One-dimensional Supramolecular Chain Research Articles

2′,7′-Di-4-pyridylspiro[cyclopropane-1,9′-fluorene] hemihydrate

The asymmetric unit of the crystal structure of the title compound, C25H18N2·0.5H2O, contains two independent dipyridylspiro(cyclopropanefluorene) (CPF) molecules and one solvent water molecule. The two CPF molecules show significantly different dihedral angles between the pyridine rings and fluorene plane. The water molecule links with the CPF molecules via O—H...N hydrogen bonding to form a one-dimensional supramolecular chain.

μ-Aqua-κ2O:O-di-μ-phenylacetato-κ4O:O′-bis[(1,10-phenanthroline-κ2N,N′)(phenylacetato-κO)cobalt(II)

The title mol­ecule, [Co2(C8H7O2)4(C12H8N2)2(H2O)], is a dinuclear CoII complex which is located on a twofold symmetry axis. Each CoII ion is six-coordinated by three O atoms of different phenyl­acetate ligands, two N atoms of the 1,10-phenanthroline ligands and one O atom of a water mol­ecule, giving a distorted octa­hedral geometry. The two CoII atoms are bridged by two phenyl­acetate groups and the water mol­ecule lying on the twofold axis. The Co⋯Co distance is 3.553 (2) A. A one-dimensional supramolecular chain is constructed by π–π stacking inter­actions between adjacent 1,10-phenanthroline mol­ecules.

Diaquatetrakis(μ-2-phenylquinoline-4-carboxylato-κ2O:O′)dicopper(II)(Cu—Cu)

The title complex, [Cu2(C16H10NO2)4(H2O)2], has a centrosymmetric wheel-shaped dinuclear structure in which two symmetry-related CuII centers are bridged by four carboxyl­ate groups of distinct 2-phenylquinoline-4-carboxyl­ate (phqc) ligands, the Cu—Cu separation being 2.6507 (12) Å. Each CuII center is five-coordinated by four O atoms of carboxyl­ate groups in the basal plane and one O atom of a water mol­ecule in the apical position. In addition, the dinuclear mol­ecules are linked by inter­molecular O—H⋯N hydrogen bonds to form a one-dimensional supramolecular chain.

Synthesis and crystal structure of a novel organic–inorganic hybrid hexavanadate [(phen) 4V 6O 12(CH 3OH) 4]·2CH 3OH·4H 2O

A novel organic–inorganic hybrid vanadium oxide [(phen) 4V 6O 12(CH 3OH) 4]·2CH 3OH·4H 2O (phen=1,10-phenanthroline) was synthesized by hydrothermal technique combined with conventional method and structurally characterized by elemental analysis, IR, UV, EPR spectra, TG analysis and single crystal X-ray diffraction. Black-brown crystals crystallized in the monoclinic system, space group P2 1/c , a=9.600 (6) Å, b=22.113 (14) Å, c=14.134 (9) Å, β=96.969 (10)°, V=2978 (3) Å 3, Z=2, and R 1( wR 2)=0.0546 (0.1457). In the title compound, a non-mixed-valence hybrid hexavanadate ( phen ) 4 V IV 6 O 12 ( CH 3 OH ) 4 is constructed by phen and methanol molecules coordinated directly to the vanadium oxide framework. A novel 12-membered ring with a central porous structure is built up by vanadium and bridging oxygen atoms. A one-dimensional supramolecular chain is formed by hydrogen bonding interactions between hexavanadate and solvent molecules. Two-dimensional layer is stabilized by intra-chain π⋯π stacking interaction.

Synthesis and crystal structures of one-dimensional ClO bridged coordination polymers: {[Cu(Bpy)2(μ 2-ClO4)]·ClO4} n and {[Cu2(L-arg)2(Bpy)2( μ 2-ClO4)2]·2ClO4·4H2O} n

The synthesis, structural and spectroscopic characterization of two supramolecular copper(II)-2,2′-bpy complexes of formulas {[Cu(Bpy)2(µ2-ClO4)]·ClO4} n (1) and {[Cu2(L-Arg)2(Bpy)2(µ2-ClO4)2]·2ClO4·4H2O} n (2) (L-Arg = L-argininate; Bpy = 2,2′-bipyridine) are described. The two complexes have a one-dimensional supramolecular long chain structure, due to the μ2-perchlorate ligand between copper ions with a distorted-octahedral geometry. Crystal data of complex (2): triclinic, space group P , a = 10.359(6) Å, b = 14.284(8) Å, c = 18.376(10) Å, α = 112.192(10)°, β = 96.142(9)°, γ = 97.112(10)°, V = 2463(2) Å3, Z = 2, D c = 1.696 g/cm3 , μ = 1.176 mm−1, F(000)=1292, R 1 = 0.1234 for 14735 observed reflections. Spectroscopic (IR and UV-Vis) properties of the complexes are in agreement with the crystal structures of the complexes. CCDC: 213581, 213582.