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Two supramolecular metal complexes [Cu(II)(terpy)(PCP)(NO)] (1) and [Zn(II)(terpy)(NO)] (2) (terpy=2,2′:6′,2″-terpyridine) (PCP = Pentacyanopropenide) were synthesized and structurally characterized by Single-crystal X-ray diffraction. Single-crystal X-ray diffraction revealed that the PCP ligand coordinated to Cu(II) ion through one CN group, and it was absent from the coordination sphere of Zn(II) complex. In complexes ( 1) and ( 2), 1D chain was formed through C1-H1···O1 and C4-H4···O2 hydrogen-bonding interactions, respectively. The crystal structure was further stabilized by π-π stacking interactions. The thermal stabilities of these compounds were investigated. Furthermore, antimicrobial activities of these compounds were investigated against eight types of bacteria. The copper complex exhibited a significant activity against three types of bacteria with minimal inhibitory concentrations (MICs) under one microgram per milliliter. [ABSTRACT FROM AUTHOR]

Abstract: Two dioxomolybdenum(VI) complexes, [Mo2O4(HBAP)2L] (1) and [MoO2(HMBI)] (2) (HBAP=((E)-2-(2-hydroxybenzylidene)amino)phenol, HMBI=((E)-N′-(2-hydroxy-3-ethoxybenzylidene)isonicotinohydrazide) and L=(4,4′-dipyridyl)), have been synthesized and structurally characterized by elemental analysis, 1H NMR spectroscopy and X-ray single crystal diffraction analysis. In complex (1), a 1D-chain is formed through C⋯H⋯O hydrogen-bonding interactions. In complex (2), a dimer is formed through O⋯H⋯N hydrogen-bonding interactions. This dimer is extended into a 1D chain through secondary C⋯H⋯O hydrogen-bonding interactions, in addition to π–π stacking interactions. Electrochemical measurements showed that both complexes undergo an irreversible reduction in DMF solution. The thermogravimetric analyses clearly indicate that the complexes have high thermal stability. [Copyright &y& Elsevier]

The first dual component pseudocryptand-type [2]pseudorotaxanes were designed and prepared via the self-assembly of synthetically easily accessible bis(meta-phenylene)-32-crown-10 pyridyl, quinolyl, and naphthyridyl derivatives with paraquat. The formation of the pseudocryptand structures in the complexes remarkably improved the association constant by forming the third pseudobridge via H-bonding with the guest and π-stacking of the heterocyclic units. [ABSTRACT FROM AUTHOR]

Abstract: A series of zinc phosphite hybrid structures with trimethylene dipyridine as the linking ligand and templated on the aromatic alcohols, hydroquinone, 1,2,3-trihydroxybenzene, nitrophenol, and bromophenol are reported. The aromatic alcohols interact with the framework by hydrogen bonding to oxygen atoms that bridge zinc and phosphorus atoms in the inorganic portion of the network. In addition, three hydrogen-bonded networks that contain trimethylene-dipyridine and either hydroquinone or 1,2,3-trihydroxybenzene are reported. In these structures, the aromatic alcohol acts as a hydrogen bond donor to trimethylene-dipyridine. The flexibility of trimethylene-dipyridine is important to the construction of the new frameworks. Calculations using PM5 parameters demonstrate that trimethylene-dipyridine can adopt a wide variety of conformations with a minimal energy expense. [Copyright &y& Elsevier]

Abstract: An infinite chain of hydrogen bonded loops of 8 and 10 water molecules are stabilized by the neutral zinc phosphite cluster [Zn4(HPO3)4(2,2′-bipy)4]·11H2O. The cluster is prepared either by direct synthesis or by transformation of a (2,2′-bipy)2Zn2(HPO3)2 4-ring. [Copyright &y& Elsevier]

Abstract: Two new cobalt(II) and zinc(II) coordination networks constructed from an anthracene based bis imidazole ligand, 9,10-bis(imidazol-1-ylmethyl)anthracene ligand (L), are reported. The compounds {[Co (HBTC2−) (L) (H2O)2]·H2O}∞(1) and {[Zn (HBTC2−) (L) (H2O)2]·H2O}∞(2) were synthesized under solvothermal conditions and structurally characterized by single X-ray diffraction analysis and thermogravimetric analysis. Both 1 and 2 have a one-dimensional covalently bonded (1D) zigzag chain structure that is linked into infinite two-dimensional (2D) sheets by inter-chain π···π stacking and hydrogen bonding. [Copyright &y& Elsevier]