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

Abstract

A new copper(I) compound [Cu I(bppd)(μ-SCN)] ( 1) (bppd = 3,6-bis(1-pyrazolyl)pyridazine) and a new manganese(II) compound [Mn II(MeOppd)Cl 2] · 2H 2O ( 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 MnCl 2 · 4H 2O 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 Pca2 1 with a = 7.145(2) Å, b = 16.836(4) Å, c = 10.562(3) Å, V = 1270.6(5) Å 3, 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) Å 3, 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 C H⋯N hydrogen bonding interactions. Compound 2 is comprised of hydrogen-bonded double-strand water–chloride helical chains alternately interlinked by the Cl Mn Cl bridges from Λ-[Mn(MeObpd) 2Cl 2] and Δ-[Mn(MeObpd) 2Cl 2] isomers, which are further extended into a 3D supramolecular architecture via rich C H⋯Cl hydrogen bonding interactions.