Two new three-dimensional supramolecular architectures comprised of 1D single- and double-strand helical chains based on metal-(1-pyrazolyl)pyridazine system

A new copper(I) compound [CuI(bppd)(μ-SCN)] (1) (bppd = 3,6-bis(1-pyrazolyl)pyridazine) and a new manganese(II) compound [MnII(MeOppd)Cl2] · 2H2O (2) (MeOppd = 3-methoxy-6-pyrazol-1-yl-pyridazine), synthesized through solvothermal reactions of CuI with 3,6-bis(1-pyrazolyl)pyridazine in acetonitrile and MnCl2 · 4H2O with 3-chloro-6-pyrazol-1-yl-pyridazine in methanol, respectively, have been characterized by X-ray crystallography. Compound 1 crystallizes in the orthorhombic space group Pca21 with a = 7.145(2) Å, b = 16.836(4) Å, c = 10.562(3) Å, V = 1270.6(5) Å3, and Z = 4. Compound 2 crystallizes in the monoclinic space group C2/c with a = 18.064(2) Å, b = 13.417(2) Å, c = 11.082(1) Å, β = 122.945(2)°, V = 2253.9(4) Å3, and Z = 4. The overall structure of 1 consists of 1D helical coordination chains which are further extended into a 3D supramolecular architecture via π–π stacking and CH⋯N hydrogen bonding interactions. Compound 2 is comprised of hydrogen-bonded double-strand water–chloride helical chains alternately interlinked by the ClMnCl bridges from Λ-[Mn(MeObpd)2Cl2] and Δ-[Mn(MeObpd)2Cl2] isomers, which are further extended into a 3D supramolecular architecture via rich CH⋯Cl hydrogen bonding interactions.