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

摘要

A new copper(l) compound [Cu-I(bppd)(mu-SCN)] (1) (bppd = 3,6-bis(1-pyrazolyl)pyridazine) and a new manganese(II) compound [Mn-II(MeOppd)Cl-2] center dot 2H(2)O (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 center dot 4H(2)O 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 Pea2(1) with a = 7.145(2) A, b = 16.836(4) angstrom, c = 10.562(3) angstrom, V= 1270.6(5) angstrom(3) and Z = 4. Compound 2 crystallizes in the monoclinic space group C2/c with a = 18.064(2) angstrom, b = 13.417(2) angstrom, c = 11.082(2), beta, = 122.945(2)degrees, V= 2253.9(4) angstrom(3), and Z = 4. The overall structure of I consists of 1D helical coordination chains which are further extended into a 3D supramolecular architecture via pi-pi stacking and C-H center dot center dot center dot 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 Lambda-[Mn(MeObpd)(2)Cl-2] and Delta-[Mn(MeObpd)(2)Cl-2] isomers, which are further extended into a 3D supramolecular architecture via rich C-H center dot center dot center dot Cl hydrogen bonding interactions. (c) 2006 Elsevier B.V. All rights reserved.