg(II) ion is coordinated by two carboxyl-ate O atoms from the two pyridazine-4-carboxylate ligands. The monomers linked by O-H⋯O and O-H⋯N hydrogen bonds into layers which are held together by hydrogen bonds in which solvent water O atoms act as donors an...

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3-Chloro-6-[4-(2-pyridyl)piperazin-1-yl]pyridazine

In the title compound, C(13)H(14)ClN(5), the piperazine ring adopts a chair conformation and the dihedral angle between the aromatic rings is 13.91 (7)°. The crystal structure is stabilized by weak inter-molecular C-H⋯N hydrogen-bond inter-actions.

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