catena-Poly[[lead(II)-μ-(2-oxidobenz­aldehyde isonicotinoylhydrazonato)] methanol monosolvate]

The Pb atom in the polymeric title compound, {[Pb(C13H9N3O2)]·CH3OH}n, is five-coordinated within an N2O2 donor set and a lone pair of electrons, as the N-isonicotinamido­salicylaldiminate ligand coordinates the PbII atom via the O,N,O′-donors and simultaneously bridges a neighbouring Pb atom via the pyridine N atom; the coordination geometry is based on a trigonal bipyramid with the O atoms in axial positions. The resulting supra­molecular chain is a 31 helix along the c axis. These chains are linked via inter­molecular Pb⋯O,N inter­actions, as well as O—H⋯O hydrogen bonds

Bis{4-bromo-2-[(naphthalen-1-yl­imino)­meth­yl]phenolato-κ2 N,O}copper(II)

The title complex, [Cu(C17H11BrNO)2], lies on a centre of inversion. The chelating Schiff base anions define a square-planar N2O2 donor set. The nearly perpendicular orientation of the naphthyl residues of the chelate ring [dihedral angle = 82.12 (12)°] precludes the CuII centre from additional coordination. In the refinement, the naphthyl rings were found to be disordered over two positions.; the major component has a site occupancy of 0.667 (4)

Di-μ-chlorido-bis­[(1,10-phenanthroline-κ2 N,N′)(trichloro­acetato-κO)copper(II)]

The title compound, [Cu2(C2Cl3O2)2Cl2(C12H8N2)2], features a centrosymmetric binuclear complex. The coordination geometry around the CuII atom is square-pyramidal, comprising two N atoms from a symmetrically chelating 1,10-phenanthroline ligand, one O atom from a trichloro­acetate ligand and two Cl− anions. In addition, there is a weak intra­molecular Cu⋯O inter­action of 2.9403 (14) Å involving the carbonyl O atom of the trichloro­acetate ligand. The central Cu2Cl2 core takes the form of a rhombus, owing to the disparate Cu—Cl bond lengths. Mol­ecules are connected in the crystal structure by C—H⋯Cl and C—H⋯O inter­actions

catena-Poly[[(1,10-phenanthroline-κ2 N,N′)lead(II)]-di-μ-nitrato-κ3 O,O′:O′′;κ3 O:O′,O′′-[(1,10-phenanthroline-κ2 N,N′)lead(II)]-bis­(μ-2,2,2-trichloro­acetato-κ2 O:O′)]

In the title PbII complex, [Pb2(C2Cl3O2)2(NO3)2(C12H8N2)2]n, the 1,10-phenanthroline ligand is chelating, the nitrate anion chelates one PbII ion and simultaneously bridges a neighbouring PbII ion via the third O atom, and the trichloro­acetate anion is bidentate, bridging two PbII ions. The coordination geometry is based on a penta­gonal–bipramidal geometry defined by an N2O5 donor set with no obvious stereochemical role for the lead-bound lone pair of electrons. The coordination polymer has a zigzag topology along [010] and comprises alternating eight-membered {PbONO}2 and {PbOCO}2 rings

cis-Dioxido[N′-(2-oxidobenzyl­idene)pyridinium-4-carbohydrazidato-κ3 O,N′,O′]vanadium(V)

The title Schiff base complex, [V(C13H10N3O2)O2], features a square-pyramidal coordination geometry defined by the O,N′,O′-donors of the tridentate Schiff base ligand and two oxide O atoms; one oxide O atom occupies the apical position. In the crystal, pyridinium–oxide N—H⋯O hydrogen bonds lead to zigzag supra­molecular chains with a flattened topology along [101]. The investigated crystal was twinned by nonmerohedry; the minor component refined to 18.5 (5)%

catena-Poly[[[bis­(methanol-κO)lead(II)]-μ-N′-[1-(pyridin-2-yl-κN)ethyl­idene]isonicotinohydrazidato-κ3 N′,O:N 1] perchlorate]

The PbII atom in the polymeric title compound, {[Pb(C13H11N4O)(CH3OH)2]ClO4}n, is coordinated by an N′-[1-(pyridin-2-yl-κN)ethyl­idene]isonicotinohydrazidate ligand via O,N,N′-donors and simultaneously bridged by a neighbouring ligand via the isonicotinoyl N atom; two additional sites are occupied by methanol O atoms. The resultant supra­molecular chain is a zigzag along the c axis. The PbII atom is seven-coordinated within an N3O3 donor set and a lone pair of electrons, which defines a Ψ-pentagonal–bipyramidal coordination geometry with the pyridine N and lone pair in axial positions. The supra­molecular chains are linked into the two-dimensional array via inter­molecular Pb⋯N [3.020 (4) Å] inter­actions. Layers stack along the a axis, being connected by O—H⋯O hydrogen bonds formed between the coordinated methanol mol­ecules and perchlorate anions

2-[N-(3-Amino-4-nitro­phen­yl)carboximido­yl]phenol

The title compound, C13H11N3O3, is essentially planar (r.m.s. for the 19 non-H atoms = 0.031 Å), a conformation stabilized in part by intra­molecular O—H⋯N and N—H⋯O hydrogen bonds. The configuration about the imine bond [1.2919 (12) Å] is E. The presence of N—H⋯O(nitro) hydrogen bonds leads to the formation of supra­molecular tapes in the crystal structure. These are connected into layers by π–π inter­actions [centroid–centroid distance = 3.6046 (6) Å] occurring between the hy­droxy- and amino-substituted benzene rings

{4-Bromo-2-[(5-chloro-2-oxidophen­yl)imino­methyl]­phenolato-κ3 O,N,O′}(methanol-κO)(methano­lato-κO)­oxidovanadium(V)

The title Schiff base complex, [V(C13H7BrClNO2)(CH3O)O(CH3OH)], features a vanadyl group, a tridentate Schiff base ligand, and coordinated methanol and methano­late ligands. The NO5 donor set is based on a distorted octa­hedron. Helical supra­molecular chains along [010] are found in the crystal structure mediated by O—H⋯O hydrogen bonds formed between the coordinating methanol mol­ecule and the phenolate O atom of the chloro­benzene residue

Preparation of a Novel Nano-scale Lead (II) Zig-Zag Metal–Organic Coordination Polymer with Ultrasonic Assistance: Synthesis, Crystal Structure, Thermal Properties, and NBO Analysis of [Pb(μ-2-pinh)N3 H2O]n

A novel nano-cauliflower-shaped lead(II) metal–organic coordination polymer, [Pb(μ-2-pinh)N3 H2O]n (1), was synthesized using an ultrasonic method. The nanostructure was characterized by scanning electron microscopy (SEM), X-ray powder diffraction, IR spectroscopy, elemental analysis, and thermal analysis. The compound was structurally characterized by single-crystal X-ray diffraction. The coordination compound takes the form of a zig-zag one-dimensional polymer in solid state. The coordination number of the lead(II) ions is six (PbN4O2) with three nitrogen atoms and one oxygen atom from two linker organic ligands, as well as one oxygen from coordinated water and one nitrogen atom from terminal coordinated azide anion. It has a stereo-chemically active lone electron pair, and the coordination sphere is hemidirected. The zig-zag 1D chains interact with neighbouring chains through weak interactions, creating a 3D supramolecular metal–organic framework. Lead oxide nanoparticles were obtained by thermolysis of the new nano coordination compound at 180 °C with oleic acid as a surfactant. The morphology and size were further studied using SEM. Natural bond orbital analyses demonstrate the electronic properties of the lead centre and other atoms